寒地水稻磷素施用量的研究

利用小区对比的方法，研究水稻空育131对磷素的需求和施磷量的确定。结果表明，随着施磷量的增加，磷肥产量贡献率和磷肥的偏生产力降低；生产100kg稻谷吸磷量变化数值为0.52～0.68kg，平均为0.62kg；土壤基础供磷量为4.09kg/667㎡。在试验土壤条件下，土壤速效磷含量为25.8mg/kg时，施入磷肥表现为增产效果较低。空育131最高产量施磷量为2.27kg/667㎡，最高产量620.38kg；最佳产量施磷量为1.63kg/667㎡，最佳产量618.62kg/667㎡。

Rice Phosphorus Fertilizer Research

In contrast to community studied 131 pairs of sterile rice empty Phosphorus needs and determine the amount of phos- phorus. The results showed that with the increase in phosphorus, phosphate fertilizer and phosphate ,fertilizer production in the contribution rate of the partial productivity; production of 100 kilograms of rice P uptake changes in value of 0.52 - 0.68 kg, with an average 0.62 kg; foundation soil for phosphorus of 4.09 kg/667 m^2. During the trial the soil conditions, soil available phosphorus content of 25.8 mg / kg, the applied phosphate to yield a lower performance. 131 P maximum production capacity of 2.27 kg/667 m2, the maximum output of 620.38 kg; best production capacity of phosphorus 1.63 kg/667 m^2, the best output of 618.62 kg/667 m^2.