摘要
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％。
Analysis on economic effect by different management indicated that output values with different depth of soil loosen had evident difference, the optimal depth was 25 cm. Output value with different N fertilizer application had evident difference, increase of output value with application of 5kg、10kg、5kg、20kg/333m2 were respectively 32. 55%、78. 25%、102. 46% and 136. 56%.The marginal input and output ratio was 1:7. 6、1:1. 08、1:1. 56 and 1: 8.0.Average NPV With 5 management techniques was higher than zero. Output value increase With leveling off hilltops、cutting stake and fertilizing、loosening soil and 10kg urea application、loosening soil and applicating NPK(5: 2: 3) was 55. 29%, 97. 71%,42.34%,100% and 162.86%.
出处
《浙江林业科技》
北大核心
1996年第1期1-9,共9页
Journal of Zhejiang Forestry Science and Technology
关键词
毛竹
净现值
技术经济效果
营林类型
Phyllostachys
pubescens
net value
economic effect
marginal analysis
