京杭大运河堤相关论文
在苏北京杭大运河堤引种栽培杉木研究结果表明,粗放经营林分,19a时H12.30m,D1.319.1cm,立木蓄积量224.0m3/hm2,地上部分生物量(干重)达147.12t/hm2,中径材占51.1%,小径材占46.6%;集约管抚林分,13a时H11.90m,D1.315.1cm,立木......
在苏北京杭大运河堤引种种栽培杉木研究结果表明,粗放经营林分,19a时H12.30m,D1.319.1cm立木积量224.0m^3/hm^2,地上部分生物量达147.d12t/hm^2中径材51.1%,小径材占46.65;集约管抚林分,13a时H11.90m,D1.315.1cm,立木蓄积量......