红松人工林不同间伐强度效果分析

对不同间伐强度红松人工林的林分生长状况,林下植被生物多样性以及林下土壤的养分状况进行调查研究。结果表明:极强度间伐、强度间伐能有效提高林分直径生长量,增加大径材的出材量,缩短培育大径材的时间,及早达到木材采伐标准。但间伐强度过大影响整个林分的蓄积量。强度间伐有效提高林下植被的丰富度指数和多样性指数,植被状况良好。极强度间伐区土壤的养分状况最好,维持较高的土壤肥力。间伐有利于红松人工林地的可持续利用。

The effect of different thinning intensity on Pinus koraiensis plantations

In this paper,the growth,understory biodiversity and soil nutrient of Pinus koraiensis plantations with different thinning intensity were investigated.The results show that greatly heavy thinning and heavy thinning can effectively increase stand growth in diameter increment and yield of large-diameter timber,reduce cultivation time for large-diameter timber.But too much intensive thinning influence entire stand volume.Heavy thinning can effectively enhance the indexes of abundance and biodiversity under the forest.The soil nutrient is the best under forest with greatly heavy thinning.Thinning is conducive to the sustainable development of P.koraiensis plantations.