二次渐伐是把伐区的全部林木分二次采伐完的一种采伐方式,在伐完成熟林木的同时,也完成了森林更新。这是一种以森林更新为目的的采伐方式。二次渐伐的特点介于皆伐和择伐之间。它与皆伐不同处在于,皆伐是一次将成熟林木伐完,而二次渐代则分二次伐完;皆伐主要依靠伐后更新,而二次渐伐依靠伐前母树天然下种更新。二次渐伐与择伐不同处在于,二次渐伐有明显的更 The secondary deforestation is a kind of harvesting method that cuts all the trees in the cutting area into secondary deforestation. At the same time of cutting the mature trees, forest regeneration is also completed. This is a logging method for the purpose of forest renewal. The secondary tapering feature is between clear cutting and selective cutting. It differs from clearcutting in that clearcutting is done by cutting mature mature trees one at a time, and secondarily bypassed at the second finishings. Clearcutting relies primarily on post- Updated. The second difference between secondary and selective cutting is that the secondary cutting has obviously more