贡嘎山地区不同植被枯落物对降水影响的初步研究

Preliminary Study on Influence of Different Vegetation on Precipitation Physics in Mt.Gongga Areas

对贡嘎山4种植被的枯落物层的截留量及滞后时间进行了研究。结果表明:①在渗润阶段,成熟针叶林的未分解枯落物滞后时间最长,未成熟针叶林的最短;阔叶林的半分解枯落物滞后时间最长,针阔混交林的最短;针阔混交林的全分解枯落物滞后时间最长,未成熟针叶林的最短;②达到饱和时的时间,未成熟针叶林的未分解枯落物滞后时间最长,成熟针叶林的最短;针阔混交林的半分解枯落物滞后时间最长,阔叶林的最短;成熟针叶林的全分解枯落物滞后最长,未成熟针叶林的最短;③在渗润阶段,同种植被的不同枯落物层的全分解层滞后时间最长,未分解层的最短;达到饱和时间,同种植被的不同枯落物层未分解层滞后时间最长,全分解层的最短;④在渗润阶段,4种植被的不同枯落物层的未分解层的截留量最小;在饱和阶段,4种植被的枯落物层的不同分解层的截留量表现的规律并不相同,未成熟针叶林和针阔混交林的未分解层截留量多,全分解层的截留量最少。

The rainfall interception and lag time of four kinds of vegetation litter in Gongga Mountain areas were studied. The results were as follows. （i） During seeping stage, the lag time of non-decomposed vegetation litters from the mature coniferous forest was the longest and that from immature coniferous was the shortest. The lag time of semi-decomposed litters from the broadleaf forest was the longest and that from the mixed forest of the coniferous and broadleaf was the shortest. The lag time of full-decomposition vegetation liners from the mixed forest of the coniferous and broadleaf was the longest and that from coniferous forest was the shortest. （ii） For the time of reaching saturation, the lag time of non-decomposed vegetation litters from immature coniferous was the longest and that from the mature coniferous forest was the the shortest, the lag time of the semi-decomposed litters from the mixed forest of the coniferous and broadleaf was the longest and that from broadleaf forest was the shortest; The lag time of full-decomposition vegetation litters from the mature coniferous forest was the longest and that from immature coniferous was the shortest. （iii） During seeping stage, the lag time of the full decomposition vegetation layer from the same vegetation was the longest and that non-decomposed vegetation layer was the shortest. For the time of reaching saturation, the lag time of non-decomposed vegeta- tion layer of rom the same vegetation was the longest and the full decomposition vegetation layer was the shortest. （iv） During seeping stage, the interceptionof non-decomposed vegetation layer from the same vegetation was the smallest. During saturation stage, the law of interception of the different decomposition layer of 4 vegetation litters was different.