摘要
在氮肥总量不变的情况下,分别于不同时期按不同比例施用氮肥,结果表明:在后期生长过程中,小麦旗叶叶绿素含量chl(a+b)总体呈现下降趋势,超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性呈现先升高后降低的趋势。后期适量施氮使植株体内保持高水平的保护酶活性,降低后期细胞膜脂过氧化水平,延长旗叶功能期。
By applying different ratios of nitrogen fertilizer in different periods on the basic of applying the same amount, the results showed that,in the latter period of growth,the content of Chl（a＋b）showed a generally downward trend, the activity of SOD and POD showed first increased then began to lower. In the latter part of growth, adequate nitrogen application could made the plants maintain a high level of activities of protective enzymes, dropped the membrane lipid peroxidation levels and extended functional period of flag leaves.
出处
《黑龙江农业科学》
2008年第2期63-65,共3页
Heilongjiang Agricultural Sciences
