榆林沙区樟子松育苗技术

樟子松是耐寒、抗旱的优良针叶树种,在榆林沙区的自然条件下造林用苗一般需3～5年出圃。育苗地应选择土质疏松、排水良好,地下水位较低,呈中性或微酸性圃地。营养土采用黄绵新土1方混拌优质磷肥3～5kg,硫酸亚铁2kg左右配制;种子处理可用雪藏、沙藏或温水浸种;播种深度不能大于0.5cm;出苗后重点防治立枯病;注意越冬保护等。

Preliminary Exploration of Seedling Production of Pinus sylvestris var.mongolica in Yulin

Pinus sylvestris var.mongolica,cold resistant and drought-tolerant coniferous tree,is used in Yulin for afforestation by three or five year seedlings.Soil for seedling production should be loose and well drained with low level of underground water.Nutritional soil consists of yellow loessal soil mixed with 3~5 kg of phosphorus and 2 kg of ferrous sulfate.Seeds were treated by snow storage,sand or soaking in warm water.The depth of sowing was 0.5 cm.