论文部分内容阅读
对毛竹不同经营类型的技术经济效果分析表明：不同松土深度的产值间具有极显著差异，松土以２５ｃｍ为最好，纯收入高；不同氮肥用量的产值间具极显著差异，每３３３ｍ２施用５ｋｇ、１０ｋｇ、１５ｋｇ、２０ｋｇ尿素，增值幅度分别为３２．５５％、７８．２５％、１０２．４６％和１３６．５６％，边际投入产出比分别为１：７．６、１：１．０８、１：５．６、１：８．０，这个施肥范围属于施肥量－产值曲线的快速上升期；５种营林模式的△ＮＰＶ均大于零，劈山、松土、伐桩施肥、松土施尿素１０ｋｇ、松土施ＮＰＫ（５：２：３）配合肥的增值幅度分别是５５．２９％、９７．７１％、４２．３４％、１００％、１６２．８６％。
The results of technical and economic analysis on different management types of Phyllostachys pubescens showed that there was a significant difference between the yields of different planting depths, with the best 25cm for loose soil and the highest net income. The output of different nitrogenous fertilizers was significantly different, 5kg, 10kg, 15kg and 20kg urea, respectively, with the added value of 32.55%, 78.25%, 102.46% and 136.56% respectively. The marginal input-output ratios are 1: 7.6 and 1: 1 respectively. 08,1: 5.6,1: 8.0. The fertilization range belongs to the period of rapid increase of fertilizer amount-yield curve. The △ NPV of the five kinds of forest management models are all greater than zero. The added value of compound fertilizer with 10kg soil urea and NPK (5: 2: 3) soil fertilizers were 55.29%, 97.71%, 42.34%, 100% and 162.86% respectively.