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广西林科所:广西林科所在一亩生长极差的一年生杉木幼林内,旅行了挖沟施肥的措施,沟深1米、宽0.6米,分层施放表土、杂土和牛粪2万市斤、桐1200市斤,最后在林地上铺了一层杂草以保持水土。经采用上述措施后,不但改良了土壤结构、提高了土壤肥力,而且仅改造后8个月的生长期内,高生长增加2.18米,地径增长5.72厘米,原来这样幼龄的小树已结实显出衰老现象但改造后幼林复壮起来所以从发育的阶段看也返老还童了。黑龙江林科所:
Guangxi Linke: Guangxi Linke where an acre of very poor annual growth of annual young fir plantations, travel trenching and fertilization measures, furrow 1 meter deep, 0.6 meters wide, layered topsoil, miscellaneous soil and cattle manure 20,000 Kg, Tong 1200 jin, and finally spread a layer of weeds in the woodland to maintain soil and water. The adoption of the above measures not only improved soil structure and increased soil fertility but also increased 2.18 m in height and 5.72 cm in diameter for the growth period of only 8 months after the transformation, Show aging phenomenon But after the rejuvenation of young forest so from the stage of development is also rejuvenated. Heilongjiang Forestry Branch: