杉木人工林地力维持及更新技术研究

通过对土壤和杉木幼林调查分析结果表明 ,炼山、全垦初期表层土壤水分物理状况得到一定的改善 ,速效性养分大量增加 ;1年后 ,土壤表层水分物理性能变差 ,速效养分流失 ,土壤肥力逐渐下降。不同营林措施组合处理的杉木幼林生长 ,在树高、胸径、单株材积平均生长量上有差异 ,经方差分析 ,胸径、单株材积生长量有显著性差异 ,而树高生长量差异不显著

Studies on the Soil Productivity Maintenance and Regeneration Technique of Cunninghamia lanceolata Plantation

The results of the survey and analysis of soil and Cunninghamia lanceolata young forest revealed that at the initial stage after the clearing by burning of the land and the overall site preparation,the physical status of soil moisture in the surface layer was improved to a certain extent and the rapidly available nutrient increased largely;but one year later the physical property of soil moisture in the surface layer turned poor,the rapidly available nutrient was washed away,and the soil fertility reduced gradually.The height,DBH and single tree volume average growth increment of C.lanceolata young forest with the combinative treatments of different silvicultural measures differed and through the variance test the differences of the DBH and single tree volume growth increment were evident.