摘要
对光皮桦和青冈栎幼苗进行硝酸还原酶活力、氨基态氮含量及全氮含量测定，结果显示光皮桦的三项生理生化指标均明显高于青冈栎。硝酸还原酶活力在光皮桦各营养器官中的分布大小是叶＞根＞茎；在青冈栎各器官的分布是叶最高，茎其次，根最低。氨基态氮含量在两树种的分布情况与硝酸还原酶活力类似。生长盛期的硝酸还原酶活力及氨基态氮含量达到高峰。研究表明光皮桦的氮素同化能力和贮藏能力高于青冈栎，因此营养生长旺盛。
Nitrate reductase activity,amino-acid nitrogen and total nitrogen content of Betula luminifera are obviously higher than that of Cyclobalanopsis glauca. Distribution of NR activities of Cyclobalanopsis glauca with leaf's>stem's>root's in various organs is quite different from that of Betula luminifera with leaf's>root's >stem's. Distribution of amino-acid nitrogen content are similar to that of NR activities. It indicates that capabilities of nitrogen assimilation and storation of Betula luminifera are higher than that of Cyclobalanopsis glauca and its growth keeps active.
出处
《湖北林业科技》
1998年第4期8-11,共4页
Hubei Forestry Science and Technology
关键词
光皮桦
青冈栎
硝酸还原酶
氨基态氮
苗期
Betula luminifera,Cyclobalanopsis glauca, Nitrate reductase activity,amino-acid nitrogen content, total nitrogen content
