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控释肥料提高氮素利用率的作用及对水稻效应的研究
引用本文:郑圣先,聂军,熊金英,肖剑,罗尊长,易国英.控释肥料提高氮素利用率的作用及对水稻效应的研究[J].植物营养与肥料学报,2001,7(1):11-16.
作者姓名:郑圣先  聂军  熊金英  肖剑  罗尊长  易国英
作者单位:1.湖南省土壤肥料研究所 湖南长沙410125
基金项目:湖南省“九五”重大科技项目(9501047);农业部“948”项目(991076)资助。
摘    要:研究了田间条件下控释肥料氮的释放速率与水稻吸收氮量之间的关系。结果表明 ,控释肥料氮的释放速率在水稻生育前期高 ,但随着时间的进程而逐渐降低。水稻从 70日型控释肥料中吸收的氮遵循三次曲线 ,因此 70日型控释肥料能够满足水稻本田生长期对氮的需要。施用控释肥料的水层含氮量极低 ,且无可见的水藻生长 ;而施尿素的水层则尿素N和NH4+-N含量高 ,水藻活动繁茂 ,滞留于水层的肥料氮 5~ 6d内迅速地降至无氮对照水平 ,氨的挥发损失和氮的反硝化损失大。控释肥料氮的利用率高达 72.3% ,比尿素高出 36.5个百分点。

关 键 词:控释肥料    稻田水层含氮量    氮肥利用率    增产效率
文章编号:1008-505X(2001)01-0011-06
修稿时间:2000年3月8日

Study on role of controlled release fertilizer in increasing the efficiency of nitrogen utilization and rice yield
ZHENG Sheng xian,NIE Jun,XIONG Jing ying,XIAO Jian,LOU Zun chang,YI Guo ying.Study on role of controlled release fertilizer in increasing the efficiency of nitrogen utilization and rice yield[J].Plant Nutrition and Fertilizer Science,2001,7(1):11-16.
Authors:ZHENG Sheng xian  NIE Jun  XIONG Jing ying  XIAO Jian  LOU Zun chang  YI Guo ying
Affiliation:1.Soil and Fertilizer Institute;Hunan Province;Changsha 410125;China
Abstract:Field experiment was conducted in paddy soil to determine therelationship between N release from controlled release fertilizer and N uptake by rice plants . N release rate of controlled release fertilizer was higher during the early growing period of rice, but gradually decreased with time. The cumulative N release reached about 80% of the total N content of fertilizer at around 70 day after application or when cumulative air temperature had reached about 2000℃. Nitrogen uptake from the fertilizer followed a cubic curve. Therefore, the fertilizer can meet the N requirements of two-line system late hybrid rice throughout the whole growing period. There were lower N concentrations of the water and hardly any algae observed in the plots where controlled release fertilizer applied. Higher urea N and ammonium N concentration of the water in the paddy field after urea applied indicates the greater N losses from NH3 volatilization and denitrification. As high as 72.3% in late rice of fertilize r N were recovered by the rice plant at harvest (grain+straw) with the 70 day type controlled release fertilizer. Controlled release fertilizer increased efficiency of nitrogen use and minimized environmental pollution.
Keywords:controlled release fertilizer  nitrogen content in water of paddyfield  nitrogen recovery  increase yield efficiency
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