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紫椴(Tilia amurensis Rupr.)的播种育苗,单位面积产茁量将直接影响苗木的质量和育苗成本,如选择适宜的留苗密度很有经济价值。我们于1983—1985年在新宾县林科所试验圃地进行了留苗密度的试验。试验圃地年均气温4.7℃、年均降雨量800mm,无霜期125天,晚霜5月上旬,早霜9月下旬,解冻4月末、结冻10月上旬、圃地平坦,背风向阳,排水良好,为沙质壤土,土层深厚,土质肥沃,5cm土层含全N0.127％,全P0.21％,速效N10.47mg/100g±,速效P6.54mg/100g±,速效钾14.9mg/100g±,有机质2.07％,PH6.38,
Tilia amurensis (Rupr.) Sowing seedlings, the yield per unit area will directly affect the quality of nursery stock and nursery costs, such as the choice of appropriate density of Rare Seedling has great economic value. In 1983-1985, we conducted a test of the seedling density at the Linke Experimental Site in Xinbin County. The annual average temperature of the experimental farmland is 4.7 ℃, the average annual rainfall is 800mm, the frost-free period is 125 days, the late frost is in early May, the early frost is late September and thawed at the end of April and the frost is frozen in early October. Sandy loam, deep soil, fertile soil, soil containing 5% N0.127%, P0.21%, available N10.47mg / 100g ±, P6.54mg / 100g ±, potassium 14.9mg / 100g ± , Organic matter 2.07%, PH6.38,