四川林业科技
四川林業科技
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JOURNAL OF SICHUAN FORESTRY SCIENCE AND TECHNOLOGY
2012年
4期
61-63
,共3页
颜维正%刘勇涛%李华蓉%胡顺彬%黄丽丽
顏維正%劉勇濤%李華蓉%鬍順彬%黃麗麗
안유정%류용도%리화용%호순빈%황려려
杉木%采伐强度%生长量%林下植被
杉木%採伐彊度%生長量%林下植被
삼목%채벌강도%생장량%림하식피
Chinese fir%Cutting intensity%Growth%Understorey vegetation
通过对叙永大安林场杉木林不同采伐强度的试验研究结果表明:不同的采伐强度对树高、胸径和林下植被种类、盖度的影响都较明显,并随着采伐强度的增大而增大,对林分蓄积量的影响是随着采伐强度的增大而增大。但采伐强度增加到一定数值后,单位面积保留株数减少,蓄积增长量反而呈下降趋势。因此研究区适宜的采伐强度为21%~30%。
通過對敘永大安林場杉木林不同採伐彊度的試驗研究結果錶明:不同的採伐彊度對樹高、胸徑和林下植被種類、蓋度的影響都較明顯,併隨著採伐彊度的增大而增大,對林分蓄積量的影響是隨著採伐彊度的增大而增大。但採伐彊度增加到一定數值後,單位麵積保留株數減少,蓄積增長量反而呈下降趨勢。因此研究區適宜的採伐彊度為21%~30%。
통과대서영대안림장삼목림불동채벌강도적시험연구결과표명:불동적채벌강도대수고、흉경화림하식피충류、개도적영향도교명현,병수착채벌강도적증대이증대,대림분축적량적영향시수착채벌강도적증대이증대。단채벌강도증가도일정수치후,단위면적보류주수감소,축적증장량반이정하강추세。인차연구구괄의적채벌강도위21%~30%。
Researches were conducted on impacts of different cutting strength on the Chinese fir plantation in Xuyong Daan Forest Farm.The results showed that the effects of different cutting intensity on tree height,diameter at breast height and understorey vegetation types,coverage were more obvious,and with the imcrease of cutting intensity the stand volume effect would increase.But when the cutting intensity increased to a certain value,the retained bamboo number in the unit area would reduce,and the volume growth amount would also decrease.Therefore the suitable harvesting intensity in the studied area should be 21%~30%.