梨枣叶片内矿质元素年动态变化研究

Study on Annual Dynamic Change of Mineral Elements in Theleaf of Pear-jujube

为了改善梨枣营养环境,提高果品品质,增加产量,为营养诊断和科学合理的施肥提供一定的科学依据,以梨枣为试材,研究了叶片中5种矿质元素含量的年周期动态变化。结果表明,梨枣在不同的生长发育时期,其矿质元素表现出不同的变化规律:梨枣展叶开花期叶片氮、磷元素含量较高,自果实生长发育期开始呈下降趋势,到果实膨大期结束开始上升,采收后又下降;梨枣展叶开花期叶片钾、钙、镁元素含量较低,坐果期、果实膨大期含量增加,到果实成熟期出现不同程度的降低,果实采收后又迅速升高。

To improve the nutrition environment of pear-jujube and fruit quality of pear-jujube to increase the production,and provide a scientific basis for nutrition diagnosis and fertilization,annual dynamic change of five kinds of mineral elements in the leaf of pear-jujube was studied.The results showed that the change rule of mineral elements of pear-jujube was different in different growth period：the content of nitrogen and phosphorus was high in leaf-expansion and flowering period,then decreased since fruit growth period,but increased again in the end of fruit expanding period,and then decreased after harvest.The content of potassium,calcium and magnesium was low in leaf-expansion and flowering period,then increased in fruit bearing and expanding period,and decreased again at different levels in fruit mature period,and then increased rapidly after harvest.