NH4+-N部分代替NO3--N对番茄生育中后期氮代谢相关酶活性的影响

被引:21
作者
董园园
董彩霞
卢颖林
缪辰
沈其荣
机构
[1] 南京农业大学资源与环境科学学院
关键词
NH4+-N; NO3--N; 番茄; 硝酸还原酶; 谷氨酰胺合成酶; 磷酸烯醇式丙酮酸羧化酶;
D O I
暂无
中图分类号
S641.2 [番茄(西红柿)];
学科分类号
摘要
采用砂培实验研究NH4+-N部分代替NO3--N对番茄的影响,结果表明:与全硝处理(100%NO3-)相比较,增铵处理(NH4+∶NO3-=25%∶75%)下番茄鲜果重显著提高;同时叶片内NO3--N含量随增铵而显著降低,叶片与果实内NH4+-N含量及果实的可溶性蛋白含量随增铵而升高;增铵条件抑制了叶片和果实的硝酸还原酶(NR)活性,提高了叶片和果实的磷酸烯醇式丙酮酸羧化酶(PEPcase)活性及叶片谷氨酰胺合成酶(GS)活性,但对果实的谷氨酰胺合成酶(GS)活性影响不大。上述结果表明,NH4+-N部分代替NO3--N可增加番茄产量,提高集约化基地的生产量。
引用
收藏
页码:261 / 266
页数:6
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