红壤侵蚀区优良水土保持草本植物的选择及评价

Selection and Evaluation of Excellent Herbs for Soil and Water Conservation in Eroded Area of Red Soil

选择18种草本植物在江西宁都的花岗岩侵蚀区和德安的第四纪红壤侵蚀区进行了4年的定位试验,通过对出苗率、成活率、平均分蘖数、覆盖度、枯落物的浸水容量、根系鲜重、地上部分生物鲜重、有机质等指标进行观测,并采用层次分析法和模糊数学方法对试验品种进行评价,结果表明:百喜草、糖蜜草、柱花草、宽叶雀稗、棕叶狗尾草、鸡眼草、马唐7种草本植物在花岗岩侵蚀区生长良好;百喜草、画眉草、黑麦草、狗牙根、假俭草、宽叶雀稗和苏丹草7种草本植物在第四纪红壤侵蚀区生长良好。

The paper selects 19 varieties of herbs and conducts positioning tests for 4 years in the granite erosion region of Ningdu and the quaternary eroded area of red soil of De′an in Jiangxi Province.It observes the indexes of the emergence rate,survival rate,average tiller number,coverage rate,submerged bulk density above-ground,fresh root weight,biological fresh weight above-ground and organic matter,and evaluates the tested varieties by using the methods of layer analysis and fuzzy mathematics.The outcomes show that Paspalum notatum,Melinis minutiflora,Stylosanthes guianensis,Paspalum wettsteinii,Setaria palmifolia,Kummerowia striata,Digitaria sanguinalis can grow well in the granite erosion region;Paspalum notatum,Eragrostis pilosa,Lolium perenne,Cynodon dactylon,Eremochloa ophiuroides,Paspalum wettsteinii,Sorghum sudanense can grow well in the quaternary eroded area of red soil.