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过去基地造林,有的由于林地选择不当,整地粗放或抚育失时,形成了“小老头”林。主要表现是:平顶、弯曲、萌条丛生、生长特别缓慢,没有发展前途,应该通过改变环境条件,加以改造。近几年来,我省各地群众,大搞“小老头林”改造试验,创造了许多经验。他们根据“小老头林”各种形成的原因,分别采取下列几项不同措施,进行改造,都取得显著的效果。1.刨土深翻:由于整地粗放,抚育失时,形成的“小老头林”,应清除杂草,深翻土壤,挖掉多年盘结的草根,改造旧根系,复壮树势。如五台山、半林、桃源等林场,进行刨土深翻,即连草带土深翻26厘米,刨成土块,不碎土草根朝上,杂草落叶翻入土中,提高土壤肥力,增加蓄水保温效能。“小老头林”
The past base afforestation, and some due to improper selection of woodland, land preparation extensive or tending to lose time, formed a “small old man” forest. The main performance is: flat top, curved, sprouting, growth is particularly slow, there is no future development, we should change the environmental conditions, to be transformed. In recent years, the masses in all parts of our province have vigorously engaged in the experiment of reforming the “old man” and have created many experiences. According to the various reasons for the formation of “old man Lin”, they took the following several different measures to carry out the reformation and achieved remarkable results. 1. Deep digging of soil: due to extensive land preparation, tending to lose time, the formation of “old man forest” should be cleared of weeds, deep plowing the soil, digging off years of grass roots, transformation of the old root system, rejuvenation. Such as Mount Wutai, Habitat, Taoyuan and other forest farms, deep plowing dig deep plowing, that even the grass soil 26 cm deep turning, planed into clods, not broken grass roots upside down, weeds fallen into the soil, increase soil fertility and increase Water storage and thermal efficiency. “Old man forest”