第四纪红壤侵蚀区优良水土保持草本植物的选择与评价

Study on the selection and evaluation of grasses for soil and water conservation in the red soil area

在江西德安的第四纪红壤侵蚀区选择10种草本植物进行3年的定位试验,通过对出苗率、成活率、平均分蘖数、覆盖度、地上部分浸水容重、根系鲜质量、地上部分生物鲜质量、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,从中优选出生长良好的百喜草Palspalum notatum、画眉草Eragrostis pilosa、黑麦草Lolium perenne、狗牙根Cynodon dactylon、假俭草Eremochloa ophiuroides、宽叶雀稗Paspalum wettsteinit和苏丹草Sorghum sudauense7种草本植物,适合推广种植。

Ten grass species were selected and grew in red soil erosion area,De′an County,Jiangxi Province,to test their ability on water and soil conservation for three years.The parameters including rate of seedlings emergence,survival rate,average tiller number,vegetation coverage,fresh weight of root,above ground biomass,soil organic matter etc.were used to evaluate these 10 grasses through Analytic Hierarchy Process（AHP） and Fuzzy Mathematics.The result showed that the following 7 grasses,Palspalum notatum,Eragrostis pilosa,Lolium pereme,Cynodon dactylon,Eremochloa ophiuroides,Sorghum sudauense and Paspalum wettsteinit,could grow well and were proper for extension in the similar areas.