【摘要】 本文调查了不同林带结构的防风效应。应用数理统计的方法,随机抽取202个数据,建立一个林带结构防风效应的数学模式, 即:Y=0.19094α+27.53397T+1.36578L+1.84616V-18.89249,以综合分析的手段,探讨林带结构因子与防风效应的内在关系。同时,也进行了调节林带结构与防风效应关系的研究。结果表明,林网内的防风效应主要取决于林带的疏透度,与林带树种防风特性指标、林带宽度、风速和风向也有密切关系;人工调节林带结构的措施在农业生产上具有重大意义。更多还原

【Abstract】 The effectiveness of different patterns of shelterbelt in the Pearl River Delta was investigeted and a mathematical model of protective effect for the different types of structures of the shelterbelt,based on statistics by extracting 202 random data, has been constructed. viz; ( y = 0.19094a + 27.53397 T +1.36578 L + 1.84616V -18.89249) . An investidation was carried out into the inner relations between the factors of the shelterbelt structure and protective effect by means of integrated analysis. In the meantime,the relations between the adjustment of the shelterbelt structure and the protective effect were studied. The results showed that the windbreak effect within the network of shelterbelt depends mainly on the penetrability of the shelterbelts,the index of wind-resistance of different tree species, width of the shelterbelts, wind-speed and wind direction. It is shown that adjusting the belt structure is of great immediate significance to agricultural production.更多还原