Breeding and mathematical model of agronomic measures for high yield and protein content soybean variety Fudou 234

Fudou 234 is a new spring soybean variety bred from the crossing between Pudou 8008 and Huang-shadou.The variety possessed the characters of high protein content, high and stable yield, extensive adaptability.The relation of seed yield with different agrenomic practices (density, N, K) for Fudou 234 were studied by using the quadratic universal rotation combination design.The results showed that the optimal measures to get the yield more than 2250 kg·hm-2 were as follow: the amount of urea applied was 77.25-93.30 kg·hm-2, potassium chloride was 108.15-129.45 kg·hm-2, the plant density was 283500-325500 plants·hm-2 in red-yellow upland soil.