中国农业大学学报2017，Vol.22Issue(5)：144-152,9.DOI:10.11841/j.issn.1007-4333.2017.05.17
磷肥后移与减量对水稻磷素利用效率的影响
Effect of phosphorus fertilizer postpone and reduction on phosphorus utilization efficiency of rice
摘要
Abstract
To study the effect of phosphorus fertilizer postpone and reduction on phosphorus utilization efficiency of rice during the growth period,field experiments related to soil testing and phosphorus recommendation as well as phosphorus fertilizer postpone and reduction during rice growth period were carried out to analyze the rice yield,phosphorus accumulation and phosphorus use efficiency.Results showed that under the same phosphorus level,compared with the soil testing and P fertilizer recommendation treatments (P used as basal fertilizer),the P concentration as well as the amounts of total and net phosphorus accumulation in rice during the later growth period in T3 (basal P∶ top dressed P=7 ∶ 3) were4.3％ 、12％ and 25.6％ higher than those in T2(P used as basal fertilizer).Meanwhile,the contribution rate,agronomic use efficiency,partial fertilizer productivity and absorption efficiency of phosphorus in treatments of phosphorus fertilizer postpone 30％ were increased by 27.7％ 、33.6％ 、8.2％ and 27.3％,and the rice yield increased by 8.2％ than that in T2(P used as basal fertilizer),respectively.The rice yields in P fertilizer recommendation treatments (T2,P used as basal fertilizer),were 1.8％ and 6.5％ higher than that in reduction 30％ plus postpone 30％ of phosphorus fertilizer and the treatments of reduction 50％ plus postpone 30％ of phosphorus fertilizer,but the difference was not significant (P＞0.05).Results from this study indicated that reasonable amount of phosphorus fertilizer postpone increased phosphorus uptake and accumulation,P utilization efficiency and rice yield during the growth period;and reasonable amount of phosphorus fertilizer reduction maintained normal production of rice.关键词
水稻/磷肥/产量Key words
rice/phosphorus/grain yield分类
农业科技引用本文复制引用
龚海青,张敬智,陈晨,郜红建,常江,章力干,丁玉宇..磷肥后移与减量对水稻磷素利用效率的影响[J].中国农业大学学报,2017,22(5):144-152,9.基金项目
国家自然科学基金(31328020) （31328020）
国家科技支撑计划项目资助(2013BAD07B08,2012BAD04B09) （2013BAD07B08,2012BAD04B09）
