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杉木是我国南方最主要用材树种。在南方林区山地坡度大,雨量充沛且相对集中的条件下,传统杉木营林制度环节中一些不合理的人为措施加剧幼林地水土流失,导致土壤结构恶化,土壤肥力下降。本文通过对传统杉木营林制度多环节:劈草炼山、整地造林、幼林抚育、混农林业等营林措施中水土流失状况,进行全面比较分析,提出对传统营林制度改进措施,这对减少杉木幼林地水土流失,维持林地地力,促进杉木持续速生丰产及调动林农积极性,繁荣山区经济具有较大的指导意义。
Chinese fir is the most important timber species in southern China. Under the conditions of large mountain slope, abundant rainfall and relatively concentrated conditions in the mountainous areas of southern China, some unreasonable man-made measures in the traditional Chinese fir forest management system aggravate soil erosion in the young forestlands, leading to deterioration of soil structure and decline of soil fertility. In this paper, we make a comprehensive comparative analysis of the soil and water loss in the management of traditional Chinese fir plantations, including multi-step control of forestation, grass cutting, afforestation, young forest tending and agroforestry, Reduce the soil erosion of young forests of Chinese fir, maintain the ground force of woodland, promote the continuous fast-growing and high-yielding Chinese fir plantation and mobilize the enthusiasm of forest farmers, and promote the economy of mountainous areas with greater guiding significance.