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平旺苗圃是培育落叶松苗木的主要基地,苗圃面积300多亩。圃地条件:海拔1050米,土壤为淡栗钙土,PH 值7.5—7.75,地下水位18米。年降雨量400毫米以下。早霜9月25日,晚霜5月中旬,年平均气温7℃以下,极端最高气温37.7℃,极端最低气温-27.6℃。由于气候干燥,风大风多,土地瘠薄,对育苗很不利,尤其培养落叶松苗困难更多。历年来我圃为了争取苗木生长期,春季落叶松育苗的习惯播种期在5月初至月底。1980年春因育苗面积大,劳力少,不能在习惯播种期内完成预定任务,为此,适当延长了播种期,结果85亩不同播种期的落叶松苗,平均亩产20万株,取得了较好的成
Ping Wang nursery is the main base for cultivating larch seedlings, nursery area of 300 mu. Garden conditions: 1050 meters above sea level, the soil is light chestnut soil, PH value 7.5-7.75, groundwater level 18 meters. Annual rainfall below 400 mm. Early frost September 25, late frost in mid-May, the annual average temperature below 7 ℃, extreme maximum temperature 37.7 ℃, extreme minimum temperature -27.6 ℃. Due to the dry climate, strong windy winds and barren land, it is very unfavorable for raising nurseries. In particular, it is more difficult to cultivate larch seedlings. Over the years I nursery in order to fight for the growth of seedlings, the spring sowing larch sowing habits in early May to the end of May. In the spring of 1980, due to the large seedling area and less labor, it was unable to complete the scheduled task within the normal sowing period. Therefore, the sowing period was extended as appropriate. Results The larch seedlings of 85 mu of different sowing dates had an average yield of 200,000 per mu and achieved better results Into