摘要
在２９年生的水曲柳落叶松纯林和混交林中．用网袋法研究了枯叶的分解动态。通过ｌａ的分解。水曲柳纯林枯叶质量损失率为６６．０％；混交林为４１．５％；落叶松纯林为２５．７％。阶段质量损失率三种林分均是５月５日～７月５日最大．７月６日～９月５日次之．１１月６日～第２年５月８日最低。经模拟研究表明．水曲柳纯林枯叶９５％分解需２．８ａ；混交林需５．３ａ；落叶松纯林需１０．０ａ、通过对枯叶养分含量的测定表明：在枯叶分解过程中．Ｋ大量淋失；Ｎ、Ｐ、Ｃａ、Ｍｇ损失较小：Ｆｅ、Ｃｕ、Ｚｎ含量有所增加。
The dynamics of litter decomposition in 29-year-old larch and ash pure and mixture plantation standswere studied by using nylon mesh method. The one-year weight loss rates of litter in pure larch, pure ashgb the mixture stand were 25. 7%. 66. 0% and 41. 5% respectively. The litter weight decreased most quicklyfrom May 5 to July 5. and most slowly from November 6 to next May & in all the three stands. Thesimulated time spans needed for 95% weight loss of litter in pure larch. Pure ash and the mixture stand were10.0. 2. 8 and 5. 3 years respectively. The analysis of the nutrients content in the decomposed litterdemonstrated that during the decomposition process. much more potassium was removed by leachingcompared with N, P, Ca and Mg. The content of Fe, Cu and Zn had the trend of increase.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1999年第4期5-8,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金!39230280
关键词
水曲柳
落叶松
混交林
凋落物
枯叶
分解
sh (Fraxinus mandshurica)
Larch(torix olgensis)
Mixture plantation
Litter
