石灰性灰潮土水稻施磷效应及利用率  

The efficiency of applying phosphate on rice and utilization rate in calcareous fluvo-aquic soil

作　　者：姜剑平 刘伯芹 

机构地区：[1]江苏省南通市通州区土肥站,江苏南通226300 [2]南通市作物栽培技术指导站,江苏南通226000

出　　处：《磷肥与复肥》2012年第2期71-73,共3页Phosphate & Compound Fertilizer

摘　　要：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6.0 mg/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667 m2最经济施磷量为3.8 kg,最高产量施磷量为9.4 kg。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%。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%.

关 键 词：水稻 施磷肥效应 磷利用率 

分 类 号：S511[农业科学—作物学]