摘要
调查分析了挖断根沟前后距林带近处和远处农作物的产量。结果表明 :在山西省北部半干旱风沙区 ,存在着林带胁地的现象 ,挖断根沟是一项较好的克服胁地影响的措施 。
An analysis on the crop output near and far from the shelter forest belt with and without root cutting ditch concluded that the forest belt has the negative influence on the farm land in the simi arid regions of northern province Shanxi.The better measure overcoming the influence is the root cutting ditch which can keep the crop output from reducing
出处
《山西林业科技》
2001年第1期38-40,共3页
Shanxi Forestry Science and Technology
关键词
农田防护林
胁地
断根沟
shelter forest belt
negative influence on the farm land
root cutting ditch
