摘要
本文应用化学分析方法研究了落叶松水曲柳混交林叶、枝、皮营养元素含量及季节动态变化。结果表明,大量元素和微量元素含量及变化与林木生长和叶的生理生态活动有关。两树种叶中P,Ca的变化规律非常明显,差别较大。在水曲柳枝中,N,K,Ca在8月初减少到最低程度;而落叶松枝中N,K在6月初降到最低。在落叶松皮中,Ca的含量不断减少,其它元素含量变化与叶的含量变化相关。两树种枝中元素含量相近,而叶中含量差别较大。
The seasonal dynamic of nutrient elements in leaves, branches and bark of Larch and Ash in mixed forest were studied in this paper. The results show that the content of macro-elements and micro-elements have close relations to the growth and physiological activities of the trees. The dynamic principle of P and Ca in leaves is significant. The content of N, K and Ca in branch of Ash is lower in August, N,K in branch of Larch is lower in June, due to the growth and physiological activities. The content of Ca in bark of Larch decrease from beginning period to the ending period of growth, and other nutrient elements are variant with the contents in leaves. Comparing the two species, the content of nutrient elements in branch is equal approximately, but different obviously in leaves.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1991年第S1期244-250,共7页
Journal of Northeast Forestry University
关键词
混交林
水曲柳
落叶松
营养元素
Mixed forest
Manchurian ash
Larch
Nutrient elements