华北农学报2017，Vol.32Issue(3)：207-213,7.DOI:10.7668/hbnxb.2017.03.032
滴灌水肥一体化下施氮量对小麦氮素吸收及土壤硝态氮含量的影响
Effects of Nitrogen Amount on Nitrogen Absorption of Wheat and Soil NO-3-N Content under Drip Fertigation
摘要
Abstract
The effects of nitrogen fertilizer application rate on the nitrogen utilization and soil NO-3-N content were studied to provide a scientific basis for reasonable nitrogen management under drip fertigation in Piedmont Plain of Hebei.The objective of this experiment was in this area.The experiment was conducted to determine the effects of nitrogen fertilizer application rate on nitrogen absorption and soil nitrogen content by using four nitrogen level of N0-No nitrogen, N1-120 kg/ha, N2-240 kg/ha and N3-360 kg/ha, under drip fertigation in field in 2013-2014 and 2014-2015 wheat seasons.The results showed that dry matter weight and yield of N1,N2 and N3 were significantly higher than N0,but no significant difference under N1,N2 and N3 treatments.The effect of nitrogen amount on N content of wheat stem was significantly and on N content of grain was no significantly.The total nitrogen uptake amount in wheat were significantly increased under the condition of N3 treatment compared with that of N0,N1 and N2,the total nitrogen uptake amount were no significantly difference between N1 and N2 treatments.The highest N harvest index appeared in N2 treatment.N recovery efficiency,N agronomy efficiency,N productive efficiency and N use efficiency were decreased with nitrogen amount increasing.Soil NO-3-N content were significantly increased as nitrogen fertilizer application rate was higher than 240 kg/ha,and that was more obvious with the increase of the planting time.The nitrogen application rate for highest yield was 238.46-250.78 kg/ha.The economic nitrogen application amount was 174.28-207.18 kg/ha,which was calculated according to the wheat yield and the nitrogen application amount by one variable quadratic equation.Considering the soil ecological environment and the economic efficiency,the optimal nitrogen application rate was at 174-207 kg/ha under the experiment condition.关键词
小麦/滴灌/水肥一体化/施氮量/氮素吸收/土壤硝态氮Key words
Wheat/Drip irrigation/Fertigation/Nitrogen application rate/Nitrogen uptake/Soil NO-3-N content分类
农业科技引用本文复制引用
郭丽,王丽英,张彦才,史建硕,李若楠,王艳霞,任燕利..滴灌水肥一体化下施氮量对小麦氮素吸收及土壤硝态氮含量的影响[J].华北农学报,2017,32(3):207-213,7.基金项目
农业部公益性农业(行业)科研专项(201303133-1-5) （行业）
