Growth Of Okra Research Articles

Rock Phosphate and Manures with Phosphorus Solubilizing Bacteria Increases the Growth, Yield and Phosphorus Uptake of Okra (Abelmoschus esculentus)

Phosphorus (P) is one of the most important plant nutrient for increasing soil productivity and sustainable crop production. A pot experiment was conducted to study the effect of seed inoculation by phosphorus solubilizing bacteria (PSB) and organic and mineral P fertilizers on growth, yield and P uptake of okra. Phosphorus was applied at the rate of 90 kg ha-1 in the form of poultry manure (PM); sheep manure (SM) and rock phosphate (RP). Nine treatments were allocated for the experiment having PM, SM and RP alone, organic manures with RP in combination, or a mix of the three with PSB. The result revealed that sole application of SM at three growth stages gave maximum root and shoot growth, which was 75 and 78% more from control respectively. It is concluded that Leaf area (36%), chlorophyll contents (62%), yield (60%) and P uptake (31%) of okra were significantly enhanced by the integrated use of PM+SM+RP+PSB at all growth stages over control. Complementary application of this inoculants with manures and RP most favored okra growth and yield and can be considered as an appropriate substitute for chemical P fertilizer in organic and sustainable agricultural system.

Effect of Pig manure rates on performance of okra (Abelmoschus esculentus L. Moench) and Podagrica uniforma Jacq. Infestation in South Western Nigeria

Insect infestation and low soil fertility are the major constrictions in okra production and various tactics have been recommended for increased production. An experiment was conceived to explore the effects of different levels of pig manure on the performances and severity of damage caused by Podagrica uniforma Jacq. infestation on okra in South Western, Nigeria. The research was arranged in Randomized Complete Block Design (RCBD) with four treatments (0 t.ha-1, 5 t.ha-1, 10 t.ha-1, 15 t.ha-1 and 20 t.ha-1) replicated thrice. Okra growth, fruit yield, insect population and severity of damaged leaves were assessed and exposed to the Analysis of Variance, and Duncan Multiple Range Test (DMRT) at a 5 % level of significance was used to separate significant treatment means. The study outcomes revealed that okra growth and yield parameters were directly proportional as the pig manure rates increase. A similar trend was equally recorded for P. uniforma population in okra plants enriched with variable rates of pig manure, okra supplied with 20 t.ha-1 of pig manure exhibited the highest growth, yield performance and P. uniforma population. While the severity of leaf damage caused by P. uniforma was in descending order, very low in okra enriched with varying levels of pig manure as compared to the damage recorded in control. The trial showed that okra growth and yield was significantly (p<0.05) enhanced by the application of 20 t.ha-1 pig manure with a resultant reduction in the severity of damaged leaves caused by P. uniforma infestation.

Influence of reasoned organic and inorganic fertilization on okra (Abelmoschus esculentus) growth, productivity, and profitability on degraded sandy soil in South Togo

Reasoned fertilization practices promote fertilizers formula adjusted to the crop’s needs and increase production and income. In this study, two agronomic tests were carried out on two sites named Tabligbo (site 1) and Djikame (site 2) on degraded sandy loam soils situated in the south of Togo using inorganic and organic fertilizer quantities obtained from reasoned fertilization. An indigenous variety of Abelmoschus esculentus was used and five treatments were applied: T2: mineral fertilizer (667 kg/ha), T3: waste compost (6126 kg/ha at Tabligbo and 7260 kg/ha at Dzikame), T4: mineral (333.50 kg/ha) + compost fertilizers (3063 kg/ha for site 1 and 3630 kg/ha for site 2), control (T0) and smallholder farmers’ old fertilization practices (T1). At Tabligbo, treatments T2 and T4 stimulated quick growth (74,5 ± 03.50 cm) and the highest number of fruit was obtained on T4 treatment (102 ± 09). At Djikame, treatments T2 and T3 presented the highest growth (65.82 ± 2.51 cm) and the T4 treatment gave the best number of fruits (72 ± 4.00). Economic Efficiency and Cost-Value Ratio were high on the T4 formula on Tabligbo soil (53.48% and 1.85). At Djikame, treatment T2 presents the highest value of economic parameters (24.52% and 01.35). Among treatments tested, T4 (compost + mineral fertilizer) is the effective treatment on Tabligbo sandy loam soil for okra production while the T2 (mineral fertilizer) option is the best for okra production on site 2 due to the low content in nitrogen increasing C/N ratio. The effective fertilizer formulas discovered in this study will be shared with farmers in the study areas in order to improve market garden crop production in South Togo.

Improving the genetic potential of okra (Abelmoschus esculentus L.) germplasm to tolerate salinity stress

Okra (Abelmoschus esculentus L.) is the most consumed vegetable worldwide with the potential for diverse ecological adaptation. However, increasing salinization and changing climatic conditions are posing serious threats to the growth, yield, and quality of okra. Therefore, to mitigate increasing soil salinization and ensure sustainable okra production under rapidly changing climatic conditions, evaluation of new okra germplasm to develop salt tolerant cultivars is direly needed. The present study was designed to evaluate the genetic resources of okra genotypes for salt tolerance at growth and reproductive phases. Based on mophological and physio-biochemical responses of plants under stress condition, genotypes were divided into salt tolerant and succeptible groups. The experiment was comprised of 100 okra genotypes and each genotype was grown under control conditions and 6.5 dS m−1 NaCl concentration in a pot having 10 kg capacity. The experiment was conducted in a completely randomized design and each treatment was replicated three times. The results showed vast genetic variability among the evaluated okra germplasm traits like days to emergence, pod length, pod diameter, plant height, stem girth, and other yield-related parameters. Correlation analysis showed a highly significant positive association among the number of leaves at first flower and plant height at first flower.Likewise, pod weight also revealed a highly significant positive relationship for pod weight plant-1, pod length, and K+: Na+. Principal Component Analysis (PCA) revealed that out of 16 principal components (PCs), five components showed more than one eigenvalue and the first six PCs contributed 67.2% of the variation. Bi-plot analysis illustrated that genotypes 95, 111, 133, 99, and 128, under salt stress conditions, exhibited both high yield per plant and salt-tolerant behavior in other yield-related traits. On the basis of all studied traits, a salt susceptible group and a salt-tolerant group were formed. The salt tolerant group comprised of 97, 68, 95, 114, 64, 99, 111, 133, 128, and 109 genotypes, whereas, the salt susceptible group contained 137, 139, 130, 94, and 125 genotypes. Salt-tolerant okra genotypes were suggested to be used in further breeding programs aimed to develop salt tolerance in okra. These insights will empower precision breeding, underscore the importance of genetic diversity, and bear the potential to address the challenges of salt-affected soils while promoting broader agricultural resilience, economic prosperity, and food security.

Control of copper-induced physiological damage in okra (Abelmoschus esculentus L.) via Bacillus subtilis and farmyard manure: A step towards sustainable agriculture

Copper (Cu) stress is a serious problem in contaminated soils that causes significant reduction in okra growth and production. To determine the toxic effect of Cu on okra plant and identify an effective way to mitigate Cu toxicity on okra, seeds of okra were inoculated with Bacillus subtilis and sown with farmyard manure. There were 13 treatments (T0= Control, T1= 400 mg kg−1 of soil Cu, T2= 400 mg kg−1 of soil Cu+ B. subtilis, T3= 400 mg kg−1 of soil Cu+ FYM, T4= 400 mg kg−1 of soil Cu+ B. subtilis+ FYM, T5= 450 mg kg−1 of soil Cu, T6= 450 mg kg−1 of soil Cu+ B. subtilis, T7=450 mg kg−1 of soil Cu+ FYM, T8=450 mg kg−1 of soil Cu+ B. subtilis+ FYM, T9=500 mg kg−1 of soil Cu, T10=500 mg kg−1 of soil Cu+ B. subtilis, T11=500 mg kg−1 of soil Cu+ FYM, T12=500 mg kg−1 of soil Cu+ B. subtilis+ FYM) planned with the complete randomize design (CRD). Results of this research reveal that the okra production and soil physiological properties decreased with the addition of Cu in the soil, this is a new approach for sustainable crop production under Cu stress condition. 500 mg kg−1 of Cu in the soil have the more negative effect on plant growth but negative effect of Cu can be control with the addition of B. subtilis and FYM. Combine application of B. subtilis and FYM improve the soil properties and plant growth by improving the microbial activities, nutrients availability in the soil and production of growth hormones.

KONSENTRASI DAN FREKUENSI PEMBERIAN PUPUK MAJEMUK BERTEKNOLOGI NANO UNTUK MENINGKATKAN PERTUMBUHAN DAN HASIL PANEN TANAMAN OKRA (Abelmoschus esculentus)

Okra (Abelmoschus esculentus) is a tropical vegetable with numerous benefits that can adapt to tropical climates. Meeting the demand for okra requires a technological package to enhance its crop yield. One approach to improving okra yield involves the use of economically efficient nano-technology compound fertilizers, which enhance nutrient absorption by plants through direct nutrient release absorbed by the plant roots. This research aims to investigate the interaction between the concentration and frequency of nano-technology compound fertilizer application on the growth and yield of red okra (Abelmoschus esculentus). The study employs a two-factor randomized block design. The first factor involves different concentrations of nano-technology compound fertilizer with four treatments: P1: 2 ml/L, P2: 4 ml/L, P3: 6 ml/L, and P4: 8 ml/L. The second factor pertains to the frequency of nano-technology compound fertilizer application with three treatments: S1: Irrigation once a week, S2: Irrigation twice a week, and S3: Irrigation thrice a week. Each treatment consists of three replications. Observational variables include plant height, leaf count, stem diameter, flower count, fruit count, fruit diameter, fruit length, and fruit weight. The results of this research: application of nano-technology compound fertilizer at a concentration of 2 ml/L with a frequency of thrice a week significantly promotes the growth in plant height and stem diameter of okra. Furthermore, the application of nano-technology compound fertilizer at a concentration of 6 ml/L with a frequency of thrice a week significantly influences fruit diameter, fruit length, and fruit weight in okra plants.

Effect of Organic and Inorganic Manures on Growth and Yield of Okra (Abelmoschus esculentus L. Moench) cv. Arka Anamika

The field experiment was conducted at the Horticulture Research CRC Farm – 1 of the Department of Horticulture, School of Agriculture, ITM University Gwalior (M.P.) during the year 2022 to study the effect of organic and inorganic manure on growth, yield and quality of okra. The experiment was laid out in the randomized block design with three replications and twelve treatments viz. FYM, Vermicompost, FYM + Vermicompost, 50% RDF + FYM, 50 % RDF + Vermicompost, 50 % RDF +FYM + Vermicompost, 75% RDF +FYM), 75% RDF + Vermicompost, 75% RDF +FYM +Vermicompost, 100% RDF +FYM), 100% RDF + Vermicompost, 100 % RDF +FYM + Vermicompost. A single standard variety (Arka Anamika) is sown with the different treatment combination with the plant to plant and row to row spacing maintained at 45 cm x 60 cm respectively. On the basis of the study, the results indicated that the application of 100% RDF +FYM + Vermicompost in Arka Anamika recorded significantly higher plant height (80.20 cm), number of branches per plant (8.58), number of leaves per plant at 90 DAS (68.83). However, higher yield (5.89q /ha) was recorded with the application of the 100% RDF +FYM + Vermicompost. Thus, integrated application of organic and inorganic manures improves the growth and yield of okra crop.

Performance of Okra and Soil Using Indigenous Microorganisms Inoculants

Microbial inoculants are beneficial microorganisms applied to plants or the soil to promote plant growth and control pest disease and weeds. Microbial inoculants isolated from local surroundings are indigenous microorganisms (IMO) inoculants. The performance of the IMO inoculants is varied depending on the sources and the local environment. Therefore, it is important to identify the right sources to enhance the efficiency of the IMO inoculants. This research aims to study the performance of okra and soil by mixing potential yeast sources for indigenous microorganisms (IMO) inoculants. Longan and mango were chosen as the sources of yeasts. The IMO inoculants were fermented for a week, and the microorganisms group was identified. Then, the IMO inoculants were applied to the okra and tested for physical and mineral content analysis. IMO inoculants with mango and longan showed a higher yeast population than the control. However, IMO inoculants with mango showed the best plant growth and harvesting time performance. The soil treated with both IMO inoculants also showed higher potassium and calcium. To conclude, plants treated with both IMO inoculants performed better than the control. Thus, IMO inoculants with longan and mango may potentially enhance the yeast community in IMO inoculants, indirectly improving okra growth and benefiting the agriculture field in the future.

The effect of organic manure on growth and yield of okra (Abelmoschus esculentus L.)

Field experiments to investigate the effect of different sources of organic manure (poultry manure (3 kg), Cattle manure (3 kg), Swine manure (3 kg), Rabbit urine (1lit)) on growth and yield of okra were carried out. The soil pH was checked and analyzed for pH 6.8 and the soil fertility is 6. The experimental site was cleared and cultivated (tilled and fertilized). Treatments were laid out before planting at once, there was no re-application of treatment. Data were collected on growth and yield parameters (plant height, foliage and fruit weight). There was a significant difference in the height of okra plant treated with poultry manure, cattle manure, swine manure, rabbit urine when compared with the control group. Poultry manure and Cattle manure significantly increase the foliage of okra plant when compared with Swine manure, Rabbit urine and the control. There was significant difference in the fruit weight of okra fertilized with Poultry manure and Rabbit urine when compared with the control but there was no significant difference in swine and cattle manure when compared with the control. From this experimental study, poultry manure and rabbit urine increased the growth and yield of okra and it is recommended for both subsistence farming and commercial production of okra.

Evaluation of the hydrogel effect on the growth and yield of okra (<i>Abelmoschus esculentus</i>) in an anthropized environment soil in Korhogo the northern part of Côte d'Ivoire

Rational use of fertilizers and irrigation water are concerns to modern agronomy considering an efficient and promising perspective to obtain better yields. This study aimed to evaluate the effects of potassium-based hydrogel on the growth and yield of okra on anthropized soils of Korhogo in Northern Côte d'Ivoire. The experimental design used consisted of three repetitions with the 8-modality hydrogel as the first factor (0 g, 0.1 g, 0.3 g, 0.5 g, 1 g, 2 g, 3 g and 4 g). The second factor was the type of application with 2 modalities: (0 cm and in depth of 6 cm). Control seedlings were established in soils without hydrogel. The results showed that the germination rate, growth and fruit yield of okra were significantly different for the different amounts of hydrogels used. The best results were obtained on plots that received 0.3 g of hydrogel applied at a depth of 6 cm. It was concluded that the rational use of 0.3 g hydrogels not only contributes to germination but also stimulates growth and improves the yield of okra grown on anthropized soils in the town of Korhogo. This quantity of hydrogel is therefore recommended for agricultural use to deal with the constraints linked to water scarcity and soil depletion.

Twice Applications of Laying Hens Manure Produced the Highest Yield of Organic Okra Pods (Abelmoschus esculentus L. Moench.)

The optimal okra cultivation using organic fertilizers remains a subject of limited information. This study aimed to assess the impact of applying 18 t.ha-1 of laying hens' organic fertilizer on the morphological and physiological traits of the "Naila IPB" green okra variety. The study was conducted between September and December 2022 at the IPB organic experimental field at Cikarawang, Bogor, West Java, Indonesia. A randomized complete block design with a single factor namely frequency of organic fertilizer application, was employed. The factor consisted of four levels: no organic fertilization, 1-, 2-, and 3-times applications. The results demonstrated that a single application of organic fertilizer led to an increase in plant height at 5, 7, and 9 weeks after planting (WAP), leaf number at 5 WAP, root dry weight at 4 WAP, stem dry weight at 10 WAP, and an acceleration in the onset of flowering. This resulted in a flowering period lasting 29.6 days, with a total flowering duration of 69.33 days. In contrast, a two-times application of organic fertilizer resulted in elevated plant height at 11 WAP, an increased leaf number at 11 WAP, heightened leaf potassium content, a greater number of pods per plant, and a higher yield of young pod okra. These findings contribute to our understanding of the effects of organic fertilizer application frequency on the growth and yield of young pod okra, aiding in the formulation of improved cultivation strategies.

Effect of varying sand percentage in sheath of nature-based capillary barriers composite on water storage capacity and okra growth in arid climate

Agricultural development in many arid countries including Oman is limited due to water scarcity which is currently exacerbated with increasing demand due to rapid population growth, economic development, and mismanagement of water resources. Impact of climate change is expected to adversely impact the water resources. Therefore, finding new efficient, environmentally friendly, and affordable water-saving techniques in agronomy is a necessity for achieving agricultural sustainability. Irrigation water can be saved by creating capillary barriers (CB) to unsaturated moisture flow. In this study, a “nature-inspired capillary barrier design” called hereafter as Smart Capillary Barrier (SCB) (mosaic of fine textured blocks, made of silt loam, and sandy sheath surrounding the blocks) was tested in series of field experiments with soil columns and pots. We investigated the effect of the percentage of sand of the sheath on water storage capacity of the SCB blocks and growth of okra (Abelmoschus esculentus L.) under deficit irrigation. Three proportions of sand to silt loam (sand%:silt loam%) in the sheaths were used in this study, SCB-25 (25:75%), SCB-50 (50:50%) and SCB-75 (75:25%). Our results show that increasing the percentage of sand in the designed and constructed SCB composite reduces evaporative and drainage water losses and therefore increases the water storage capacity of the blocks. Our SCB-75 attains 1.7–1.3 smaller drying rate than that for SCB-25 and SCB-50, respectively. Therefore, this composite had higher water saving capacity than a homogeneous soil (no capillary barrier) and a soil with a standard sand mulch (coarse soil overlies fine soil). The study found that using SCB composite did not consistently have a clear effect on the growth of okra plants at all stages of their development. However, during the development stage, using SCB-75 resulted in significantly higher dry biomass of the plants compared to using a homogeneous soil (the control). Additionally, during the initial stage of fruit yield, using SCB-75 also resulted in significantly higher fruit yield compared to using a homogeneous soil. Application of our SCB composite is a promising approach for saving water in desertic farming.

Allelopathic Effect of Sesame Varieties on Germination and Seedling Growth of Cowpea and Okra

Allelopathic Effect of Sesame Varieties on Germination and Seedling Growth of Cowpea and Okra

Influence of Organic Manures and Inorganic Fertilizers on Growth, Yield and Quality of Okra (Abelmoschus esculentus L. Moench)

A study was conducted at the Vegetable Research Farm, Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology & Sciences, Prayagraj (UP) during 2022. The purpose of the study is to evaluate the plants in terms of various parameters such as plant height, Leaf Area Index, days to 50% flowering, days to first harvesting, number of pods per plant, pod length, pod girth, pod weight, pod yield per plant, pod yield per plot, pod yield per hectare, total soluble solids (TSS), Vitamin C and benefit-cost ratio. The results of the study indicated that the application of mixture of 50% inorganic fertilizers and 50% FYM improved the growth and yield of Okra. The highest pod yield (12.06 t/ha), pod weigh (25.42 g), TSS (9.47 Brix) and Vitamin C content (24.26) were observed in the plants treated with 50 % through Chemical fertilizer + 50 % through FYM. The benefit-cost ratio was also found to be higher in the treated plants compared to the control. Overall, the study suggests that the application of 50 % through Chemical fertilizer + 50 % through FYM can be an effective and sustainable method for enhancing the growth, yield, and quality of Okra.

Influence of vermicompost on growth and yield of okra (Abelmoschus esculentus) in coastal area of Bangladesh

An experiment was conducted at the research field in the Department of Agriculture, Noakhali Science and Technology University, Noakhali, Bangladesh during the period from March to July 2022 to study the effect of vermicompost on growth and yield of okra. The experiment was laid out in a Randomized Complete Block Design (RCBD) comprising four treatments with three replications. The four treatments were T0 (Control), T1 (Vermicompost 10 t ha-1), T2 (Vermicompost 15 t ha-1) and T3 (Vermicompost 20 t ha-1). Green finger F1 okra used as planting material. Data were recorded from different stages of plant growth viz, plant height, days of flowering, fruit per plant, fruit length, fruit diameter, fruit weight, fruit weight per plant, yield per plot and yield per hectare. All the recorded parameters were statistically significant (P<0.01). The maximum days to first flowering (47.31 days) was recorded from T0 (Control), while the minimum days for first flowering (40.67 days) was found from treatment T3 (Vermicompost 20 t ha-1). The maximum height of okra plant (100.43 cm), number of fruits per plant (22.13), fruit length (13.60 cm), fruit diameter (2.01 cm), fruit weight (13.47 g), fruit weight per plant (198.02 g), yield per plot (1.78 kg), yield per hectare (17.8 t ha-1) were found in treatment T3 (Vermicompost 20 t ha-1) whereas lowest data recorded in treatment T0 (Control). Observing the results, it can be stated that application of vermicompost @ 20 t ha-1 for okra cultivation gave better growth and yield in the coastal area of Bangladesh. Res. Agric. Livest. Fish. Vol. 10, No. 2, August 2023: 165-173

PINCHING EFFECT ON PLANT GROWTH, YIELD, AND QUALITY OF DIFFERENT VARIETIES OF OKRA

Abelmoschus esculentus L. (Moench), sometimes known as okra, is a very significant crop that is grown all over the world in tropical, subtropical, and warm temperate climates. (2022; Chauhan et al. Their leaves are long-petiolated, 10–20 cm long, and have five to seven lobes. Flowers are axillary and range in size from 4 to 8 cm in diameter. They produce elongated fruits with a diameter of 1.5 to 3 cm and a length of 10 to 25 cm. (Ali 2022). Okra growth and yield are significantly influenced by pinching technique. (Sahu and Biswal 2020). Early herbage cutting encourages uniform growth, flowering, and seed germination. The "Effect of pinching on plant growth, yield, and quality of different varieties of okra" is the topic of this study. The practice of pinching, which involves the removal of terminal shoot tips, has been explored as a cultural technique to enhance plant growth, yield, and produce quality in different varieties of okra. This review article aims to provide a comprehensive overview of the effects of pinching on plant growth parameters, yield components, and the nutritional and sensory quality of various okra varieties. The review encompasses an in-depth analysis of the underlying physiological and morphological changes induced by pinching across different okra varieties. A synthesis of recent studies highlights the potential benefits and limitations of pinching in okra cultivation, considering the variability in results across different varieties and growing conditions. This review article systematically examines the effects of pinching on diverse varieties of okra with a focus on their growth patterns, yield attributes, and final harvest quality.

Trocas gasosas, pigmentos fotossintéticos e crescimento de quiabeiro hidropônico sob estresse salino e ácido salicílico

ABSTRACT The high concentrations of salts present in the water sources of the Brazilian Northeastern semi-arid region stand out as one of the limiting factors for agricultural production, contributing to soil salinization and/or sodification. Thus, it is extremely important to identify strategies to mitigate the effects of salt stress on plants, such as the foliar application of salicylic acid. In this context, the objective of the present study was to evaluate the effect of foliar application of salicylic acid as an attenuator of salt stress on leaf gas exchange, water relations, photosynthetic pigments, and growth of okra cv. Canindé grown in a hydroponic system. The experiment was conducted in a greenhouse, in Pombal, PB, Brazil. The treatments consisted of four levels of electrical conductivity of the nutrient solution - ECns (3.0, 5.0, 7.0, and 9.0 dS m-1) and four concentrations of salicylic acid - SA (0, 1.2, 2.4, and 3.6 mM) distributed in a completely randomized design in a split-plot scheme, considering the ECns levels as the plots and SA concentrations as the subplots, with four replicates and two plants per plot. ECns from 3.0 dS m-1 inhibited the synthesis of photosynthetic pigments, leaf gas exchange, and growth of okra cv. Canindé. Foliar application of salicylic acid at concentrations of up to 3.6 mM does not alleviate the effects of salt stress on water relations, gas exchange and growth of okra. Salicylic acid at a concentration of 1.8 mM stimulates chlorophyll a and b biosynthesis in okra under ECns of 3.0 and 4.0 dS m-1, respectively.

Impact of Biofertilizers & Different doses of NPK on Growth and Photosynthetic Pigments of Okra Plant (Abelmoschus Esculentus L. Moench)

Okra is an herbaceous hairy annual plant that belongs to the family Malvaceae. It is cultivated in tropical, subtropical, and warm temperate regions around the world. The present work was carried out to study the effect of biofertilizers (Azotobacter + Bacillus) and different concentrations of Nitrogen, Phosphorus, and Potassium i.e.NPK on growth and photosynthetic pigments of okra (Abelmoschus esculentus L. Moench). Okra can be named a multipurpose crop as its various parts such as leaves, buds, flowers, pods, stems and seeds can be used for different purposes [1]. Okra is rich in dietary fiber, vitamins, oils, etc. Application of hazardous fertilizers causes a nutrient imbalance in soil, With respect to reducing the causes due to chemical fertilizers, biofertilizers are suited best to maintain higher productivity and yield of crops. Random block design (RBD) was selected as an experimental design. The treatments combination taken are T0- Control, T1- Azotobacter + 50% NPK, T2- Azotobacter (2.5 kg/ha) + 100% NPK, T3- Bacillus (2.5 kg/ha) + 50% NPK, T4- Bacillus (2.5 kg/ha) + 100% NPK, and T5 with NPK 100%. The final result revealed, that the treatment combination with Azotobacter + 100% NPK (T2) showed the highest value of plant height (65.60 cm), number of leaves per plant(62.36), number of flowers per plant (27.40), and also carotenoid content (2.82 mg/g), chlorophyll a(2.47 mg/g) and chlorophyll b(3.25 mg/g) were observed maximum. So, it can be concluded through this paper that the combination of Azotobacter 2.5 kg/ha + 100% NPK (T2) is suitable for the okra plant for better growth and enhancement of photosynthetic potential in-field practices.

Effect of Co-application of Different Biochars and Inorganic Fertilizers on the Growth and Yield of Okra (Abelmoschus esculentus L.)

To manage necessary amount of food for the growing world population, it is very important to maintain fertility of usual arable land as well as to bring problem soils including sandy soil under coverage of regular crop cultivation. In this context, biochar is a very promising option as soil conditioner and therefore, a plant growth trial in pot was operated at the net house of the Department of Agroforestry and Environmental Science, Sylhet Agricultural University, Sylhet to evaluate the influence of tea waste and sugarcane bagasse biochar on the morphology, yield and yield contributing traits of okra (Abelmoschus esculentus) in sandy soil. The experimental set-up was arranged following randomized complete block design with three replications under eight treatments. The treatments were: T0 (CK, Control, no amendment), T1 (CF, Chemical fertilizers), T2 (2.5 % TWB (tea waste biochar) + CF), T3 (5% TWB + CF), T4 (10% TWB + CF), T5 (2.5% SBB (sugarcane Bagasse biochar) + CF), T6 (5% SBB + CF); and T7 (10% SBB + CF). The results revealed that the different morphological characteristics like plant height (PH), number of leaf plant-1 (NLP), leaf length (LL), plant fresh weight (PFW), and stem diameter (SD) showed no significant difference among the treatments. The highest PH (107.33 cm) and RL (70.67 cm) were found in T0 (CK) whereas the maximum LL (27.33 cm), SD (10.38 mm), and fresh root weight (FRW) (19.67g) were noted in T3. The maximum number of leaves plant-1 (NLP) (20) and PFW (110.67 gm) of okra were observed in T2 and T6, respectively. In case of total leaf chlorophyll content (TLCC), the maximum value was determined in T4 (47 µmol m-2), but the treatments were not significantly different from each other. The number of pod plant-1 (NPP) (23.7), pod length (PL) (18 cm), individual pod weight (IPW) (18 g), number of seed pod-1 (NSP) (45) and pod weight per plant-1 (PWP)(425 g) of okra were found to be highest in T7, followed by T4 and T6. The yield and yield contributing characters of okra showed significantly higher value for biochar treatments (T2 - T7) over to the control (T0) and sole chemical fertilizer treatment (T1). After the cultivation of okra, the highest pH value (7.2) was found in T7, followed by T6. The results of this study might contribute to enlarge the prospects of biochar application in the production of okra and other crops in both normal and less fertile soils.

Role of Organic and Inorganic Bio-fertilizers in the Growth and Yield of Okra (Abelmoschus esculentus (L) Moench)

The present investigation “was carried out at the Department of Horticulture, Gochar Mahavidhyalaya, Rampur Maniharan, Saharanpur affiliated by CCSU, Meerut, Uttar Pradesh in 2019-20. During the study period various treatments were given to accelerate the flowering growth and vegetative parameters of the selected species i.e. Okra (Abelmoschus esculentus (L) Moench). All the vegetative and fruit yielding and economic parameters shown the positive correlation with the given treatment and it was observed that the T12 (NPK (60:40:40) + Azotobacter + PSB) treatment was the best treatment to gain more output of the selected crop.