Effect Of Nitrogen Levels Research Articles

Effect of Different Kharif Paddy Straw Management Options and Different Levels of Nitrogen on Soil Dehydrogenase and Urease Activity

A field experiment was conducted during rabi 2020-21, at Regional Agricultural Research Station, Polasa, Jagtial, PJTSAU to study soil dehydrogenase and urease activity as influenced by different kharif paddy straw management options and nitrogen levels. The results reveal that dehydrogenase and urease activity of soil was significantly influenced by paddy straw management options and activity was increased with crop duration up to 60 DAT and decreased after harvest. Dehydrogenase activity was reduced after burning (1.93 mg TPF produced g-1 soil d-1) as compared to the initial values (2.34 mg TPF produced g-1 soil d-1). The highest dehydrogenase activity of 3.74 and 3.54 mg TPF produced g-1 soil d-1 was recorded at 60 DAT in paddy straw incorporation with phosphorus and incorporation without phosphorus and decreased to 3.36 and 3.03 mg TPF produced g-1 soil d-1 after harvest respectively. Soil urease activity was showed an increasing trend with crop duration up to 60 DAT and then declined. Maximum activity of 3.05, 4.84, 5.17 mg NH4+ released g-1 soil h-1 was observed at 60 DAT under paddy straw burning, paddy straw incorporation with phosphorus incorporation without phosphorus respectively. Paddy straw incorporation with phosphorus recorded higher urease activity and paddy straw burning recorded lower urease activity at all the intervals of crop growth. The effect of nitrogen levels on soil urease activity was found to be significant. Soil urease was highest with 120% RDN followed by 115% RDN, followed by 110% RDN, followed by 100% RDN and the similar trend was observed at all the intervals of crop growth.

Effect of nitrogen levels and foliar application of nano-urea on productivity of pearl millet [Pennisetum glaucum (L.) R.Br. emend Stuntz

Effect of nitrogen levels and foliar application of nano-urea on productivity of pearl millet [Pennisetum glaucum (L.) R.Br. emend Stuntz

Optimizing Banana Crop Productivity: Effects of Nitrogen Levels and Plant Growth Regulators on Chlorophyll Dynamics in Ney Poovan Cultivar

The present study highlights the Effect of different nitrogen levels and plant growth regulators on Total chlorophyll content and chlorophyll stability index of banana cv. Ney Poovan. A field experiment in banana cv. Ney Poovan was conducted with various levels of nitrogen and plant growth regulators at Orchard, Tamil Nadu Agricultural University, Coimbatore. The experiment was laid out in the complete Randomized Block Design with four main plot and eight sub plot treatments which are replicated thrice. Significant differences among the different treatments in growth and physiological parameters was observed. The results reveled that application of various levels of nitrogen and plant growth regulators 200 g N plant-1 (60g + 100g + 40g N plant-1 at 3,5 and 7 MAP respectively + Urea 2% foliar spray + Salicylic acid (SA) 100 ppm @ 3,5 and 7 MAP respectively i.e. M4S5 recorded the highest chlorophyll content (1.40 mg g-1) and chlorophyll stability index (72.58) which was on par with the M3S5 : 200 g N plant-1 (60g + 100g + 40g N plant-1 at 3,5 and 7 MAP respectively)+ Salicylic acid (SA) 100 ppm @ 3,5 and 7 MAP.

Effect of nitrogen levels and green manuring on grain and straw yield in Basmati rice varieties

Effect of nitrogen levels and green manuring on grain and straw yield in Basmati rice varieties

Effect of Nitrogen Levels on the Growth and Yield of Barley (Hordeum vulgare L.) Varieties

A field experiment entitled “Effect of nitrogen levels on the growth and yield of barley (Hordeum vulgare L.) Varieties” was carried out during the Rabi season of 2021-22 near the polyhouse research farm of wheat, barley, and mustard section, ITM University, Gwalior. The experiment was carried out in a randomized block design with three replications. Twelve treatments consist of four levels of nitrogen (0, 40, 80, and 120 kg N ha-1) and three barley varieties (RD-2035, KBS-D-341, and BH-393). Results indicated that the application of different nitrogen levels and varieties had significant effects on plant growth parameters such as plant height, number of tillers, leaf area, and dry matter accumulation. Increased levels of nitrogen considerably influenced the yield characters and were maximum when 120 kg N ha-1 was applied; however, it was at par with 80 kg N ha-1. The highest grain yield (4312.23 kg ha-1) was recorded with the application of 120 kg N ha-1 which was significantly higher as compared to lower levels (0 and 40 kg N ha-1) of nitrogen except for 80 kg N ha-1.The application of 40, 80, and 120 kg N ha-1 increased the grain yield by 57.13, 73.48, and 74.29 per cent, respectively over 0 kg N ha-1. Among varieties, KBS-D-341 produced maximum plant height, number of tillers, leaf area, and dry matter accumulation compared to other varieties. It also recorded a maximum grain yield, no. of effective tillers, no of grains per spike, and 1000 grain weight. This was followed by the variety BH-393 and RD-2035 performed poorly. In terms of economics KBS-D-341 obtained maximum net returns of (Rs. 88887.05 ha-1) with a BC ratio of (2.11) at 80kg N ha-1 as compared to other varieties.

Effect of Nitrogen Levels on Growth, Yield Attributes and Yield of Hybrid Varieties of Rice (Oryza sativa L.)

A field experiment was conducted to evaluate the effect of different Nitrogen levels on the yield performance of four rice hybrid in two consecutive Monsoon Season of 2020 and 2021. The experiment was conducted at Agronomy Research Farm, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj Ayodhya (U.P.). The experiment was conducted in factorial randomized block design with three replication which comprised of 4 levels of nitrogen viz. 0% RDN, 50% RDN, 75% RDN and 100% RDN and 4 hybrid varieties viz. Arize-6444 Gold, Ankur-7576, 27P31 and Shahi-Dawat. Results revealed that significantly higher yield contributing characters and yield was obtained at 100% of RDN (150 kg N ha-1) which is at par with 75 % RDN (112 kg N ha-1) and significantly superior over 0% of RDN and 50% of RDN (75kg N ha-1). The growth parameters, yield attributes and yield were recorded significantly higher with Ankur-7576 variety except length of panicle (cm) and test weight (g). Ankur-7576 gave good response in low doses of nitrogenous fertilizer and showed good efficiency in utilization of available and applied nitrogen to the crop and best suitable for obtaining higher yield of hybrid rice.

Effect of Nitrogen Levels and Seaweed Extract (Kappaphycus alvarezii) on Growth and Yield of Summer Maize (Zea mays L.)

The trail was conducted in Crop Research Farm, Department of Agronomy of Naini Agricultural Institute, SHUATS, Prayagraj (U.P), during Zaid 2022. The experiment consists of three Nitrogen levels i.e., 50%, 75% and 100% N along with Seaweed extract (Kappaphycus alvarezii) applied at different Concentration i.e., 5%, 10% and 15%. The experiment was laid out in Randomized block Design with ten treatments each replicated thrice. The results showed that plant height (165.73 cm) and dry weight (88.13 g/plant), were recorded significantly highest in the treatment 7 which is with the application of 100% Nitrogen + 15% K-sap as compared to all other treatments. The significantly highest number of cobs/plant (3), number of rows/cob (14.47), grains/row (28.27), grain yield (4.05 t/ha), stover yield (15.37 t/ha), and seed index (26.2) were recorded with application of 100% Nitrogen + 15% K-sap as compared to all other treatments.

Effect of nitrogen levels on yield of rice varieties during kharif in South Odisha

A field experiment was conducted at Experimental Farm of M. S. Swaminathan School of Agriculture, Paralakhemundi during kharif season of 2021 in south Odisha to study the effect of different nitrogen levels on the rice varieties. The experiment was laid out in a split plot design with three rice varieties, namely MTU 7029 (Swarna), BPT 5204 (Samba Mahsuri) and BPT 3291 (Sona Mahsuri) in main plots and four levels of N (0, 50,100 and 150 kg N/ha) in sub plots. The plant height and dry matter, yield attributes and grain yield were significantly higher in variety MTU 7029 (Swarna) over BPT 5204 and BPT 3291 (Sona Mahsuri). Application of 100 kg N/ha recorded significantly higher yield over 0, 50 and 150 kg N/ha. Application of 100 kg N/ha to variety BPT 5204 was found suitable for getting higher yield in southern Odisha in kharif season.

Effect of Nitrogen Levels and Planting Methods on Growth and Yield of Black Rice (Oryza sativa L.)

Background: Compared to other types of rice, black rice has the highest protein content vitamins and minerals. Black rice contains essential amino acids like lysine, tryptophan; vitamins such as vitamin B1, vitamin B2, folic acid; and it is a good source of minerals including iron, zinc, calcium, phosphorus and selenium.
 Objectives: Impact of nitrogen levels and planting methods on black rice growth and production.
 Methods: A field experiment was conducted during kharif season of 2021, at crop research farm of Department of Agronomy at Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj in North Eastern plains of Eastern Uttar Pradesh. under randomized block design comprising of 9 treatments of which treatments (T1-T9) with different combination of nitrogen along with different planting meathods which are replicated thrice.
 Conclusion: The treatment Nitrogen at 75 kg/ha nitrogen + SRI method recorded maximum. Plant height (118.13 cm), number of tillers/hill (11.00), plant dry weight (31.62 g/plant), number of panicles per hill (10.83), number of grains per panicle (196.70), number of filled grains per panicle (116.33), grain yield (4.61 t/ha) and straw yield (11.38 t/ha). Because the findings are based on research conducted during a single season, they may be repeated for further confirmation.

Effect of nitrogen levels and harvest timing on growth, yield and quality of lettuce under floating hydroponic system

Nitrogen (N) supply and harvest timing through ‘reaping and re-growth’ method are critical determinants of yield and quality in hydroponically grown leafy vegetables. Lettuce (Lactuca sativa L.) was chosen as a test crop for evaluating the effect of nitrogen applications and harvesting times. In India, farmers often apply N without guidance and improperly harvest leafy vegetables. Therefore, it is essential to determine the optimum N supply and harvesting time for yield and quality enhancement of hydroponically grown lettuce. We studied the effect of different levels of N (4, 6, 8 and 10 mmolL−1) and two harvest timings on the growth attributes and quality of lettuce. The higher N levels (10 and 8 mmolL−1) showed pronounced positive effects on growth, yield, and quality of lettuce. However, the dry matter yield and ascorbic acid content decreased with the increase in N levels. For a continuous supply of fresh cut leaves of lettuce and to optimize leaf nitrate content, the plants has to be harvested by adapting cut and come again method during winter season. The average growth rate, showed significant positive response to N. The present study demonstrates that optimum levels of N (10 mmolL−1) and harvest through cutting (after 45 days of harvesting) significantly increase the leaf yield and quality of the lettuce.

Effect of Nitrogen Levels on the Growth and Yield of Spring Maize

The research entitled the "Effect of different nitrogen levels on the growth and yield of spring maize" was conducted in the agriculture research farm of Lovely Professional University, Phagwara. Three different doses of nitrogen was used at different concentrations from lowest to highest. The doses of Nitrogen are denoted as N1, N2 and N3 viz 80kgN2ha-1, 120 kg N2ha-1and 160 kg N2ha-1 respectively. All the doses of nitrogen are compared with each other for the measurement of morphological parameters like plant height, the number of leaves and dry weight accumulation. In yield parameters, the grain yield, test weight, stover yield and shelling percentage was calculated. From the experiment, it was observed that the highest results were found in the treatment with the highest nitrogen dose with 160 Kg N/ha. The morphological parameters like plant height, number of leaves per plant and dry weight accumulation were found highest in N3 which is 160Kg N/ha. The yield parameters like grain yield, shelling percentage, stover yield and test weight are also found high in the treatment with the application of the highest amount of nitrogen that is 160Kg N/ha. From this research, the best results are provided by N3 which is 160 Kg N/ha, after that the moderate results are provided by N2 which is 120Kg N/ha and the least results were provided by N1 which is 80Kg N/ha.

Nitrogen and weed management effects on weeds and yield of barley in Kandahar, Afghanistan

Growth and yield of barley (Hordeum vulgare L.) are highly influenced by nutrients and weed management. Nitrogen (N) is the most crucial nutrient to which barley crop responds readily. Efficient management of N and weeds can provide higher yield, better quality, and higher income to the farmers. Therefore, a field experiment was conducted in a split-plot design with three replications during winter season of 2019-20 in the Afghanistan National Agricultural Sciences and Technology University (ANASTU), Kandahar, Afghanistan to evaluate the effect of weed and N management on weeds growth and barley productivity. There were three weed management options in main plots, such as weedy check, herbicide use alone [post-emergence application (PoE) of clodinafop-propargyl 60 g/ha + metsulfuron-methyl 4 g/ha (tank-mix) at 30 days after sowing (DAS)], and integrated weed management (IWM) involving stale seed bed 15 days before sowing + wheat crop residue (2.5 t/ha) retention + clodinafop-propargyl + metsulfuron-methyl (tank-mix) PoE with half of the recommended dose at 30 DAS]. Four N levels (~0, 40, 80 and 120 kg N/ha, i.e., N0, N40, N80 and N120) were included as sub-plot treatments. The IWM led to significantly lower density and biomass of weeds at 40 and 70 DAS and significantly increased weed control efficiency (WCE) and weed control index (WCI). Clodinafop-propargyl (60 g/ ha) + metsulfuron-methyl (4 g/ha) (tank-mix) PoE also resulted in significantly lower density and biomass of weeds and higher WCE and WCI than weedy check at all stages. IWM being at par with clodinafop-propargyl + metsulfuron-methyl (tank-mix) PoE led to higher growth (crop height, dry weight, leaf area index and growth rate) and yield of barley. On the contrary, the effect of nitrogen levels was not significant on the weed density and biomass reduction. N120 and N80 were comparable with respect to growth, yield attributes and yield of barley. Thus, IWM with 80 kg N/ha may be recommended for better weed management and higher barley yield and income in Kandahar, Afghanistan.

Effects of nitrogen application on phytochemical component levels and anticancer and antioxidant activities of Allium fistulosum.

BackgroundAllium fistulosum L. has good nutritional value and is cultivated worldwide as an efficacious traditional medicinal plant. Its biological activities are attributable to its phytochemicals. Nitrogen is an essential nutrient for plant growth and development; however, the effect of nitrogen levels on the level of active components in this species is not well understood.MethodsIn this study, using urea fertilizer, we investigated the effects of different nitrogen levels (N0, N1, and N2 at 0, 130, and 260 kg/ha, respectively) on the phytochemical constituents , and antioxidant and anticancer properties of A. fistulosum.ResultsThe results suggested that nitrogen fertilizers have a significant effect on the level of total phenols and flavonoids. The analysis of the antioxidant capacity revealed that the lowest IC50 values corresponded to plants treated with the highest nitrogen concentration. Anticancer activity was investigated against cancer cell lines (HeLa and HepG2), and the extracts of A. fistulosum treated with a high nitrogen level showed the highest antiproliferative effect. Collectively, our results suggest that nitrogen fertilizer application enhanced the quality of A. fistulosum, particularly its health benefits.

Effect of nitrogen levels on growth, yield, nitrogen uptake and economics of rice variety BPT 2782- Bhavathi

A field experiment was conducted during kharif, 2018 and 2019 at Agricultural Research Station, Bapatla to evaluate the effect of different nitrogen levels on growth, yield attributes and yield of rice variety BPT 2782-Bhavathi. The experiment was laid out in a randomized block design with 7 treatments replicated thrice. Seven levels of nitrogen (80, 120, 160, 200, 240, 280 and 320 kg N ha-1) were used as an experimental treatments. The results revealed that application of 200 kg N ha-1 recorded significantly the highest yield attributing characters like productive tillers plant-1, panicle length, number of filled grains per panicle and grain yield (5688 and 5625 kg ha-1) while lowest yield (4875 and 4860 kg ha-1) was recorded with 80 kg N ha-1 treatment. Highest net returns and benefit cost ratio was recorded with 200 kg N ha-1 during both the years 2018 and 2019. It can be indicated that application of 200 kg N ha-1 is more economical to the BPT 2782 long duration variety in both the years of experimentation. A linear increase in grain yield was observed with continuous rate increase of nitrogen from 80 to 200 kg ha-1.

Effect of Nitrogen Levels on Spring Maize in Relation to Mulching Materials in Central Inner Tarai of Nepal

The effect of different mulching materials and varying nitrogen fertilizer levels on growth, yield attributes, and yield of open-pollinated maize variety aiming at yield improvement was studied in inner Terai of Nepal through a field experimentation in 2019. The treatments included were the combinations of three mulching materials, (a) plastic mulch, (b) straw mulch, and (c) no mulching; and four nitrogen levels (0, 50, 100, and 150 kg ha-1) arranged in a split-plot design with four replications. Data on growth, yield attributes, and yield were taken and analyzed by using R Studio. The higher (p<0.05) heat use efficiency was recorded under plastic mulch and the higher levels of nitrogen application. The number of kernels per cob and thousand kernel weight were higher (p<0.05) in mulch treatments and higher nitrogen levels. Both the barrenness and sterility percentage were higher (p<0.05) for the 0 kg N ha-1 and reduced (p<0.05) by the nitrogen application of ≥100 kg ha-1. Increased tasseling-silking interval increased (p<0.05) the sterility and grain filling duration and increased (p<0.05) the grain yield. Due to the better yield attributes, the grain yield of mulch applied treatments and application of ≥100 kg N ha-1 were higher (p<0.05) than the no mulch and ≤50 kg N ha-1, respectively. The yield was hampered more by barrenness than by sterility. The effect of nitrogen levels on grain yield followed the quadratic relationship; 104 kg and 129-130 kg N ha-1, respectively for no mulch and mulching treatments which are estimated as economic levels of nitrogen fertilizers for open-pollinated spring maize under the central inner Terai environment.

Effect of nitrogen on growth and yield of short duration transplanted inbred and hybrid rice varieties

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June to December 2015 with a view to finding out the effect of nitrogen levels on the yield performance of short duration inbred and hybrid transplant rainy season rice varieties. Four short duration rice varieties (three inbred viz. BINA dhan7, BRRI dhan39, BRRI dhan56 and one hybrid Dhanigold), and 5 levels of nitrogen viz. 0, 40, 80, 120 and 160 kg N ha-1 were included in the experiment under a split–plot design with three replications. The result revealed that variety, nitrogen rate and their interactions had significant on grain yield of short duration transplant rainy season rice. Hybrid variety Dhanigold gave the highest yield (5.13 t ha-1) followed by BRRI dhan56 (4.80 t ha-1) while the lowest was produced by Binadhan-7 (4.28 t ha-1). The highest yield (5.93 t ha-1) was obtained from Dhanigold with 120 kg N ha-1 which was followed by BRRI dhan56 at 120 kg N ha-1 (5.42 t ha-1). The highest yield was attributed to the increased production of effective tiller and grains panicle-1. The optimum dose of nitrogen estimated for Binadhan-7, BRRI dhan39, BRRI dhan56 and Dhanigold are 131.31, 122.97, 126.50 and 133.14 kg ha-1, respectively. Thus, this study concludes that the highest yield of short duration rice varieties Binadhan-7, BRRI dhan39, BRRI dhan56 and Dhanigold could be obtained by applying nitrogen at 131.31, 122.97, 126.50 and 133.14 kg ha-1, respectively.

Effects of Nitrogen Level and Soil Moisture on Sweet Potato Root Distribution and Soil Chemical Properties

A culture pot experiment with sweet potato was conducted to investigate the influence of nitrogen (N) variation on fibrous root growth and storage root differentiation under two levels of soil moisture. Sweet potato plants were supplied with low N (N0, no supplemental N), medium N (N75, 75 mg kg−1), or high N (N150, 150 mg kg−1) under normal water supply (field capacity 75%) or drought (field capacity 50%) conditions. The results indicated that during storage root formation, sweet potato root biomass and storage root differentiation were greater in N75. But high N application inhibited storage root differentiation, root biomass, and morphological traits decreased sharply under drought conditions. Under normal water supply, medium N application promoted a uniform distribution of roots in the 0–30-cm soil layer, whereas excessive N application resulted in roots being distributed mainly on the surface of the soil. Water stress increased deep root growth under the N0, significantly decreased deep root growth under the N150. Under drought stress, the N75 improved the plasticity of the root system and increased Fv/Fm, qP, ETR, and PIABS, which alleviated the effect of drought stress on root growth and maintained the functioning of photosystem II. However, high N affected the pH and EC in the soil layer and was not conducive to root development. All of these results indicate an association between variation in N application and the architectural attributes of sweet potato root. This information has great importance for complete N evaluation to improve root plasticity and drought resistance in sweet potato.

Effects of nitrogen level on structural and functional properties of starches from different colored-fleshed root tubers of sweet potato

The nitrogen (N) influences the growth of sweet potato. However, it is unclear whether the different levels of N can affect starch physicochemical properties. In this study, 9 different colored-fleshed sweet potato varieties were planted in the same field with additional N fertilizer treatment of 0, 15 and 30 kg/ha. The physicochemical properties of starches from root tubers were measured. With increasing N level, the amylose content decreased in yellow-fleshed variety Sushu 16 and increased in white-fleshed variety Sushu 29 and purple-fleshed varieties Ningzishu 1 and 4, but did not significantly change in other varieties. The starch size decreased in purple-fleshed variety Ningzishu 1 and white-fleshed varieties Sushu 28 and Sushu 29 with increasing N treatment, but first increased then decreased in yellow-fleshed variety Sushu 16 and first decreased then increased in white-fleshed variety Sushu 24 and yellow-fleshed variety Sushu 25. The different levels of N treatment had no influence on protein content, crystalline structure, and gelatinization enthalpy of starch. The effects of N treatment on gelatinization temperatures and pasting viscosities of starches were determined by varieties and genotype backgrounds of sweet potato. The PLSR and PLS-DA were also carried out based on structural, thermal, and pasting parameters of starches.

Effect of nitrogen levels on growth and development of three Lisianthus (Eustoma grandiflorum (Raf.) Shinn) cultivars pot-planted in Ho Chi Minh City

Lisianthus (Eustoma grandiflorum (Raf.) Shinn) is favored in decoration because of its long-lasting and colorful flowers. The objective of the experiment was to evaluate the effects of different levels of nitrogen on the growth and development of three Lisianthus cultivars pot-planted in Ho Chi Minh City. The experiment was laid out in split - plot design (SPD) with four levels of nitrogen (3; 4; 5; 6 g/pot) being the main factor and three Lisianthus cultivars (Pink; Yellow; White/Purple) being the subordinate factor. Each pot was planted with one plantlet. The results indicated that plants applied with 4.0 g nitrogen per pot gave the best performance in plant height (18.41 cm) and number of leaves (24.08 leaves/plant) at 60 days after planted (DAP). The Pink cultivar reached the highest plant height (19.92 cm), number of leaves (43.53 leaves/plant) as well as number of flowers buds (12.31 buds/plant). The Pink cultivar, when applied with 4.0 g nitrogen/pot, gave the highest plant height (21.38 cm) at 60 DAP.

Effect of different nitrogen levels on crop growth of various rice cultivars

An experiment were done to analyze the effect of different nitrogen levels on crop growth of various rice cultivars with different rice varieties. Six cultivars from rice (Naveen, Indira, Ratna, Surendra, Birupa and Daya) were evaluated in the kharif season 2017-2018. The experiment were conducted in factorial randomized block design with three replications. Among the cultivars of rice, the effect of nitrogen levels on crop growth rate found to be proportional till the vegetative stage and then diminishing effect on crop growth rate is observed during reproductive stage. The highest CGR was observed in naveen and birupa and lowest in daya and surendra