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Subject: Horticulture × Author: Baro, Ankita × Start date: 2017 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    ORGANIC NUTRIENT MANAGEMENT IN OKRA (Abelmoschus esculentus (L.) Moench.)
    (2023) Baro, Ankita; Gautam, B.P.
    An experiment entitled “Organic nutrient management in Okra (Abelmoschus esculentus (L.) Moench.) was carried out at the Instructional cum Research Farm, Department of Horticulture, Biswanath College of Agriculture, AAU, Biswanath Chariali during 2022-2023 with the following objectives (i) To study the effect of various organic nutrients on growth, yield and quality of Okra, (ii) To sort out the suitable organic nutrient combination for Okra. The experiment was laid out in Randomized block design with 3 replications incorporating 16 treatments viz., T1: FYM @20 t/ha, T2: Vermicompost @5 t/ha, T3: Neem cake @2 t/ha, T4: Poultry Manure @5 t/ha, T5: FYM @10 t/ha + Vermicompost @2.5 t/ha, T6: FYM @10 t/ha + Neem cake @ 1 t/ha, T7: FYM @10 t/ha + Poultry manure @2.5 t/ha, T8: Vermicompost @2.5 t/ha + Neem cake @ 1 t/ha, T9: Vermicompost @2.5 t/ha + Poultry manure @2.5 t/ha, T10: Neem cake @1 t/ha + Poultry manure @2.5 t/ha, T11: FYM @10 t/ha + Biofertilizer Consortia, T12: Vermicompost @2.5 t/ha + Biofertilizer Consortia, T13: Neem cake @1 t/ha + Biofertilizer Consortia, T14: Poultry manure @2.5 t/ha + Biofertilizer Consortia, T15: FYM + Recommended NPK, T16: Untreated Control. In the present study, the inorganic treatment T15 was found to perform best in terms of growth and yield. Significantly the highest plant height (66.02 cm and 94.00 cm at 45 DAS and at 60 DAS, respectively), internodal length (8.73 cm at 60 DAS), length of leaf (17.98 and 20.25 at 45 DAS and 60 DAS respectively), breadth of leaf (20.23 and 22.74 at 45 DAS and 60 DAS respectively) and number of functional leaves per plant (12.71 and 16.52 at 45 DAS and 60 DAS respectively) were recorded in T15. Among organic treatments, the highest plant height (65.70 cm and 90.70 cm at 45 and 60 DAS respectively), internodal length (7.86 cm at 60 DAS), length of leaf (17.84 and 19.54 at 45 DAS and 60 DAS respectively), breadth of leaf (20.04 cm and 22.04 cm at 45 DAS and 60 DAS respectively) and number of functional leaves per plant (12.16 and 16.06 at 45 DAS and 60 DAS respectively) were recorded in treatment T1. All the physiological parameters viz. area of a leaf, leaf area per plant, leaf area index, total leaf chlorophyll content, chlorophyll stability index and relative leaf water content were recorded significantly highest in inorganic treatment (T15). Among the organic treatments these parameters were found best in T1 whereas the lowest was recorded in T16 (Control). The minimum days for appearance of the first flower (30.12 days) and days to first harvest (37.12 days) were recorded in treatment T11 and maximum harvest duration was recorded in T15 (41.43 days). Again, the maximum number of fruits per plant (18.99), fruit length (14.10 cm), fruit girth (6.55 cm), fruit volume (18.42 cc), the weight of individual fruit (15.71 g), fruit yield per plant (0.29 kg) and yield per hectare were recorded in treatment T1. However, the fruit yield per hectare was significantly highest in inorganic treatment T15 (14.12 t/ha). Among all the treatments the highest vitamin A (375.06 I.U) and vitamin C (29.00 mg/100g) were recorded in organic treatment T5 and minimum fiber content was recorded in T12 (9.76 %). Minor incidences of pests and diseases were observed and it was controlled effectively at the initial stage by applying proper organic fungicide and insecticide. Considering the highest B:C ratio (2.53:1) and with superior morphophysiological attributes among the organic treatments in T1, it could be advised to the grower of this region to apply FYM @20t/ha in Okra to get a good crop harvest with quality fruit.