南方红壤地区种植龙须草对土壤质量的影响

通过对10年生龙须草地与自然野生草地和柑橘地3种不同土地利用方式的比较，对土壤的化学性状、物理性状、生物学性状以及植株生长的小气候环境进行了全面的调查分析。结果表明，10年生龙须草地土壤物理性状、化学性状、生物学性状和草地小气候环境都有不同程度的改善。结果还表明，土壤微生物数量在不同的季节呈现出有规律的动态变化，夏季最高，冬季最低，春、秋两季处于中间，而且龙须草地土壤微生物数量的季节性波动不如自然野生草地的波动大；龙须草地四种土壤酶的活性均比自然野生草地的高。从土地持续利用的角度考虑，再加上龙须草自身有着良好的经济效益和水土保持效益，在中国南方红壤地区种植龙须草是一种较好的土地利用模式。

Effect of Eulaliopsis binata plantation on soil quality in red soil region of southern China

The area of red soil in southern China is 2.112×10~6 km~2, accounting for 22% of the total area of China. Because of rich light, heat and water resources, this region is a major grain production base in China, and its potential for agricultural development is very great. However, the amount of water loss and soil erosion in this region is more than half of the total in China. Moreover, due to the unreasonable exploitation of mountainous resources as well as the relative concentration of rain seasons, the ar...