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杉木３种不同造林模式林地的水、土、肥流失表现为“传统型”＞“世行型”＞“生态型”的规律。用混合型数量化模型进行因素分析结果表明：炼山是影响杉木幼林地水土流失的首要因子，其次是整地方式、套种绿肥、栽植点配置、幼林抚育方式等人为营林措施，保留采伐剩余物、套种绿肥等增加林地地表覆盖的措施，均有很好的防止水土流失效果。并提出改革现行的营林技术措施，着手研究“生态经济型”的栽杉新模式。
The loss of water, soil and fertilizers in three different afforestation modes of Chinese fir showed the regularity of “traditional type”> “World Bank type”> “ecological type”. The results of the factor analysis using the hybrid quantitative model show that refining is the most important factor affecting the soil erosion in the young forest of Cunninghamia lanceolata, followed by man-made measures such as site preparation, intercropping of green manure, planting site allocation and young forest tending mode, , Intercropping green manure and other measures to increase the coverage of forest land, have a very good effect of preventing soil erosion. And proposed to reform the existing technical measures for silviculture, and proceed with the study of the new mode of “fir-fir” eco-economy.