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平原农区林木覆盖率,指的是平原地区所有树木(包括片林、防护林、四旁树、果树,甚至非林冠下的灌木)的树冠垂直投影面积的总和与总土地面积的百分比。这是一个常用的重要指数,尤其是平原农区通过努力可以达到的最大林木覆盖率是制订林业计划、编制农业区划等迫切要求掌握的重要指标。可能达到的林木覆盖率的大小,直接和土地利用状况,各类用地的绿化系数有关。土
The percentage of forest cover in plain agricultural areas refers to the sum of the vertical projected area of canopy of all trees in plain area (including patch forests, shelterbelts, four-sided trees, fruit trees, and even canopy under canopy) to the total land area. This is a commonly used important index. In particular, the maximum forest coverage that can be reached through hard work in the plain farms is an important indicator that is urgently required to formulate a forestry plan and make an agricultural zoning plan. The size of forest coverage that may be reached is directly related to the land use status and the greening factors of various types of sites. earth