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我们在宁化、长汀两县利用三种不同品种组合进行草地建植试验,以探讨严重侵蚀劣地建植草地的草种组合与水土保持效益。该地属亚热带气候,土壤母质分别为紫色土和红壤土。试验结果表明,禾本科草与豆科灌木的组合比禾本科草与豆科草的组合及纯禾本科草的组合好;草地建植23个月后,土壤侵蚀总量比对照减少约91％倍,枯草期低温条件下土壤细菌类和真菌类的微生物数量比对照分别增加5.5倍和9.3倍,土壤速效养分、有机质及水分含量有明显提高,马尾松生物量增长3.5倍。试验取得满意的结果,为广大严重侵蚀劣地建植草地提供一个成功的方法。
In Ninghua and Changting counties, we used three different combinations of cultivars to carry out grassland planting experiments to explore the combination of grass species and benefits of soil and water conservation in the severely eroded grasslands. The area is subtropical climate, soil parent material purple soil and red soil, respectively. The results showed that the combination of gramineous and leguminous shrubs was better than that of gramineous and leguminous plants combined with pure gramineous grass. After 23 months of grassland establishment, the total soil erosion decreased about 91% Compared with the control, the number of microbes in soil bacteria and fungi increased by 5.5 times and 9.3 times, respectively. The content of available nutrients, organic matter and water in soil increased significantly. The biomass of Pinus massoniana increased 3.5 times. Test results obtained satisfactory, for the vast number of severely encroached areas to provide grassland to provide a successful method.