施肥进步在红壤稻作区水稻增产中的贡献及其对土壤肥力的影响

Contribution of Fertilization Development in Rice-yield Increase and Effects on Soil Fertility in Red Paddy Area

在中国科学院桃源农业试验站模拟我国 8种施肥制度的 10年田间定位试验结果表明 :施肥实现的水稻产量中由于化肥应用所占的贡献份额为 3 8.5 % ,有机无机结合施用所占的贡献份额为 44 .7% ;N和NP施肥制度导致土壤肥力因素的发展不平衡 ,NPK配合的石油农业施肥制度可维持土壤地力 。

Aong-term field trial on eight simulated models representing the fundamental types of fertilization system in China had been carried out in Taoyuan Agro-ecosystem experimental Station of the Chinese Academy of Sciences from 1990 to 1999. The results indicated that the contribution of fertilization to crop yield was significantly influenced by the fertilization system adopted in rice cropping systems of red soil area of China. In the case of optimum fertilization system, the largest contribution of fertilizer applied was 38.5% while that of incorporation organic and inorganic fertilizer was 44.7%. The fertilization systems of N and NP could conduce to the imbalance of the soil fertility development while the fertilization system of NPK could maintain the soil fertility. But it could promote effectively that soil organic matter cumulated and soil fertility increased incorporation the organic manure and fertilizer.