Abstract:

The aim was to study the rational fertilization of autumn cabbage 87-114. Field experiments was carried out with "3414" design of the optimal regression test, the conventional fertilization of nitrogen, phosphorus and potassium were 360 kg/hm2, 180 kg/hm2 and 180 kg/hm2. The results showed that based fertility test area was 86.3%, three fertilizer contribution rate of K>N>P. Fertilizer recommended rates were stimulated by the models of one-factor. The results indicated that the optimum fertilizer rates of nitrogen (N), phosphorus (P2O5) and potassium (K2O) were 334 kg/hm2, 106 kg/hm2 and 140 kg/hm2 respectively. The ratio of nitrogen, phosphorus and potassium was 2.39:0.9:1. "3414" test could determine nitrogen, phosphorus and potassium application and reduce the three fertilizer application under the existing conditions of soil fertility.