落叶松人工林抚育间伐技术的研究.pdfVIP

25 3 　　　 Vol.25 No.3 2009 5 FOREST ENGINEERING May, 2009 1, 2 1 ＊ 施双林 , 薛　伟 (1., 　150040;2., 　150008) 　　　:以落叶松人工林为对象来确定抚育间伐各主要技术指标, 包括抚育间伐开始期、 间隔期、 结 期 和抚育间伐强度以及采伐木的确定。 调查结果表明:落叶松人工林的首次间伐在 15 a 时最佳;经初次间伐后, 再次间伐的间隔期适宜时间为5 a;树龄达到35 a 时应停止抚育间伐;林木的不同生长阶段应采取不同的间伐强 度;利用三角形选树法可使林木对土地和空间的利用率达到最大。 :落叶松;人工林;抚育间伐技术 :S754　　:A 　　:1001-005X (2009)03-0053-04 Study on Technology of Intermedi ate Cutting of the Larix g mellini Plantation Shi Shuanglin (1.No theast Fo est y Unive sity, Ha bin 150040;2.Fo est y Indust y Gene al Bu eau of Heilongjiang P ovince, Ha bin 150008), Xue Wei (No th- east Fo est y Unive sity, Ha bin 150040) Abstract:Taking the Larix gmellini plantation as the object, each main technical index was dete mined, including the ini- tial pe iod, the plastoch one, the end phase, and the intensity of inte mediate cutting as well as the dete mination of felling t ees. The investigation esults showed that the initial optimum inte mediate cutting pe iod was at the 15th yea .Afte the p ima y inte - mediate cutting, 5 yea s was the feasible time to ca y out the inte mediate cutting again.When the t ees ages achieved 35, the in- te mediate cutting should be stopped.Diffe ent intensity of inte mediate cutting should be adopted acco ding to diffe ent g owth phases of fo est.In o de to achieve the biggest ope ating facto of the land and the space, the t iangle method can be used to choose the woods which should be cut off Key words:Larix gmellini;plantation;thinning techniques 1　　 , , , , , , , , “” 。, ;, , , , , 。 , , , 。 , , 、