Effect of integrated plant nutrient supply (IPNS) on concentration of N, P, K and yield of okra.

摘要

A field experiment was conducted during summer 2002 to study the crop yield and concentrations of N, P and K in okra as influenced by integrated plant nutrient supply system. The treatments were T1: absolute control, T2: 100:50:50 kg NPK/ha (recommended dose), T3: T1+10 Mg farmyard manure (FYM)/ha, T4: T1+10 Mg spent wash-pressmud compost (SW-PMC)+Azospirillum (A), T5: T1+15 Mg SW-PMC+A, T6: T1+20 Mg SW-PMC+A/ha, T7: T1+10 Mg FYM+A/ha, T8: T1+A, T9: SW-PMC at 20 Mg+A, and T10: SW-PMC at 20 Mg/ha. T7 recorded the highest fruit (92.71 q/ha) and straw (133.33 q/ha) yields. It also recorded the highest concentrations of N (2.97%) and K (3.03%) in fruit, and the highest concentrations of N (1.71%), P (0.25%) and K (1.53%) in straw.