论文部分内容阅读
本研究结果指出 ,龙须草具有较好的蓄水作用 (包括草层截雨、土壤贮水 )和保土作用 (包括根系固土、防治水土流失 )。其中截雨作用效果大小 ,在草层覆盖率为 92 %以上的情况下主要取决于草层厚度 ,草层厚度越大 ,截雨作用效果越大 ;土壤贮水作用效果大小 ,主要取决于草层覆盖率和根系生长量 ,草层覆盖率和根系生长量越大 ,土壤贮水作用效果越大 ;根系固土作用效果大小 ,主要取决于根系生长量 ,根系生长量越大、根系固土作用效果越大 ;而防治水土流失作用效果大小 ,主要取决于草层覆盖率和降雨量 ,在草层覆盖率大于 84% ,而且日降雨量小于或等于 79.3mm的情况下 ,不出现水土流失
The results of this study indicate that asparagus has good water storage effects (including grass-cutting, soil water storage) and soil conservation (including root soil fixation, soil erosion control). Among them, the effect of intercepting rain is large and depends on the thickness of grass layer when the coverage of grass is more than 92%. The larger the thickness of grass layer, the greater the effect of intercepting rain; the effect of soil water storage depends on the grass The effect of soil water storage was greater when the coverage of soil layers and root growth, grass cover and root growth were greater. The effect of root soil fixing effect was mainly determined by root growth, the greater the root growth, The effect is greater; and the effect of prevention and control of water and soil loss effect size, mainly depends on the grass cover and rainfall, grass coverage is greater than 84%, and the daily rainfall is less than or equal to 79.3mm case, no soil erosion