摘要
研究结果表明，形成小老树的主要原因是土壤水分亏缺、水分利用率低和土壤肥力不足。小老树改造的途径主要是提高水分利用率和增加土壤肥力，更替树种也会取得一定效果。
The results show that the main causes of small-old trees are the soil water deficiency,the low water utilization rate and the low fertility in soil.The transform methods includ increase of water utilization rate and fertilizer in soil.To reeplace some tree species will also be effective measures. \ \
出处
《干旱区资源与环境》
CSCD
1997年第4期73-80,共8页
Journal of Arid Land Resources and Environment
关键词
水利利用率
土壤肥力
小老树
防护林
water utilization rate,water deficiency,soil fertility,small-old trees.
