三种禾亚科植物在南方水蚀荒漠地区的适应性比较

Adaptability Comparison of Three kinds of Agrostidoideae in the South Desertification Area by Water Erosion

研究类芦、斑茅、芭芒三种禾亚科植物在福建省长汀县河田镇朱溪河流域水蚀荒漠区生长情况,结果表明:类芦生长最好,全年均有一定的生长,进入冬季,其生长量还占全年生长量的25.3%.与斑茅和芭芒相比,类芦地上部分叶鲜重分别高20.97%和70.51%,且根系分布最深,深度可达180 cm以上,各层根系分布均匀,但物候期与其他两种植物相比无明显差异.因此,类芦在该区域有很好的适应性,可应用于该区域的水蚀荒漠化治理.

The selections of the Vegetation which are used to control desertification by water erosion are of great importance. This paper researches growth status of three kinds of graminaceous subfamily, which are Neyraudia reynaudiana.Saccharum arundinaeeum Retz and Miscanthus sinensis Anderss,in Zhuxi river basin Hetian Town of Changding County, Fujian Province. The results indicate the best growth of Neyraudia reynaudiana, with 25.3 percent of full year growth in the winter. Above-ground fresh leaf weight of Neyraudia reynaudiana reaches 70.51% and 20. 97% respectively than those of Saccharum arundinaceum Retz and Miscanthus sinensis Anderss, and the distribution of the deepest roots resehes 2. 3 meters below the uniformly distributed root system. The phenophase of Neyraudia reynaudiana, compared with the other two plants shows no significant difference. The conclusion shows that Neyraudia reynaudiana in the region has a very good adaptation and can be applied to control desertifieation by water erosion.