不同氮素形态配比对网纹甜瓜干物质分配和氮代谢的影响

Effects of different nitrogen forms on the dry matter accumulation and leaf nitrogen metabolism of muskmelon

摘要: 该文研究了4种氮素形态配比(NO^-₃-N∶NH⁺₄-N分别为100∶0，75∶25，50∶50和25∶75)对基质栽培网纹甜瓜(品种为“春丽”和“蜜玲珑”)干物质积累和氮代谢的影响。结果表明,不同氮素形态配比影响了植株各器官干重占全株干重的百分比。随氮素形态中氨态氮比例的增加，叶片中硝酸还原酶、硝酸盐含量和可溶性蛋白质含量逐渐降低，而游离氨基酸含量则在NO^-₃-N∶NH⁺₄-N为50∶50的处理中最高。

Abstract: Effects of four nitrogen forms (NO^-₃-N∶NH⁺₄-N were 100∶0，75∶25，50∶50 and 25∶75, respectively)on the muskmelon (cv. Chunli and Milinglong) plant dry matter accumulation and leaf nitrogen metabolism were investigated. The results showed that different nitrogen forms significantly affected the dry matter accumulation percentage in different plant organs. Leaf nitrate reductase, nitrate content and soluble protein content decreased with the increase of ammonium nitrogen form, whereas the highest leaf free amino content was obtained in the treatment of NO^-₃-N∶NH⁺₄-N(50∶50).