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在干旱山区造林地选址中,研究了林缘地带不同造林地土壤相对含水量、空气相对湿度和苗木栽植后成活率、生长量的变化。结果表明:林缘地带土壤相对含水量和空气相对湿度由近及远逐渐降低,栽植苗木后,成活率和生长量也由近及远逐渐降低。林缘四周上缘、东缘、西缘和下缘地带2、4、6、8、10、12m处土壤相对含水量、空气相对湿度和栽植苗木后成活率、新枝长度和新枝基部粗度均以下缘地带最高,分别在46.23%~32.05%、58.42%~42.17%、90.62%~72.14%、42.42~10.04cm和17.52~8.51mm之间变动。鉴于林缘下缘地带造林后苗木成活和生长量高的优势,建议选择造林地时优先选择林缘下缘地带,并采用靠灌外移造林技术造林。
In the afforestation site of arid mountainous area, the relative soil moisture content, air relative humidity and the survival rate and growth rate of seedlings in different afforestation area were studied. The results showed that the relative soil moisture content and air relative humidity in the marginal zone decreased gradually from near to far, and the survival rate and the growth rate decreased gradually from near and far after the seedlings were planted. The relative soil moisture content, air relative humidity, seedling survival rate, new branch length and new branch root coarseness at the upper margin, the eastern edge, the western margin and the lower margin of 4, 6, 8, 10, The highest in the following margin belts, ranging from 46.23% to 32.05%, 58.42% to 42.17%, 90.62% to 72.14%, 42.42 to 10.04 cm and 17.52 to 8.51 mm, respectively. In view of the superiority of survival and growth of seedlings after afforestation in the lower margin of forest margin, it is suggested that the lower margin of forest margin should be selected when selecting afforestation land, and afforestation should be afforestation by relying on irrigation and relocation of afforestation.