土壤基础肥力对水稻产量的影响及施肥指标体系确立

Effect of Soil Fertility on Yield of Rice and Establishment of Fertilization Index System

为了确立宁夏平罗县水稻施肥指标体系,以指导当地水稻优质高效生产。试验设置无肥区和常规施肥区2个处理,采用多点无重复设置,把土壤基础肥力对水稻产量的影响进行深化分析研究。结果表明:土壤基础肥力对水稻产量的贡献率与水稻土壤基础产量成正比,回归方程式y=13.66+0.007322x,R2=0.8509**。由此得出,水稻的目标产量可确立为11800 kg/hm2,此时,氮和磷的施肥指标值——纯N为371.2 kg/hm2,纯P2O5为154.0 kg/hm2。

In order to establish the index system for fertilization in Pingluo County of Ningxia, and to guide thehigh quality and high efficient rice production, two treatments： one in the area without fertilizer and the other inthe area of conventional fertilization, were designed with multi-point no repeat settings, and investigation of theinfluence of soil fertility on yield of rice was carried out. The results showed that the contribution of soil fertilityto rice yield was in direct proportion to the basic rice soil production, the regression equation was y=13.66＋0.007322 x, R2=0.8509＊＊. In conclusion, the goal of rice yield could be established as 11800 kg/hm2, at the sametime, nitrogen and phosphorus fertilizer index values were： pure N 371.2 kg/hm2, pure P2O5 for 154.0 kg/hm2.