论文部分内容阅读
对防护林立地土壤肥力演替规律进行初步研究的结果表明 ,随着防护林生长年限的增长 ,土壤肥力状况总体趋于良好。土壤水、肥、气、热等性质都得到了改善 ,更有利于植物的生长
Preliminary studies on succession of soil fertility of shelterbelt showed that soil fertility tended to be good with the growth of shelterbelts. Soil water, fertilizer, gas, heat and other properties have been improved, more conducive to plant growth