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甘河林业公司种子园苗圃,是1958年建立的老苗圃。现有圃地面积163亩,其中育苗作业面积84亩。目前,播种、起苗、浇灌等作业实现了半机械化,每年生产苗木250万株。进入七十年代,苗圃的产苗量曾逐年下降。到1978年,一年生兴安落叶松每亩仅产5万株,而且幼苗发育不良,病虫害严重。经过调查分析,产生这些问题主要是因为:①圃地土层较薄(平均25厘米),管理粗放,建圃以来从来进行过休闲和轮作。②长期耕作,土壤肥力减退。经测定每亩地含氮肥仅3公斤,钾肥19公斤,磷肥几乎没有,苗木所需营养元素得不到满足。③连年使用化肥,引起
Gan River Forestry Seed Company nursery, is established in 1958 the old nursery. The existing nursery area of 163 mu, of which nursery operations area of 84 mu. At present, semi-mechanization has been achieved in such fields as sowing, starting seedling and watering, and the annual output of 2.5 million seedlings. Into the seventies, nursery production and quantity has declined year by year. By 1978, Larch per annum annual production of only 50,000 per acre, and seedling malnutrition, pests and diseases. After investigation and analysis, these problems are mainly caused by: ① The soil layer in the garden is relatively thin (an average of 25 cm) with extensive management. Leisure and rotation have always taken place since the establishment of the garden. ② long-term farming, soil fertility decline. The measured nitrogen per mu of land only 3 kg of nitrogen, potassium 19 kg, almost no phosphate, seedlings required nutrients not met. ③ year after year of using fertilizer, cause