CAJ | 학술논문

以通州区石灰性灰潮土为供试土壤，研究了不同施磷水平对土壤速效磷含量及水稻产量的影响，测定了水稻不同施磷水平下磷肥的利用率。结果表明，在中等含磷的土壤上，石灰性灰潮土的磷肥系数为1．72，磷肥临界值为6．0mg／kg；水稻合理施用磷肥能显著增产，但产量只在一定的施磷水平下随着施磷量的增加而增加，其667m。最经济施磷量为3．8kg，最高产量施磷量为9．4kg。磷肥利用率则随施磷量的增加而逐渐下降，平均利用率为8．5％。
이통주구석회성회조토위공시토양，연구료불동시린수평대토양속효린함량급수도산량적영향，측정료수도불동시린수평하린비적이용솔。결과표명，재중등함린적토양상，석회성회조토적린비계수위1．72，린비림계치위6．0mg／kg；수도합리시용린비능현저증산，단산량지재일정적시린수평하수착시린량적증가이증가，기667m。최경제시린량위3．8kg，최고산량시린량위9．4kg。린비이용솔칙수시린량적증가이축점하강，평균이용솔위8．5％。
The effects of different phosphorus fertilization level on soil rapid available phosphorus and rice yield are studied in calcareous fluvo-aquic soil of Tongzhou area, the utilization rate of phosphate fertilizer is determined in different phosphorus fertilization level. The results show： the phosphate fertilizer coefficient of calcareous fluvo-aquic soil is 1.72 in middle containing phosphorus soil, the critical value is 6.0 mg/kg; the reasonable applying phosphate fertilizer can significantly increase the yield of rice, and the yield is increased with the increasing of applying phosphate amount below a certain phosphorus fertilization level, the best phosphorus fertilization amount is 3.8 kg, and the phosphorus fertilization amount of the highest yield is 9.4 kg. The phosphate utilization rate is decreased with the increasing of applying phosphate amount, the averaKe utilization rate is 8.5%.