Number Of Effective Tillers Hill-1 Research Articles

Response of Boro Rice (cv. BRRI dhan89) Yield to Foliar Application of Micronutrients

Insufficient management of nutrients poses a significant obstacle to achieving sustainable rice production in tropical climates. To address this challenge, an investigation was conducted to find the potential impact of micronutrients on enhancing the yield of Boro rice through foliar application. The study was structured using a randomized complete block design and replicated three times. Field trials were conducted with three micronutrients (Boron, Zinc and Copper) and involved seven treatments, namely control (NPK), NPK + Zinc, NPK + Boron, NPK + Zinc + Boron, NPK + Zinc + Copper, NPK + Boron + Copper, and NPK + Zinc + Boron + Copper. The addition of zinc, boron and copper led to a notable enhancement in the factors contributing to yield. The maximum number of total tillers hill-1 (11.29), effective tillers hill-1 (10.09), panicle length (24.69), grain panicle-1 (138.36), grain yield (5.43 t ha-1) and straw yield (7.22 t ha-1) was resulted when NPK + Zinc + Boron + Copper applied together. The least grain yield (3.64 t ha-1) was produced in control (NPK) owing to lower number of effective tillers hill-1 (7.46), lower number of grain panicle-1 (118.46) and higher number of sterile spikelet panicle-1 (25.46). The findings suggested that the appliance of NPK combined with Zn, B and Cu yielded superior in BRRI dhan89.

Impact of Climate Resilient Technology on Growth and Yield of Paddy (Oryza sativa L.) under Submergence Condition

The submergence of rice fields is a significant issue in India's rice production, which is further aggravated by the unpredictable monsoon rain patterns and the impact of climate change. Larger variation in rainfall patterns affected by the timing of nursery raising and transplanting later in the main field therefore, we adopted Climate Resilient Technology (CRT) for rice production, Extended seedbed durations for rice seedlings allow for adequate rainfall during the monsoon season. So that the experiment was conducted at 30 farmer’s fields of NICRA village, Khana Bari, Kishanganj, Bihar, India, in 2022 under the supervision farm science Center, Kishanganj, the experiment was framed in randomized block design with ten replications. All plots received the recommended dose of fertilizers (120:60:40 kg ha-1 N.P.K.) in equal amounts. Urea, di-ammonium phosphate, and muriate of potash were used as the sources of nitrogen, phosphorus, and potassium, respectively. To determine the growth characters i.e., plant height (cm) at harvest stage, number of effective tillers hill-1, LAI, Chlorophyll concentration (SPAD) and days to 50 per cent flowering were recorded at 90 days. Yield attributes viz., After the completion of the harvest, various observations were recorded, such as the number of panicles/m2, the number of grains per panicle, the number of filled and unfilled grains per panicle, the test weight in grams, and the yield. This encompassed grain yield, straw yield, biological yield in quintals per hectare, and harvest index percentage. During the field experiment, both the climate-resilient technology Swarna Sub1 and Sabour Sampans paddy varieties were tested. Swarna Sub1 was found to be significantly superior in terms of plant growth, yield attributes, and yield characteristics. under submergence conditions. The significant maximum grain yield (48 q ha-1), straw yield (84 q ha-1), biological yield (153 q ha-1), and harvest index (45%) were recorded in Swarna Sub-1.

Influence of seedling age and integrated nutrient management on growth and yield of aromatic rice (cv. BRRI dhan34)

To investigate the performance of aromatic rice (cv. BRRI dhan34) in response to seedling age and nutrient management, an experiment was carried out at the Sher-e-Bangla Agricultural University, Dhaka from July to December 2021. The experiment includes three different ages of seedlings to be transplanted viz., 30, 45 and 60 days old and six nutrient management practice viz. control (no manures and fertilizers), recommended dose of inorganic fertilizers (RDF), 50% of RDF + cow dung @ 5 t ha-1, 75% of RDF + cow dung @ 5 t ha-1, 50% of RDF + poultry manure @ 2.5 t ha-1 and, 75% of RDF + poultry manure @ 2.5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. The results revealed that in the case of transplanting of different aged seedlings, the highest leaf area index (5.74), dry matter hill-1 (32.86 g), number of tillers hill-1 (13.17), number of effective tillers hill-1 (11.53), plant height (113.34 cm), total grains panicle-1 (135.14), 1000-grain weight (12.45 g), grain yield (3.29 t ha-1), straw yield (4.01 t ha-1), biological yield (7.30 t ha-1) and were recorded from transplanting 30 days old seedlings. Different levels of nutrient management showed a significant impact on most of the parameters under study. The highest total dry matter hill-1 (34.02 g), the maximum LAI (5.35), plant height (115.70 cm), chlorophyll content (42.87), number of effective tillers hill-1 (12.99), panicle length (24.63 cm), total grains panicle-1 (140.17), 1000-grain weight (12.54 g), grain yield (3.27 t ha-1), straw yield (4.15 t ha-1), biological yield (7.42 t ha-1) and harvest index (43.03%) were also recorded in F5 (75% of RDF + poultry manure @ 2.5 t ha-1) treatment. While considering the interaction effects between the age of seedlings and nutrient management, transplanting 30 days old seedlings along with the nutrient management of 75% of RDF + poultry manure @ 2.5 t ha-1 treatment improved yield contributing parameters and provided the highest yield (3.76 t ha-1) of BRRI dhan34 compared to other treatment combination. So, the application of 75% of RDF + poultry manure @ 2.5 t ha-1 along with 30 days old seedlings appeared as a promising practice to obtain better performance of fine aromatic rice (cv. BRRI dhan34).

Seed priming influences on yield and protein content of wheat sown at different time

The aim of this field experiment conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, was to investigate the impact of different seed priming techniques and sowing dates on the yield and quality of wheat. The study aimed to identify the most effective seed priming technique and optimal sowing date to enhance wheat productivity and minimize yield reduction. The experiment employed a split plot design with two factors: seed priming techniques (no priming, hydropriming with distilled water, osmopriming with PEG, and halopriming with CaCl2) and sowing dates (November 20, December 05, and December 20). The trial was conducted from November 2019 to April 2020 at the research field. The study consisted of three replications for each treatment combination. Osmopriming exhibited the most favorable results among all priming techniques, showing significantly higher values for effective tillers hill-1 (3.91), number of grains spike-1 (43.82), number of spikelets spike-1 (16.16), grain yield (3.87 tons hectare-1), biological yield (6.02 t ha-1), and harvest index (39.03%). No priming condition resulted in the highest protein content (12.11%), while osmopriming had the lowest protein content (11.77%). The sowing conducted on November 20 yielded the highest number of effective tillers hill-1 (3.57), number of grains spike-1 (42.49), number of spikelets spike-1 (15.75), grain yield (3.71 t ha-1), biological yield (9.70 t ha-1), and lowest protein content (11.74%). Sowing on December 20 resulted in the highest protein content (12.20%). Based on the study's findings, it can be concluded that the osmopriming technique, combined with sowing on November 20, offers the most promising approach to mitigate the yield reduction of wheat. This combination demonstrated the highest grain yield (4.23 t ha-1) compared to other treatments. Therefore, farmers and agricultural practitioners are recommended to adopt the osmopriming technique with a sowing date of November 20 for optimizing wheat production and enhancing overall crop quality.

Influence of Nitrogen and Phosphorus on the Growth and Yield of Fine Aromatic Rice (cv. Binadhan-13)

Nitrogen and phosphorus are the essential nutrients involved in various physiological processes and affect the grain yield of rice. An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to find out how nitrogen and phosphorus affect the growth and productivity of fine aromatic rice. The experiment consisted of five levels of nitrogen viz. 0, 25, 50, 75 and 100 kg N ha-1 with four levels of phosphorus viz. 0, 15, 30, and 45 kg P2O5 ha-1. The experiment was set up using a randomized complete block design with three replications. According to the findings, the level of nitrogen, phosphorus and their interactions had a big impact on the yield and growth of aromatic rice. At harvest, the highest grain yield (4.15 t ha-1) was found in 75 kg N ha-1 which was identical with 100 kg N ha-1 while the lowest one was found in control (0 kg N ha-1). In case of phosphorus, 30 kg P2O5 ha-1 produced the maximum grain yield (3.73 t ha-1) compared to other treatments and the lowest grain yield was discovered in control (0 kg P2O5 ha-1). In interaction, the highest plant height (150 cm), number of effective tillers hill-1 (7.33), panicle length (24.00 cm), grains panicle-1 (136.9) and grain yield (4.37 t ha-1) were recorded in 75 kg N ha-1 × 45 kg P2O5 ha-1. Application of 75 kg N ha-1 along with 45 kg P2O5 ha-1 appears to be a promising combination for growing aromatic fine rice (cv. Binadhan-13).

Effect of Nitrogen Doses in Boro Rice Grown with Variable Levels of Floating Duckweed

An experiment was carried out at the Agronomy Research Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2018 to June 2019 to study the nitrogen requirement of boro rice grown with floating duckweed. The experiment was laid out in a Factorial Randomized Complete Block Design with three replications. The treatments were duckweed: viz. D0 = Control (0 g duckweeds m-2), D1 = 200 g duckweeds m-2, D2 = 400 g duckweeds m-2 and D3 = 600 g duckweeds m-2) and nitrogen treatment: N1 = 45 kg N ha-1, N2 = 90 kg N ha-1 and N3 = 180 kg N ha-1). Different doses of duckweeds showed significant influence on most of the parameters of which D2 (400 g duckweeds m-2) treatment the best performance on growth and yield parameters of rice. Among different doses of nitrogen, N2 (90 kg N ha-1) gave the best results on growth and yield parameters of rice. In case of combined effect, D2N2 showed the highest number of tillers hill-1 (16.40), dry weight hill-1 (48.97 g), number of effective tillers hill-1 (14.73) and number of grains panicle-1 (189.50). This treatment combination also showed the highest number of filled grains panicle-1 (183.90), panicle length (25.83 cm), 1000 -grain weight (25.13 g), seed yield (7.24 t ha-1), straw yield (8.47 t ha-1), biological yield (15.71 t ha-1) and harvest index (46.09%). On the other hand, D0N3 gave the least results on these parameters. Findings revealed that application of 400 g duckweeds m-2 with 90 kg N ha-1 showed the superiority over other treatment combinations to produce higher grain yield of boro rice.
 Bangladesh Agron. J. 2022, 25(2): 109-117

Performance of Aman Rice Varieties Under Different Nutrient Management

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July to December 2017 to investigate the combined effect of poultry manure with inorganic fertilizers on the yield of BINA developed transplant Aman rice varieties. The experiment comprised three varieties viz. Binadhan-15, Binadhan-16 and Binadhan-17 with five nutrient management viz. Control (no application of manures and fertilizers), 100% recommended dose of inorganic fertilizer (Urea-TSP-MoP-Gypsum-Zinc sulphate @ 150-110-70-60-5 kg ha-1) (RF), Poultry manure @ 5 t ha-1, 75% RF + poultry manure @ 5 t ha-1, 50% RF + poultry manure @ 5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. Number of total tillers hill-1 (13.37), number of effective tillers hill-1 (6.76), grains panicle-1 (107.86 cm), grain yield (6.97 t ha-1), straw yield (8.36 t ha-1), and harvest index (45.47%) were found to be the highest in Binadhan-17 and the highest weight of 1000-grain (27.32 g) was recorded in Binadhan-16. Among the nutrient management, 75% RF + poultry manure @ 5 t ha-1 exhibited its superiority to other treatments in terms of number of total tillers hill-1(11.74), grains panicle-1 (115.26), 1000-grain weight (23.49 g), grain yield (6.57 t ha-1) and harvest index (48.20%). The highest grain yield (7.10 t ha-1) was found in Binadhan-17 with 75% RF + poultry manure @ 5 t ha-1 and the lowest grain yield (5.32 t ha-1) was found in Binadhan-16 with control treatment. From the study, it can be concluded that Binadhan-17 fertilized with 75% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1 appears as the promising practice to obtain the highest grain yield.
 Bangladesh Agron. J. 2022, 25(2): 89-96

Assessment of combined effect of Eleocharis atropurpurea and Fimbristylis dichotoma residues on the yield performance of T. aman rice

The current agricultural system is seeking a biological solution to lesson hazardous impacts from the use of chemicals to control weeds in rice production. Plant allelopathy is one of the ways where allelopathic plant inhibits its surrounding plants by releasing allelopathic substances. The present experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to December 2019 to study the allelopathic effects of the and residues of Eleocharis atropurpureaandFimbristylisdichotomaonweedmanagementandtheyieldperformance of amanrice. The field experiment consisted of three rice varieties i.e BRRI dhan34, Nizershail and Kalozira and five treatments such as 0, 1.0, 2.0, 3.0 t ha-1and farmer’s practices. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The highest grain yield (4.44 t ha-1)as well as the yield contributing character was recorded in Kalozira and the lowest grain yield (3.94 t ha-1) was obtained in the BBRI dhan34. The highest number of effective tillers hill-1, number of grains panicle-1, 1000-grain weight, grain and straw yields were observed when the residue of E.atropurpureaandF.dichotomawas applied at 3tha-1.Ricecultivarkalozira with the incorporation of E. atropurpurea and F. dichotoma residue at 3 t ha-1produced the highest grain yield (5.08 tha-1) and straw yield (6.77 tha-1). Results of this study indicate that E. atropurpureaand F. dichotomaresidue showed potentiality to inhibit weed growth and it has a significant effect on yield of amanrice.

FFECT OF WEEDING REGIME ON THE PERFORMANCE OF DIRECT-SEEDED AUS RICE

A field experiment was conducted to find out the impact of weeding regime on the performance of three Aus rice. The experimental treatment consisted of three varieties of rice viz. BRRI dhan28, Bere Ratna and Kajol Lata, and four weeding regimes viz. no weeding, one hand weeding at 35 days after sowing (DAS), two hand weedings at 20 and 35 DAS and three hand weedings at 20, 35 and 50 DAS. The experiment was laid out in a factorial randomized complete block design with three replications. Eleven weed species belonging to five families infested the experimental plots; Cyperus rotundus L. and Imperata cylindrica (L.) Baeuv. were the dominant. The effect of weeding regime on weed density (except at 20 DAS) and weed dry weight was statistically significant. The results indicated that three hand weedings at 20, 35 and 50 DAS produced the highest number of effective tillers hill-1, number of filled grains panicle-1, 1000-grain weight and grain yield. Among the varieties Bere Ratna gave the highest grain yield.

Economic studies of quality rice (Oryza sativa L.) on different varieties under organic production system in Chhattisgarh

An experiment was conducted under Chhattisgarh agro-climatic conditions at the instructional cum research farm, Department of Agronomy, College of Agriculture, Indira Gandhi Agricultural University, Raipur (Chhattisgarh) entitled “Economic studies of quality rice (Oryza sativa L.) on different varieties under organic production system in Chhattisgarh.” The highest number of effective tillers hill-1 was recorded in the variety Zinco rice MS (10.7) which was significant superior over rest of the tested varieties. The lowest number of effective tiller hill-1 Lohandi (7.2) in over rest of the varieties. The highest length of panicle (32.9 cm) in Tulsi Manjiri while lowest length of panicle (21.1 cm) with Indira Sugandhit Dhan 1. The overall result also indicate that traditional rice varieties were produced the higher number of sound grains panicle-1 like Samund Chini (153.0) and Aatma Sheetal (152.7) over high yielding scented and fortified rice varieties while the lowest sound grains panicle-1 was recorded with Zinco rice MS (71.7) in overall tested varieties. The highest sterility percent was reported in Zinco rice MS (22.8%) but the lowest (9.8%) in Lokti Machhi. The highest test weight was noticed in CG Madhuraj 55 (32.9g) followed by Protezin (31.6g). The maximum grain yield was recorded in CG Devbhog (37.0 q ha-1) and lowest grain yield (22.6 q ha-1) in Tulsi Manjiri. The highest straw yield was recorded in the variety of Tulsi Manjiri (71-72 q ha-1) which differ significantly in rest over the varieties and lowest straw yield in the variety Protezin (33.9 q ha-1). The maximum value of harvest index recorded in the cultivars Protezin (49.1%) and the lowest harvest index value was recorded in the variety Tulsi Manjiri (24.3 %). The highest B: C ratio recorded the variety CG Devbhog (1.6) while the lowest in the variety Lohandi and Aatma Sheetal (0.8).

Performance of Transplant Aus Rice Varieties under Different Nitrogen Management Practices

Management of applied nitrogen in rice field is one tool that could lead to increase in rice yield, but often ignored by most farmers. The experiment was carried out from April to July 2015 at the Agronomy Field Laboratory of Patuakhali Science and Technology University, Dumki, Patuakhali to find out the influence of different nitrogen management and variety on the yield performance of transplant Ausrice. The study consisted of four levels of nitrogen viz. Control (without N), 30 kg N ha-1, 60 kg N ha-1 and urea super granule @ 52 kg N ha-1 and four Transplanted aus rice varieties viz. KaliHitta, ChaitaBoro, Abdul Hai and Gota IRRI, and was laid out in a split-plot design with three replications. The levels of nitrogen were assigned in the main plot and varieties were allocated in the sub-plots. Nitrogen management, variety and their interactions exerted significant (P ≤ 0.05) influence on plant characters, yield contributing characters and yield of transplanted Aus rice. In the case of nitrogen management, the tallest plant was 161.60 cm, maximum leaf area index(2.97, the highest number of effective tillers hill-115, longest panicle 24.30 cm with the maximum number of filled grains as94.73, 1000-grain weight gave 29.97 g. Grain yield of 2.48 t ha-1 were obtained from USG @ 52 kg N ha-1 and the shortest plant height of 136.90 cm with lowest leaf area index of 1.78, lowest number of effective tillers hill-1 (8.43), shortest panicle (18.84 cm) with the lowest numbers of filled grains panicle-1 (53.18), 1000-grain weight (24.33 g) and grain yield (1.40 t ha-1) were obtained in control (N1=O, kg N ha-1). Among the varieties, ChaitaBoro gave the tallest plant height (151.60 cm) and maximum leaf area index (2.54). While the highest number of effective tillers hill-1 (12.20), longest panicle (22.42 cm) with the maximum number of filled grains panicle-1 (73.50), highest 1000-grain weight (27.41 g) and highest grain yield (2.39 t ha-1) were recorded from Gota IRRI than other varieties. In case of interaction, Gota IRRI Fertilized with USG at 52 kg N ha-1 produced the highest number of effective tillers hill-1 (16.87), panicle length (25.13 cm), number of grains panicle-1 (105.70) and grain yield (3.13 t ha-1). The lowest number of effective tillers hill-1 (8.13), lowest panicle length (17.47 cm) with minimum numbers of filled grains 47.67) and grain yield (1.12 t ha-1) were produced by the interaction of control (N1=O, kg N ha-1) and Kali Hitta. So, cultivation of transplant Aus rice (Gota IRRI) appeared to be the best performance with USG @ 52 kg N ha-1 and recommended to the end users.

SEED GERMINATION BEHAVIOUR, SEEDLING GROWTH, MORPHO-PHYSIOLOGICAL AND YIELD ATTRIBUTES OF RICE GROWN IN CADMIUM-ADDED SOIL

An experiment was conducted to investigate the effect of different levels of cadmium (Cd) stress on germination, morphology, physiology and yield of rice. There were five treatments, viz. control (no Cd), 0.5 mM CdCl2, 1 mM CdCl2, 1.5 mM CdCl2 and 2 mM CdCl2, carried out by a randomized complete block design (RCBD) with three replications. Cadmium stress caused a significant reduction of plant height and tillers hill-1 in a dose-dependent manner. The highest decline of relative water content and SPAD value was found at 1.5 mM (11 and 16%) and 2 mM (14 and 19%) Cd stress compared to the control. The number of effective tillers hill-1, filled grains panicle-1, 1000-grain weight, length of panicle, grain yield and straw yield reduced significantly by 44, 32, 15, 24, 37 and 45%, respectively, over the control. Germination and seedling-related parameters were recorded 10 days after germination. The lowest germination percentage (27%), germination index (27%) and seedling vigour index (49%) were observed at the highest level of Cd stress in comparison to the control. Cadmium stress resulted in maximum abnormal seedlings and markedly reduced length of root and shoot as well as their fresh and dry weight. Root shoot ratio showed differential responses to Cd stress. Thus, it can be concluded that a higher level of Cd in soil has a detrimental effect on seed germination, morphology, physiology and yield of rice.

Effect of Variety and Planting Arrangement on Weed Control and Yield Performance of Transplanted Aman Rice

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June to November 2016 in order to find out the effect of variety and planting arrangement on weed control and yield performance of transplanted Aman rice. The experiment consisted of four varieties viz., Binadhan-7, Binadhan-12, Binadhan-17 and Binadhan-16 and five planting arrangement viz. 25cm × 20cm, 25cm × 15cm, 20cm × 20cm, 20cm × 15cm and 15cm × 15cm. The experiment was laid out in Split Plot Design with three replications. Results indicated that the highest weed density (90.93 m-2), weed biomass (131.87 gm-2), leaf chlorophyll content (SPAD value) (40.02), sterile spikelets panicle-1 (76.86) ,% sterility panicle-1 (28.66), grain yield (4.51 t ha-1) and straw yield (4.63 t ha-1) were obtained from Binadhan-17. The variety Binadhan-7 showed the best performance in respect of number of total tillers hill-1 (11.06), number of effective tillers hill-1 (10.12) compared to the other varieties used in the study. The highest leaf chlorophyll content (SPAD value) (36.48), plant height (99.72 cm), panicle length (22.03 cm), number of total tillers hill-1 (10.21) and number of effective tillers hill-1 (9.45) were found at 25 cm × 20 cm planting arrangement. The highest grain yield (4.31 t ha-1) was recorded from 20cm × 15cm planting arrangement. The interaction between variety and planting arrangement showed numerically higher grain yield (5.38 t ha-1) from Binadhan-7 at 20cm × 15cm planting arrangement, whereas the lowest grain yield (2.61 t ha-1) was achieved from the variety Binadhan-12 at 15cm × 15cm planting arrangement. It can be concluded that Binadhan-7 at 20cm × 15cm planting arrangement may be used for achieving the best yield with less weed interference in Aman season.

Growth and Yield Performance of Selected Wheat Genotypes at Variable Irrigation Management

Growth and Yield Performance of Selected Wheat Genotypes at Variable Irrigation Management

Influence of integrated use of cotton seed oilcake and mustard oilcake with chemical fertilizers on growth, yield and nutritional quality of rice

Cotton seed oilcake and mustard oilcake are excellent and high quality organic manures enriched with essential nutrient elements. A field experiment was carried out at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during boro season of 2019 to investigate the influence of cotton seed oilcake and mustard oilcake on yield attributes, yield, nutrient content and uptake by rice cv. BRRI dhan29. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications and seven treatments viz. T1: control, T2: 100% Recommended Fertilizer Dose (RFD), T3: 50% RFD, T4: 50% nitrogen (N) from RFD + 50% N from cotton seed oilcake, T5: 50% N from RFD + 50% N from mustard oilcake, T6: 50% N from RFD + 25% N from cotton seed oilcake + 25% N from mustard oilcake, T7: 50% N from cotton seed oilcake + 50% N from mustard oilcake. The maximum values of all the yield components viz. plant height, panicle length, number of effective tillers hill-1 and filled grains panicle-1 and yields (grain and straw) were found in treatment T2. The highest content and uptake of nutrients – N, P, K and S were also recorded in T2. The performance of T4 and T2 was statistically similar in producing yield parameters, grain and straw yields, nutrient contents and uptake by rice. Among the integrated approaches, the performance of T4 was the best as it produced the second highest grain yield of 6.24 t ha-1 and straw yield of 8.17 t ha-1 with higher nutritional improvement of rice. Application of cotton seed oilcake compensated up to 50% of chemical fertilizer. Therefore, considering the significance of organic manures and soil health, cotton seed oilcake should be considered for application in association with chemical fertilizers for yield enhancement and nutritional improvement of rice.
 Progressive Agriculture 31 (3): 144-153, 2020

Yield Enhancement of T. Aman Rice in Salinity Affected Area of Noakhali District of Bangladesh Through Adoption of Variety and Gypsum Fertilizer Application

An experiment was conducted in the farmer’s field at the Moddho Jutkhali village, Subornochar, Noakhali, a salinity affected area of Bangladesh to investigate the effect of variety and gypsum fertilizer on the yield of transplant aman rice under salinity condition during July to December, 2017. The experiment was laid out in a two factor split-plot design with three replications consisting of three aman rice varieties viz., Swarna (V1, an indian variety adapted to that locality), BRRI dhan52 (V2) and Binadhan-7 (V3) and three levels of gypsum fertilizer viz., 0, 75 and 150 kg gypsum ha-1. Yield components and yield of transplant aman rice were significantly influenced by variety, level of gypsum and their interactions. Among the varieties, Swarna produced the tallest plant height (126.7 cm), highest number of grains panicle-1 (76.30), weight of 1000 grains (25.80 g), grain yield (5.44 t ha-1), straw yield (7.07 t ha-1), and biological yield (12.51 t ha-1) while Binadhan-7 showed lowest values of these respective parameters but number of total tillers hill-1 (9.99) and number of effective tillers hill-1 (8.94) were maximum in Binadhan-7. Among three gypsum levels, most of the yield contributing characters showed highest values for 150 kg gypsum ha-1 that’s why grain yield was also highest (5.32 t ha-1) for this treatment. On the other hand lowest grain yield (4.92 t ha-1) was found when no gypsum was applied. In case of treatment interaction, highest number of grains panicle-1 (80.23) and highest grain yield (5.69 t ha-1) were produced when Swarna was cultivated with 75 kg gypsum ha-1 while lowest values of grain, straw and biological yields (4.36, 5.11 and 9.47 t ha-1, respectively) were found when Binadhan-7 was cultivated without applying any gypsum. Therefore, it can be concluded that the variety Swarna with 75 kg gypsum ha-1 can be practiced for the cultivation of transplant aman rice in the salinity affected area of Noakhali, Bangladesh to obtain the highest grain yield.
 Res. Agric., Livest. Fish.7(3): 363-371, December 2020

Effects of barley crop residues on weed management and grain yield of transplant Aman rice

The experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University during the period from July to December 2017 to evaluate the effect of barley crop residues on weed management and yield of transplant aman rice. The experiment consisted of three time of crop residue application viz. one week before transplanting, at the time of transplanting, at one week after transplanting and five doses of barley crop residues such as no crop residues, barley crop residues @ 0.5 t ha-1, barley crop residues @ 1.0 t ha-1, barley crop residues @ 1.5 t ha-1, and barley crop residues @ 2.0 t ha-1. The experiment was laid out in a split plot design with three replications. Weed population and weed dry weight were significantly affected by the dose and time of barley crop residues application. The minimum weed growth was noticed with the application of barley crop residues @ 2.0 t ha-1 at one week after transplanting and the maximum one was observed in no crop residues treatment at one week before transplanting. The highest values of percent weed inhibition was found with the application of barley crop residues @ 2.0 t ha-1 which were 48.13%, 41.39%, 39.71%, 39.88% and 38.73% for panikachu (Monochoria vaginalis), shama (Echinochloa crusgalli), chesra (Scirpus juncoides), amrul (Oxalis corniculata) and sabujnakful (Cyperus difformis), respectively. Rice grain yield and the yield contributing characters produced by the application of crop residues at one week before transplanting was the highest among different times of application and the highest reduction of rice grain yield was obtained in no crop residue treatment. The highest number of effective tillers hill-1, number of grains panicle-1, 1000-grain weight, rice grain and straw yields were observed when barley crop residues were applied @ 2.0 t ha-1 at one week before transplanting. Results of this study indicate that application of barley crop residues @ 2 t ha-1 at one week before transplanting showed the maximum suppression of weed growth. Therefore, barley crop residues might be used as an alternative tool for weed management in transplant aman rice.
 Progressive Agriculture 31 (2): 119-129, 2020

Yield contributing characters of BRRI dhan49 as influenced by integrated use of banana leaves with inorganic potassium fertilizer

A field experiment was carried out at the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh during aman season of 2014 to study the integrated use of banana leaves with inorganic potassium fertilizer on the growth and yield of BRRI dhan49 following Randomized Complete Block Design (RCBD) with eight treatments and three replications. The highest plant height (85.55cm), panicle length (21.46cm), number of effective tillers hill-1 (11.54), number of filled grains panicle-1 (149.53), 1000-grain weight (21.85gm), grain yields (5.66 t ha-1) and straw yield (6.81 t ha-1) were obtained in the treatment T3 and the lowest plant height (77.10cm), panicle length (18.85cm), number of effective tillers hill-1 (8.64), number of filled grains panicle-1 (112.11), 1000-grain weight (19.96gm), grain yields (3.50 t ha-1) and straw yield (4.73 t ha-1) were recorded in the control. It can be recommended to integrated use of 50% K from banana leaves+50% K from MoP on growth and yield of BRRI dhan49.  Â

Effect of rice residue on weed suppression and yield performance of boro rice

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from December 2017 through May 2018 to study the effect of rice residue on weed suppression and yield of boro rice. The experiment consisted of four different rice residue treatments such as no rice residue, 2.5, 5 and 7.5t ha-1rice residue, and five different herbicidal treatments such as no herbicide (H0), 25% of the recommended dose (RD), 50% RD, 75% RD and 100% of RD. The experiment was laid out in a randomized complete block design with three replications. Seven weed species belonging to five families infested the experimental plots. Weed density and weed dry weight were significantly affected by incorporation of rice residue and herbicidal treatment. The maximum weed growth was noticed with no rice residue incorporation and application of no herbicide. The minimum weed density and dry weight were found in incorporation of 5 t rice residue ha-1 and application of 100% of RD of herbicide treatment. Rice residue exerted significant effect on yield and yield contributing characters like plant height, number of total tillers hill-1, number of effective tillers hill-1 and grain yield. The highest grain yield (4.89 t ha-1) was recorded with the incorporation of 2.5 t ha-1 rice residue which was statistically identical with5 and 7.5 t ha-1 rice residues. The grain yield (5.70 t ha-1) produced by 75% of RD of herbicide was the highest among the other herbicidal treatments. The highest number of effective tillers hill-1 (12.80), 1000-grain weight (21.07), grain yield (5.87 t ha-1) and straw yield (7.21 t ha-1) were observed with the incorporation of 5 t rice residue ha-1 and 75% of the RD of herbicide treatment. Results of this study indicate that rice residue showed potentiality to inhibit the growth of weed and exerted significant effect on the yield of boro rice. Rice residue @ 5 t ha-1 with application of herbicide of 75% RD might be suggested to use for effective weed management and better grain yield of boro rice.

Weed management and crop performance of rice as influenced by different crop residues

To investigate the effect of different plant residues on weed inhibition and yield of transplant aman rice, an experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June 2017 to December, 2017. The experiment comprised of three rice cultivars i.e. BR11, BRRI dhan34 and BRRI dhan49 and five different plant residues treatment viz., no crop residues (control), soybean, wheat, bishkatali and sorghum crop residues @ 2.0 t ha-1 of each. The experiment was laid out following randomized complete block design with three replications. Weed population and weed dry weight were significantly affected by cultivars and crop residues treatment. The highest percent inhibition of 58.31%, 46.84%, 66.85%, 66.94% and 57.6% was in Panikachu (Monochoria vaginalis), Shama (Echinochloa crusgalli), Chesra (Scirpus juncoides), Sabujnakful (Cyperus difformis) and Amrul (Oxalis corniculata), respectively caused by sorghum crop residues. The grain yield, as well as the yield contributing characters produced by BR11,was the highest among the studied varieties. The highest number of effective tillers hill-1 (8.41), number of grains panicle-1(118.08) and 1000-grain weight (20.54 g) were observed in sorghum crop residues. BR11 under sorghum crop residues @ 2.0 t ha-1 produced the highest grain (5.76 t ha-1) and straw yield (6.39 t ha-1). So, to reduce herbicide use in the present situation of Bangladesh, natural herbicide or crop residues like sorghum might be used as an alternative way for weed management for effective and sustainable rice production.