期刊论文

Effects of phosphorus fertilizer reduction on the growth, yield and its utilization efficiency of double cropping rice

中文

湖南农业大学学报(自然科学版)

1007-1032

2016

42

2

197-201

10.13331/j.cnki.jhau.2016.02.017

:国家十二 2012BAD15B04:国家科技支撑计划 2014BAC09B01:国家科技支撑计划 14K047:湖南省高等学校创新平台开放基金 14K048:湖南省高等学校创新平台开放基金

本校为第一机构

采用田间小区试验,研究磷肥减量施用对双季稻生长发育、光合特性、产量及磷肥利用率的影响。结果表明,早稻P_2O_5施用72 ~90 kg/hm~2、晚稻P_2O_5施用48 ~60 kg/hm~2能促进水稻生长和分蘖,改善水稻的光合特性,提高水稻的产量和磷肥利用率;与常量磷肥处理(早、晚稻P_2O_5施用量分别为90、60 kg/hm~2)相比,磷肥减量10%(早、晚稻P_2O_5施用量分别为81、54 kg/hm~2)和磷肥减量20%处理(早、晚稻P_2O_5施用量分别为72、48 kg/hm~2)的早、晚稻不减产,磷肥利用率提高4.37%~24.29%,磷肥农学利用率提高1.39~4.27 kg/kg;磷肥减量30%(早、晚稻P_2O_5施用量分别为63、42 kg/hm~2)处理的早、晚稻减产显著,减产...

The effects of phosphorus fertilizer reduction on the growth, photosynthetic characteristics, yield and its utilization efficiency on double cropping rice were studied through field plot experiments. The results showed that the photosynthetic characteristics, yield and phosphorus utilization efficiency were improved with the application of phosphorus fertilizer at 72-90 kg/hm~2 P_2O_5 for early rice and at 48-60 kg/hm~2 P_2O_5 for late rice, the growth and tillers of double cropping rice were also promoted. The phosphorus utilization efficiency and agronomic phosphorus efficiency were both imp...