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为了探明不同林龄马尾松人工林枯枝落叶层现存量、贮水量以及养分贮量的变化规律及其互相之间的关系,在桂西北乐里林场选择3种林龄段马尾松人工林分别建立标准地,对林地枯枝落叶物进行取样测定。结果表明:1)该区9～14a生马尾松人工林枯枝落叶层现存量为3.31～5.64t/hm2,最大净贮水量为4.48～10.19t/hm2,并随林龄的增大而递增。2)林地枯枝落叶层元素养分含量以N,Ca为最大,大约各占10种元素养分总含量的1/3～1/2;Mg,K元素含量次之;Mn,Fe,P,Zn,Cu,B元素含量微小。林地枯枝落叶层养分总贮量为70.66～98.82kg/hm2,随林龄的增大而递增。3)林地枯枝落叶层现存量、最大净贮水量以及元素养分总贮量分别与林龄存在密切的相关性,其回归方程各异。因此,可以根据不同林龄段来预测枯枝落叶层现存量、最大净贮水量和元素养分总贮量。
In order to ascertain the variation rules of stock, water storage and nutrient storage in the litter layer of Pinus massoniana plantations with different forest ages, and their relationship with each other, three kinds of stand age-selected Pinus massoniana plantations Respectively, to establish a standard, woodland litter samples were measured. The results showed as follows: 1) The existing litter layer of 9 ~ 14a Pinus massoniana plantation in this area was 3.31 ~ 5.64t / hm2, and the maximum net water storage was 4.48 ~ 10.19t / hm2 and increased with the increase of forest age . 2) Nutrient content of litter layer in forestland was the largest with N and Ca accounting for about 1/3 ~ 1/2 of the total nutrient contents of 10 elements; followed by Mg and K elements; Mn, Fe, P and Zn , Cu, B element content is small. The total nutrient content in the litter layer of forest was 70.66 ~ 98.82kg / hm2, which increased with the increase of forest age. 3) The existing amount of litter layer, the maximum net water storage and the total nutrient storage in forestland are closely related to the stand ages respectively, and the regression equations are different. Therefore, according to different age segments, the existing stock of litter, the maximum net water storage and the total nutrient storage can be predicted.