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针对当前存在的“重造轻管”片面认识,笔者进行了低产林分改造的效益分析,这在省内具有普遍意义。本文根据经济学原理,计算分析了各项技术经济效果指标。经过5年改造的河滩林地生产率达到982.4元/亩、林地年均盈利率为146.68元/亩·年、劳动生产率达到13.25元/工日、资金利润率为7.28元/元、科研投资纯收入增量达172.0。另外,对河滩林每年拦截泥沙量、落淤厚度、防风固沙改善农田小气候等生态效益也作了估算。
In light of the current one-sided understanding of “reconstructing light tubes”, the author conducted an analysis of the benefits of low-yielding forest transformation, which has universal significance in the province. Based on the principle of economics, this paper calculates and analyzes the technical and economic performance indicators of each project. After 5 years of renovation, the productivity of riverside forests reached 982.4 yuan / mu. The average annual profit rate of woodland was 146.68 yuan / mu · year. The labor productivity reached 13.25 yuan / day and the capital profit rate was 7.28 yuan / The amount of 172.0. In addition, the ecological benefits such as interception of sediment, siltation and silt thickness, and windbreak and sand fixation to improve farmland microclimate are also estimated.