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防风林的现状日本北海道农田防风林,自古与顿田兵时期农田开发相共存.1896年在道厅制定了《殖民地区划设施规程》,有计划地进行防风林带的设置.据统计,1981年防风林面积为40,885公顷(包括国有林、民有林),比1963年增加了4,910公顷.近年来,由于农业现代化,水田、旱地防风林砍伐严重,特别是北海道东部斜网地带旱地砍伐更为突出,致使风蚀危害增大.其原因是人们对防风林的价值尚未充分理解.笔者关于农田防风林研究的成果认为:农田防风林对改善气候有良好的效果.因此如何由采伐向造林方向转变,值得林业和气象专家研究探讨.防风林的效果农田防风林,根据防灾的目的,概略地
The situation of windbreak The farmland windbreak in Hokkaido, Japan, coexisted with the development of farmland during the period of Duntian Bing. In 1896, the “Regulations for Colonial Zoning Facilities” was formulated and the arrangement of windbreak was planned. According to statistics, the area of windbreak in 1981 was 40,885 hectares (including state-owned forests and private owned forests) increased by 4,910 hectares compared with 1963. In recent years, as a result of agricultural modernization, deforestation in dry paddy fields and paddy fields has been severely deforested, especially in dry slopes in eastern Hokkaido, resulting in increased wind erosion The reason is that people have not yet fully understood the value of windbreaks.The author of the study on farmland windbreak believes that: Windbreaks in farmlands have good effect on climate improvement, so how to change from harvesting to reforestation is worth to be discussed by forestry and meteorologists. Effect of windbreak Forest farm windbreak, according to the purpose of disaster prevention, roughly