兴安落叶松塑料薄膜覆盖育苗试验初报

Seedling technique covering with plastic film to Lalix gmelini

我国北方高寒地区,为缩短兴安落叶松育苗期。可采用塑料薄膜覆盖育苗技术。覆盖方式采用拱架方式,覆盖高度为30cm。经营管理上要适时早播,其标准是早春扣膜后,当土壤5 cm深处地温稳定在10℃时播种;塑料薄膜管理方面是上午8:00揭开,下午4:00-6:00盖好薄膜,白大8:00-16:00正常浇水,做好水分和温度调节工作。育苗密度为400-500株/m2为宜。

To reduce seeding time of larix gemelini, a covering technique was adopted in high and cold areas of northern China.The seedlings were arched which made by plastic film (high at 30 cm) in field trials. Following measures were applied in the management: Beginning sowing at an opportune time early , which should be after film cover in early spring and while ground temperature achieve 10℃ in 5 cm; Generally, uncovering time would be at Am8:00 and water normally before recovering at Pm4:00- 6:00. It revealed that optimal seedling density were 400-500 trees·m-2.