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汾西县属晋西北黄土高原的残垣沟壑区,总面积131万亩,现有宜林荒山55万亩。境内沟壑纵横,支离破碎,水源奇缺,十年九旱。年均降水量550毫米。素有“上了汾西垣,吃水比油难,公路绕梁转,少见树和村”之说。水土流失严重,每年流入黄河的泥沙180万吨。为了改变这种生态现状,加快三北防护林体系建设,1982年以来,汾西县试验用腐殖酸钠溶液(以下简称腐钠)刺激多年生油松大苗生长,使栽植保存率由过去的50%左右提高到81%。从1982年4月,在县小圪塔重点工程林区道路,对7年生油松大苗进行腐钠喷洒和灌根试验。具体作法:用常规植树法移植油松大苗4000株。栽植后,其中3700株采用腐钠灌根和喷洒处理,在栽植穴土壤中浇灌
Fenxi County is a ruin and gully area in the northwestern Shanxi Loess Plateau, with a total area of 131 mu and an existing afforestation area of 55 mu. Vertical and horizontal territory ravines, fragmented, water scarce, ten nine drought. The average annual rainfall of 550 mm. Known as “on the Fenxi Yuan, draft than oil, highway around beam, rare tree and village” said. Severe soil erosion, the annual inflow of sediment into the Yellow River 1.8 million tons. In order to change this ecological status quo and speed up the construction of the Three North Shelterbelt system, since 1982, Fenxi County experiment with sodium humate solution (hereinafter referred to as rotten sodium) to stimulate the growth of perennial pine seedlings so that the planting preservation rate from the past 50% So up to 81%. From April 1982, on the road in the key project of Xiaolong Pagoda in the county, the 7-year-old Pinus tabulaeformis seedlings were sprayed with sodium and the irrigation experiments were conducted. Specific practices: Transplanting 4000 trees of pine seedlings by conventional planting method. After planting, of which 3700 plants were treated with sodium decay and spraying, watering in the planting hole soil