EFFECT OF ORGANIC MANURES AND THEIR COMBINATIONS ON SOIL PROPERTIES AND YIELD OF OKRA (Abelmoschus esculentus L.)
A field experiment was conducted at Biratnagar-4, Morang of Nepal during April – July, 2019 to evaluate the effects of organic manures and their combinations on soil properties and yield of okra var parvati. The experiment was conducted in randomized complete block design with seven treatments and three replications. The treatments consisted of human urine, poultry manure, FYM, goat manure, FYM + human urine, goat manure + human urine and recommended fertilizer. All the treatments were based on fulfillment of required nitrogen by the crop. The result showed that the highest pod yield (24.303 Mg ha-1) was obtained from the application of poultry manure. After okra harvest, the highest soil organic matter (0.4760 %), total soil nitrogen (0.243%), and available phosphorus (26.17 kg/ha) were determined from the soil of poultry manure treatments but the highest available potassium (109.2 kg/ha) was from FYM + human urine treatments. The highest N concentration in straw (5.280 %) and pod (2.253 %), P2O5 concentration in straw (0.2607 %) and pod (0.3447 %) was obtained from poultry manure treatment and the highest K2O concentration in straw (1.320 %) and pod (2.757 %) was determined from FYM + human urine application. Uptake of N (286.7 kg/ha) and P (25.60 kg/ha) was significantly higher in poultry manure application followed by the application of FYM + human urine. Higher uptake of K (163.1 kg/ha) was obtained under FYM + human urine application followed by goat manure + human urine (148.1 kg/ha). The highest benefit cost ratio (2.99) was obtained from the application of poultry manure application and the lowest benefit cost ratio (2.22) was found under human urine application. This result suggest that poultry manure was important for increasing soil properties and performance of okra and can be used as an alternative to the chemical fertilizer.
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