氮钾营养对长豇豆豆荚产量品质及几种酶活性的影响

EFFECT OF N,K NUTRITION ON YIELD, QUALITY AND ACTIVITIES OF SOME ENZYMES IN ASPARAGUS BEAN

在广州秋季以长豇豆锦穗白豆角品种为材料，设置低氮低钾（Ｎ１０Ｋ１０）、低氮高钾（Ｎ１０Ｋ２０）、高氮低钾（Ｎ２０Ｋ１０）和高氮高钾（Ｎ２０Ｋ２０）４个处理，研究氮钾营养水平对长豇豆豆荚产量，品质以及叶片乙醇酸氧化酶，核酮糖－１，５－二磷酸加氧酶和硝酸还原酶等活性的影响。结果表明低氮低钾处理的豆荚产量与其他处理无明显差别，但品质稍差。增钾可提高豆荚产量和品质，增氮无增产意义。长豇豆生育期间ＮＲ、ＧＯ和ＲｕｂｉｓＯ活性均呈单峰曲线变化，ＮＲ活性在开花结荚初期最高，ＧＯ和ＲｕｂｉｓＯ活性则抽蔓期最高。４个处理对叶片ＮＲ、ＧＯ和ＲｕｂｉｓＯ活性的影响一致，低氮低钾处理最低，增氮或增钾都提高它们的活性，以增氮为明显。

ffect of N,K nutrition on pod yield, quality and activities of glycolate oxidase (GO), RuBP oxidase(RubisO) and nitrate reductase(NR) were studied with 4 treatments(N10K10, N10K20, N20K10, N20K20) in asparagus bean [Vigna unguiculata Wssp sesquipedalis (L)Verd] cvJingshui in autumn of Guangzhou Pod yield had no significant difference between N10K10 treatment and each of the other three treatments, but pod quality in N10K10 treatment was a little worse than that in other treatments High K increased pod yield and improved pod quality During the growth of asparagus bean,NR activity reached the maximum at early blooming and podding stage, activities of GO and RubisO reached the maximum at vine growth stage Activities of NR, GO and RubisO in N10K10 treatment were the lowest, high N or K increased the activities, especially high N 