摘要： 收获前,叶面喷施氨基酸(甘氨酸、异亮氨酸和脯氨酸)对不结球白菜生长及品质的研究表明,不结球白菜的生长基本不受氨基酸的影响,仅甘氨酸和异亮氨酸混合可显著增加植株产量。除三种氨基酸混合降低不结球白菜体内硝酸盐含量,叶面喷施氨基酸明显增加叶片及叶柄硝酸盐含量;叶片可溶性蛋白质含量各处理之间差异不大;游离氨基酸含量增加达65.82%～84.81%;而可溶性糖含量明显减少。叶片硝酸还原酶活性降低,全氮含量增加。

关键词: 不结球白菜, 氨基酸, 硝酸盐, 品质

Abstract: Before harvest,the research was carried out on grow th and quality of nonheading Chinese cabbageby foliar spraying amino acid(g lycine,isoleucine and proline ). The main result s w ere as follow s: it s grow thchanged slightly,but the mixture of g ly cine and isoleucine increased yield signif icant ly (p< 0. 05). Foliar sprayingamino acid enhanced content of nitrate in leaf blades and pet ioles of non-heading Chinese cabbage,how everthe mix ture of three kinds of amino acid had reducing effect. Soluble protein in leaves was no signif icant differenceobserved,f ree amino acid increased 65. 82%~ 84. 81%,but soluble sugar decreased markedly (p< 0. 05).N it rate reductase act ivity (NRA) in leaves became weak,content of tota-l N decreased.

Key words: Non-heading Chinese cabbag e, Amino acid, Ait rate, Quality

中图分类号: 

• S643.01