【摘要】 对帽儿山林区水曲柳、落叶松等6种主要林分的年凋落量、凋落物组成及分解动态进行了观测。结果表明:(1)六种林分的年凋落量分别为水曲柳(5.57 t.hm-2)、蒙古栎(4.31 t.hm-2)、山杨(4.27 t.hm-2)、落叶松(4.08 t.hm-2)、红松(5.62 t.hm-2)、樟子松(5.56 t.hm-2);(2)六种林分其叶的年凋落量占年总凋落量的比例明显大于其它组分,是其凋落物中的主要组成部分;(3)经过近1 a时间的分解,测得6种林分凋落叶分解速率依次为:水曲柳>樟子松>落叶松>山杨>蒙古栎>红松;经模拟研究表明,水曲柳凋落叶95%分解需3.5 a;蒙古栎需8.0 a;山杨需6.7 a;落叶松需6.6 a;红松需8.8 a;樟子松需4.4 a。更多还原

【Abstract】 The annual litter fall production,composition and decomposition of the litter fall of six typical forest stands in Maoershan,Heilongjiang Province were studied in this paper.The results are as follows:(1) the annual litter production is in the sequence of Pinus koraiensis(5.62 t·hm-2),Fraxinus mandshurica(5.57 t·hm-2),Pinus sylvestris(5.56 t·hm-2),Quercus mongolica(4.31 t·hm-2),Populus davidiana(4.27 t·hm-2),Larix gmelinii(4.08 t·hm-2);(2) the litter production of leaves of six forests occupies a higher percentage in the annual total litter production than that of other components;(3) decomposition rates of leaf litter falls in the six forests are Fraxinus mandshurica > Pinus sylvestris > Larix gmelinii > Populus davidiana > Quercus mongolica > Pinus koraiensis.The simulated time spans for 95% weight loss of litter falls in Fraxinus mandshurica,Quercus mongolica,Populus davidiana,Larix gmelinii,Pinus koraiensis,Pinus sylvestris stands are 3.5,8.0,6.7,6.6,8.8 and 4.4 years,respectively.更多还原