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为了增加林木生长量,我们继1984年对1965年栽植的人工长白落叶松施肥试验后,1985年又在其它类型土壤上做了相类似的施肥试验。现将有关情况报告如下。一、试验区的自然情况试验地设在临江林业局芒河林场。土壤为玄武岩台地白浆土,海拔850m,北坡5度年平均温度2.8℃,无霜期110天左右,是1965年栽植的长白落叶松,林木疏密基本均匀,保留密度每公顷为1000株左右,平均胸径为12.2cm。
In order to increase the growth of forest trees, we carried out a similar fertilization experiment on other types of soils in 1985, following the fertilization experiment of artificial white larch planted in 1965 in 1984. The relevant information is as follows. First, the natural conditions of the pilot area Experimental site located in the Mangrove Forest Farm Linjiang. The soil is basal white soil of 850m above sea level, the annual average temperature of 5 degrees north slope is 2.8 ℃ and the frost-free period is about 110 days. It is a long white larch planted in 1965. The density of trees and trees is basically uniform and the reserve density is about 1000 plants per hectare. The average diameter at breast height is 12.2cm.