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一、试验地概况试验地设在吉林省白河林业局春雷林场苗圃地。土壤下层为黄粘土,有机质含量为6.91～7.16%,全氮0.51%,全磷0.153%,全钾2.45%,有效氮为0.0045%,有效磷为0.0037%,有效钾为0.025%,PH6.5,年平均气温22℃,年平均雨量680毫米,无霜期113天。二、试验材料与方法1、试验材料,树种为长白落叶松(Larixolgensis Helly f·olgensis),种子产于白河林业局。千粒重3.943克,发芽势39.9%,发芽率65.3%。肥料为硝酸铵
First, the experimental site The experimental site is located in Spring Forest Farm, Baihe Forestry Bureau, Jilin Province. The lower layer of soil is yellow clay with organic matter content of 6.91-7.16%, total nitrogen of 0.51%, total phosphorus of 0.153%, total potassium of 2.45%, available nitrogen of 0.0045%, available phosphorus of 0.0037%, available potassium of 0.025% and pH of 6.5 , The average annual temperature of 22 ℃, the average annual rainfall of 680 mm, 113 days frost-free period. Second, the test materials and methods 1, the test material, the species is Larix olgensis (Larixolgensis Helly f olgensis), the seeds produced in the Baihe Forestry Bureau. Thousand grain weight 3.943 grams, germination potential 39.9%, germination rate 65.3%. Fertilizer is ammonium nitrate