绢毛相思与糖蜜草的混交效益

Mixed Benefits of Acacia Holosericea and Melinis Minueiflora Beauv

在人称“红色沙漠”的南方花岗岩风化区,水土流失严重,治理难度大,为探索其有效治理途径,作者于1986～1988年在这类土地上进行了绢毛相思与糖蜜草混交试验研究,结果表明:林草混交当年植被覆盖率达到90％;林草混交区的径流量和泥沙流失量分别比对照区减少51.53％和98％;林草混交可有效地提高土壤肥力,改善生态环境,且社会效益显著。

In the weathered granite region of south China called as 'red desert' by the people,the soil and water loss are very severe and management is vey difficult. In order to investigate a way of effective management, the author conducted an experimental study of plantation by mixing Acacia holosericea and Melinis Minueiflora Beauv on such kind of land in the period of 1986-1988. It is shown by the results that the ratio of vege- tation cover by mixing trees and grasses in the same year can reach 90%;the loss of water and sediment. in the mixed planted region is reduced by 51. 5% and 98% respectively comparing with that of checked area and; the soil fertility can be increased and ecological environment improved effectively by mixed plantation of trees and grasses.