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一、平原绿化发展概况咸阳市所辖的13个县区均为关中42个平原绿化县。平原面积769万亩(包括平原区、台原和高原区),占全市总土地1547万亩的49.7%。其中南部8县,区划时被划为“南部平原农田防护风景环保林区”,包括115个乡(镇),面积523万亩。据林业区划资料、截止1984,平原树木保存株数4,782万株,蓄积84万 m~3,覆盖面积27万亩。其中“四旁”树3,687万株(用材树占82%,经济树占8%),林网树1,020万株(防护面积92万亩),农桐间作树75万株。平原树木总覆盖率1.7%。咸阳市平原绿化发展过程,大体经历了以下四个阶段:(一)起步阶段:建国初到六十年代,群众主要是自发植树造林没有统一规划。这时,国家主干渠路,如经惠渠、渭惠渠西兰路则由主管部门栽植管护,树木管的还比较
First, the general situation of plains greening Xianyang City under the jurisdiction of the 13 counties are Guanzhong 42 plains greening County. The plain covers an area of 7.69 million mu (including Plain, Taiyuan and Plateau), accounting for 49.7% of the total land area of 1547 mu. Among them, there are 8 counties in the south, which are zoned “Landscape Plain of Farmland Protection in the Southern Plains” during the zoning, including 115 townships (towns) with an area of 5.23 million mu. According to the data of forestry zoning, as of 1984, there were 47.82 million strains preserved in plain trees, accumulating 840,000 m 3 and covering an area of 270,000 mu. Among them, 36.77 million were “four sides” trees (82% for timber trees and 8% for economic trees), 10.2 million trees for forest net (with a protection area of 92 million mu), and 750,000 trees for Agrotis intermedius. The total coverage of plain trees is 1.7%. The greening process of Xianyang Plain has generally undergone the following four stages: (a) Initial stage: from the early days of the founding of New China to the 1960s, the masses did not have a unified plan of spontaneous afforestation. At this time, the country’s trunk roads, such as the Hui Qu and Wei-Hui Qu Zeilan Road, were in charge of the management and maintenance of trees and trees