中国蔬菜Issue(9)：48-52,5.
不同铵硝配比对叶用莴苣生长及氮磷钾养分积累的影响
Effects of Different Ammonium and Nitrate Ratios on Lettuce Growth and Accumulation of Plant Nitrogen,Phosphorus and Potassium
摘要
Abstract
Under hydroponic condition,this paper studies the effect of different ammonium and nitrate ratio(CK,0∶100;T1,10∶90;T2,25∶75;T3,50∶50)on lettuce(Lactuca sativa L.)growth and N,P,K accumulation.The results showed that compared with the CK,T1 significantly promoted the lettuce growth,and its fresh weight of aerial part and economic yield were increased by 15.77%and 15.21%,while the fresh weight of aerial part and economic yield in T2 and T3 treatments were significantly reduced.The N,P,K accumulation in lettuce plant were behaved as T1>CK>T2>T3 under different ammonium and nitrate ratio treatment.There were significant differences existing among treatments.The nitrogen loss ratios of each treatment under hydronic cultivation were between 20.17%-65.31%.Compared with the CK,the nitrogen loss amount and loss rate under T1 treatment were reduced by 14.79%and 4.24 percentage points,respectively,while the nitrogen loss amount and loss rate under T2 and T3 treatments were significantly increased.The plant growth and N, P,K accumulation were improved by 10%ammonium in nutrient solution,and yet its nitrogen loss was reduced significantly.关键词
铵硝配比/叶用莴苣/养分吸收/氮素损失Key words
Ammonium and nitrate ratio/Lettuce/Nutrient uptake/Nitrogen loss引用本文复制引用
雷玉玲,陈紫妍,宋世威,陈日远,刘厚诚,孙光闻..不同铵硝配比对叶用莴苣生长及氮磷钾养分积累的影响[J].中国蔬菜,2015,(9):48-52,5.基金项目
广州市科技计划项目（201300000203），大宗蔬菜产业技术体系专项 （）
