水氮耦合对红枣植株养分含量的影响

Effects of Coupling of Water and N on Plant Nutrient Content of Zizyphus Jujube

在不同水氮处理条件下分析红枣植株地上部分各器官N、P、K的含量,结果表明:水氮耦合对植株养分含量产生了一定的影响。灌水量适度的条件下,随氮素施入量的增加,枣叶中氮、磷、钾浓度均先增后减;枣头和枣吊中氮、钾浓度逐渐增大,磷浓度则先增后减;二次枝中氮浓度逐渐增大,磷、钾浓度则逐渐减小。氮素施入量适度的条件下,随灌水量的增加枣叶中氮、磷浓度先增后减,钾浓度则呈逐渐减小趋势;枣头中氮、磷、钾浓度均先增后减;枣吊和二次枝中氮浓先增后减,磷浓度逐渐增大,而钾浓度则逐渐减小。

The content of N,P,K in plant of Zizyphus Jujube under different treatments of water and N was analyzed.The results showed that the different treatments of water and N had impacts on nutrient content of plant.Under the right amount of water,with the quantity of N adding,the content of N,P,K in leaves all increased,and then decreased.The content of N,K in top of branch and thin branch of hanging fruit increased,but the content of P increased,and then decreased.The content of N in branch from tree second branched increased,but the content of P,K decreased.Under the right amount of N,with the quantity of water added,the content of N,P in leaves all increased,and then decreased,but the content of K decreased.The content of N,P,K in top of branch all increased,and then decreased.The content of N in thin branch of hanged fruit and branch from the second branch all increased,and then decreased,the content of P increased,but the content of K decreased.