Integrated Plant Nutrients Supply and Foliar Nutrition on Fruit Yield, Nutrient Uptake and Availability in Okra [Abelmoschus esculentus (L.) Moench] Hybrid COBhH- 4 in an Alfisol of Tamirabarani Command Area

The present investigation was undertaken with the main objective of evaluating the effect of IPNS and foliar nutrition on soil nutrient availability, uptake and fruit yield of okra COBhH-4. The thirteen treatments comprising of STCR-IPNS / 100 % N through FYM in alone / in combination with Micronutrients, Moringa leaf extract and Aloe vera leaf extract and Amino acids. The highest fruit yield of 24.24 t ha-1 was recorded by the application of STCR-IPNS + AA + MN + ALE+ MLE (FS) followed by 100 per cent N through organics + AA + MN + ALE+ MLE (FS).The per cent yield increase over control was 135.80 and 124.71 per cent respectively for STCR-IPNS followed by FYM both in combination with amino acids + Micro nuttrients + Aloevera + Moringa Leaf Extract as foliar spray. The effect of micronutrients as foliar along with STCR-IPNS was the next best treatment. The highest BCR of 5.27 was recorded by STCR-IPNS + MN + ALE + MLE (FS) followed by 4.92 by STCR IPNS + MLE (FS) (T 10). Among the different treatments, STCR-IPNS + Amino Acids + Micronutrients + Aloe vera + Moringa leaf extract (FS) recorded significantly the highest soil available N (282, 290 and 236 kg ha-1), soil available P (27.8, 21.9 and 19.8 kg ha-1) and plant N content (2.16 , 2.35 and 2.46 %), plant P (0.24, 0.38 and 0.62 %) , plant K (1.83, 2.38 and 2.92 %) and total plant N uptake (96.39 104.75 109.67 kg ha-1), total P uptake (10.47, 16.99 and 27.68 kg ha-1) and total K uptake (81.59, 106.11 and 130.15 kg ha-1) by okra at all the three critical growth stages. The highest content and uptake of N (2.91% and 71.23 kg ha-1), P (0.32% and 7.92 kg ha-1), K (2.81% and 68.80 kg ha-1), Zn (91.84 mg kg-1 and 0.225 kg ha-1), Fe (427.85 mg kg-1 and 1.047 kg ha-1) and B (29.22 mg kg-1 and 0.072 kg ha-1) by fruits was recorded by the treatment STCR-IPNS + Amino acids + Micronutrients + Aloevera + Moringa leaf extract (FS). At all the three stages, higher NPK availability was recorded by the same treatment (T 12) followed by T 13. The treatments which received STCR-IPNS in alone or in combination with AA/ MN/ ALE/ MLE recorded higher available K (365, 330 and 312 kg ha-1) content in soil compared to 100% N through organics in alone or with similar combinations.