氮肥用量和水分淋溶对土壤和小麦氮素平衡的影响  

Nitrogen balance in soil and wheat as affected by N fertilization and water leaching

作　　者：郭建华 Henry Janzen 

机构地区：[1]河北省农业科学院土壤肥料研究所，河北 石家庄 050051 [2]Lethbridge Research Center,AgricultureandAgri-Food，Canada.

出　　处：《土壤通报》2000年第6期259-261,共3页Chinese Journal of Soil Science

基　　金：中加合作项目资助(282/15883)

摘　　要：:利用标记15N尿素研究不同施肥量和淋溶对小麦生长的影响 ,结果表明水分淋溶对小麦生长的影响不明显 ;地上部生物产量与肥料利用率成正相关 .小麦根系越发达 ,收集到的淋溶液越少 ,损失的肥料N越少 .施用相同量的氮肥 。The effect of urea dose and water leaching on the growth of wheat by using 15 N tracing method was investigated. We found that water had no significant effect on the growth of wheat, while the biomass of above ground was related positively to the amount of N fertilizer. The more developed the wheat roots were, the less leachate could be collected, thus, less loss of N fertilizer was observed. The efficiency of N fertilizer was higher in the treatment of traditionally irrigated soil than the leaching treatment, when the same amount of fertilizer was applied.

关 键 词：氮肥平衡 水分淋溶 养分循环 土壤 小麦 

分 类 号：S143.1[农业科学—肥料学] S153[农业科学—农业基础科学]