Abstract:

In order to promote the paddy rice highly effective production and to reduce the influence to environment brought by fertilizer investment, the paper studied on the effect of different soil fertility levels and different nutrient management patterns on rice high-yield and resource high-efficiency utilizing by field experiment. The results showed that: using N fertilizer could significantly improve the rice yield. Compared with black treatment, the early rice increased by 23.00%-26.10% and the late rice increased by 36.66%-71.43%. Furthermore, in the same nitrogen level, low fertilizer land with the average yield increasing efficiency was better than middle fertilizer land. The best nutrient management model could highly increase nitrogen use efficiency on the three nutrient management mode, it was improved 10.00% and 8.36% than the peasants fertilize habits on early rice and that of 19.60% and 16.89% on late rice in the same soil fertility level. In different soil fertility levels, sufficient nitrogen could increase the number of filled grains and effective panicle for rice, got more nitrogen translating to grain.