STUDIES ON THE RELATIONSHIP BETWEEN DENSITY, NITROGEN, PHOSPHOROUS AND YIELD IN FUJIAN SPRING SOYBEAN

The design method of quadratic rotation regression has been applied in the present experiment to study the relationship between soybean yield and the primary factors of soybean cultivation: density, nitrogen (carbamide), phosphorus (calcium superphosphate).Analyzing the primary composition, the effect rank of these cultivation factors on yield has been determind as follow: density carbamide calcium superphosphate.The integrated agricultural measures for obtaining the yield of 150 kg/mu in PUDOU-8008 are: 3.7-3.8 the thousand plant/mu; the dosage of carbamide 2.5-6.5 kg/mu and calcium superphosphate 9-21 kg/mu. For obtaining the yield of I00kg/mu in NlNGZHEN NO1 are,2.8-3.3 ten thousand plant in per mu and the dosage of carbamide 6-14 kg, calcium superphosphate 12-23 kg.