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近几年栽树挖穴似乎越挖规格越大,有的地方进而挖大沟,一搞就是几十亩、几百亩,蔚为壮观,但其实际效益如何?笔者于1983年12月初做了不同规格植树穴的造林试验,通过两年的观察,结论是否定的。 试验地设在冠县水利局苗圃内,面积11亩,土地为沙质壤土,栽植2年生沙兰杨大苗,4个重复,错位排列,栽植穴的规格有
In recent years, planting trees digging holes seem to dig the larger the size, and then dig some ditches in some places, one out is dozens of acres, a few hundred acres, spectacular, but the actual benefits? Author in early December 1983 to do Different specifications tree planting hole afforestation test, after two years of observation, the conclusion is negative. Experimental ground located in the Guan County Water Conservancy Bureau nursery, an area of 11 acres of land for sandy loam, planting 2-year-old Salvia miltiorrhiza seedlings, 4 repeat, dislocation, planting hole specifications