THE PHYTOCOENOLOGICAL CHARACTERISTICS OF ARUNDINELLA SETOSA GRASS-LAND ON THE HILLS OF RED SOIL IN SUBTROPICAL ZONE AND ITS UTILIZATION
Kong De-zhen;Yang Bao-zhen, (Institute of Botany, Academia Sinica)
the grass-land dominated by Arundinella setosa is a type of communitywidely distributed on the hills of red soil in subtropical zone of China,especially on the hills of Taihe district, Jiangxi province. The soil ofthese hills is dry and barren. The floristic composition of the communityincludes about 84 species and is dominated by grasses including 3 species.The perennial herbs are the most basic life form in the community occu-pying about 41 percent of the total species. In general, the coverage of thecommunity is about 60 percent. The species saturation varies 12-14 species/m~2 dominated chiefly by xeromesophilous grasses. There are 3000-6000 kg/hain the production of fresh grasses. On the basis of difference of the envi-romental conditions and the man-made influence Arundinella setosa grass--land on the hills in Taihe can be divided into six basic types: 1. Arundinella setosa+Eulalia speciosa grass-land; 2. Arundinella setosa+Themeda triandra var. japonica grass-land; 3. Arundinella setosa+Ischaemun indicum grass-land; 4. Arundinella setosa+Eriachne pallecens grass-land; 5. Arundinella setosa+Eulalia quadrinervis grass-land; 6. Arundinella setosa+Ischaemum barbatum grass-land. At present this grass-land is utilized as cutting and grazing whichhave been caused the different levels of the soil erosion. It seems that itis suitable to take the approach closing hills and afforesting on the steep--slope of the hills and gradually to restore it into forest vegetation; Andon the gentle-slope of the hills where the condition is better, it is pos-sible to establish pasture and to combine it with cultured forage for deve-lopment of domestic animals, in order to satisfy a variety of the require-ment of the people.
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