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在1975——1978年,为了减少病虫害对针叶苗木的危害,确定了施肥措施。根据不同因素,按当地培育苗木的技术要求,我们进行了4次重复28种不同形式的施肥试验。试验是在契金省契金林业局苗圃地进行的。苗圃的土壤是中等厚度的未灰化森林草地砂壤土。腐殖质含量(30厘米深处)不大于2％,土壤内可吸收的营养物质含量(每百克土壤含毫克数)是:氦—骶(No_3—4.6),磷和钾—中等。(P_2O_5—10.4,K_2O—13.1)往进行试验的休闲地里施入泥炭—无机堆肥80吨/公顷。播种前,土壤接近中性,PH>5.7,播种前,种子在
In 1975 - 1978, in order to reduce the harm of pests to coniferous seedlings, fertilization measures were determined. According to different factors, according to the technical requirements of local nursery stock, we conducted 4 times to repeat 28 different forms of fertilization test. The experiment was carried out in the nursery of the Forestry Department of Qi Jin Province. The nursery soil is medium-thick, unhushed forest grassy sandy loam. The humus content (30 cm depth) is not more than 2%. The amount of soil nutrient that can be absorbed (milligrams per 100 grams of soil) is: helium-sacral (No_3-4.6), phosphorus and potassium-medium. (P_2O_5-10.4, K_2O-13.1) peat-inorganic composting 80 tons / ha was applied to the fallow land under test. Prior to sowing, the soil is near neutral with a pH> 5.7 and seeds are planted before sowing