论文部分内容阅读
通过建立２８个径流小区，对杉木幼林地水土保持措施效果的定位研究结果表明：杉木幼林地植被覆盖层的破坏是导致林地严重水土流失的主要原因．迹地采伐剩余物具有较大的涵养水源功能．保留采伐剩余物的杉木纯林、马尾松纯林及杉木×火力楠混交林迹地的土壤侵蚀量分别可比炼山迹地减少９９．１４％、９８．８０％和９８．２０％，在杉木炼山后及时间种绿肥可减少林地１７．５７％～５２．２５％的土壤侵蚀量，四种林地套种方式中以日本草×决明豆混播类型防治水土流失效果为最佳．
Through the establishment of 28 runoff plots, the results of the study on the effect of soil and water conservation measures on the young plantations of Chinese fir showed that the destruction of the vegetation cover in the young Chinese fir plantations was the main reason for the serious soil erosion. Log remnants have a larger water conservation function. The soil erosion amount of pure Chinese fir, Pinus massoniana and Cunninghamia lanceolata mixed forest with retained residues can be reduced by 99.14%, 98.80% and 98.20% respectively compared with that of the Lianmu site, After the time and time of green manure can reduce the amount of soil erosion 17.57% ~ 52.25% of the forest, the intercropping methods of the four kinds of forests in the mixed type of Japanese grass × Cassia beans prevention and control of soil erosion is the best.