杉木林间伐强度试验20年生长效应的研究  

Growth Effect of Intermediate Cuttings Intensity Experiment for Twenty Years in Cunninghamia lanceolata

作　　者：张水松[1] 陈长发[2] 吴克选[2] 占有生[2] 何寿庆[2] 

机构地区：[1]福建省林业科学研究院,福州350012 [2]江西省林业科学研究院,南昌330032

出　　处：《林业科学》2005年第5期56-65,共10页Scientia Silvae Sinicae

基　　金：江西省科委1976年重点项目部分研究内容。

摘　　要：1976年6月在江西省奉新县(磾)下林场开展间伐强度对杉木林生长效应的定位研究,供试林分10年生,1996年11月,历时20年.结果表明:强度、中度、弱度间伐林分平均树高及其定期生长量均比对照有所提高,增加约3%～8%,但定期生长量无显著差异,间伐不能有效促进树高生长.间伐林分平均胸径及其定期生长量比对照分别增加约7%～19%和6%～28%,均显著或极显著大于对照,间伐可有效促进胸径生长.间伐林分总断面积及其定期生长量比对照分别增加约4%～6%和1%～7%,但间伐强度之间无显著差异;间伐林分保留木断面积小于对照,间伐不能有效增加林分总断面积、保留木断面积及其生长量.间伐林分单株材积及其定期生长量于伐后5年和8年即有显著或极显著差异,间伐可以有效促进林分个体生长量.间伐林分单位面积材积总生长量比对照增加约2%～4%,保留木材积、活立木主伐材积及其定期生长量与对照比较增减值均在允许误差范围之内,差异不显著,间伐不能有效增加材积生长量及其总产量.按生长效果而言,杉木林实行占株数40%左右强度间伐为宜.The position study on the effect of the intermediate cuttings intensity on Cunninghamia lanceolata stand growth was carried out on Zaoxia Forest Farm of Fengxin County, Jiangxi Province in June, 1976. The tested stand was 10 years old. The study had been carried out for 20 years and ended in November, 1996. The experimental results indicated that the average tree height and its periodic increment of the stand with the heavy, moderate or light intermediate cuttings increased by 3 % ～ 8 % over those of the check, but the periodic increment difference is not significant, and the intermediate cuttings was unable to effectiviely promote the growth of the tree height. The average DBH and its periodic increment of the intermediate cuttings stand increased by 7 % ～19 % and 6 % ～ 28 % respectively as compared with those of the check and were higher significantly or extremely than those of the check. The intermediate cuttings effectively promoted the growth of the DBH. The total basal area and its periodic increment of the intermediate cuttings stand increased by 4% ～ 6% and 1% ～ 7% respectively as compared with those of the check, but there was no significant difference among the intermediate cutting intensity, the basal area of remaining trees of the intermediate cuttings stand was less than that of the check, and the intermediate cutting could not effectively increase the total basal area of the stand, basal area of the remaining trees and their increment. The individual volume and its periodic increment of the intermediate cuttings stand were significantly different or extremely significantly different in 5 years and in 8 years after the felling,which might effectively promote the individual increment of the stand. The unit-area total volume increment of the intermediate cutting stand increased by 2% ～4% as compared with that of the check, the increase or decrease values of the remaining tree volume, living tree final-felling volume and their periodic increment were all within the allowable error scope as c

关 键 词：杉木林 间伐强度 生长效应 

分 类 号：S753.513[农业科学—森林经理学]