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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。
In the 29-year-old manchurian ash larch forest and mixed forest. The net bag method was used to study the decomposition of dead leaves. Through the decomposition of la. The quality loss rate of pure ash was 66.0%, that of mixed forest was 41.5%, and that of pure larch was 25.7%. Stage of mass loss rate of the three stands are May 5 to July 5 the largest. July 6 ~ September 5 second. November 6 ~ the second year of May 8 lowest. The simulation study shows. Pure ash will need 95% decomposition of pure leaves to be 2.8a; mixed forest to be 5.3a; pure larch need to be 10.0a. The determination of nutrient content of dead leaves shows that during the decomposition process of dead leaves. K leaching loss; N, P, Ca, Mg less loss: Fe, Cu, Zn content increased.