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意大利波河平原营造杨树高产林,用机械挖掘直径1米的大坑植树。我省文山、红河杉木林区,最简单的栽树是“一锄法”——当地称为“牛喳嘴”,实际上植树坑变成了土壤中切开的一条缝。两种植树坑大小差异如此之巨,不禁令人发问:植树坑,究竟大好,还是小好? 施卫东在山东林业科技上发表文章,提出“近几年栽树挖穴,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。试验的结果表明,超大穴植树是不适宜的,如在大范围内推广此法,其浪费将是很惊人的。”
Poplar plain in Italy to create high-yield poplar, excavation of machinery with a diameter of 1 m pit planting. My Wenshan, Honghe fir forest, the simplest tree planting is “a hoe method” - locally known as “cattle mouth”, in fact, the tree pit into a slit in the soil. Two kinds of tree planting pit size difference is so huge, can not help but ask: tree planting pit, what good, or small? Shi Weidong published an article in Shandong forestry science and technology, proposed "digging trees in recent years, dig the more digging specifications, In some places and then dug ditch, one out is dozens of acres, a few hundred acres, spectacular, but the actual benefits how? I made in December 1983 different specifications afforestation experiments, through two years of observation , The conclusion is negative.Experimental results show that the super large hole planting is not suitable, such as promoting this method in a wide range, the waste will be very alarming.