茶树短穗扦插2夹1膜覆盖保温技术研究

目的]研究茶树短穗扦插2夹1膜覆盖保温技术。方法]在原有双层覆盖的基础上,加盖1层塑料薄膜,形成2层塑料薄膜中间1层遮阳网——2夹1膜的覆盖保温方式。结果]越冬期间,2夹1膜覆盖日最低温度平均值为2.32℃,高于无膜覆盖2.29℃,高于双膜覆盖1.79℃;区试期间,极端最低温度无膜覆盖为-11.51℃,双膜覆盖为-9.47℃,2夹1膜覆盖为-6.47℃;2夹1膜覆盖日平均温度为10.30℃,高于无膜覆盖4.93℃,高于双膜覆盖1.78℃;2夹1膜日最高温度平均值为28.12℃,高于双膜覆盖4.30℃,高于无膜覆盖14.30℃;采用2夹1膜覆盖技术,育苗成活率比双膜覆盖高4.48百分点,增值12 750元/hm2。结论]2夹1膜具有很好的保温、增温能力;可消除越冬时的冻土抬苗现象,提高育苗的安全系数。

Research on Insulating Technology of Short Cutting of Tea Plant Using Three-ply Film

Objective]To study the insulating technology of short cutting of tea plant using three-ply film.Method] On the basis of bilayer, bilayer film with one layer shading film inside was invented. Result] During the overwintering period,the daily minimum temperature using three-ply film was 2.32 ℃,2.29℃ higher than none-film, 1.79 higher than bilayer film.During the period of experiment, the daily minimum temperature using none-film cover was -11.51 ℃,bilayer film was -9.47 ℃, three-ply film was -6.47 ℃. The mean value of daily tem-perature using three-ply film was 10.30 ℃, 4.93 ℃ higher than none-film, 1.78 ℃ higher than bilayer film.The mean value of daily maxi-mum temperature of three-ply film was 28.12 ℃, 14.30 ℃ higher than none-film cover, 4.30 ℃ higher than bilayer film.The survival rate of seedling using three-ply film was 4.48 percent points higher than bilayer film, and the average increment can mount to 12750 yuan/hm2 . Conclusion] Preserving heat and keeping warm were better by three-ply film.The safety factor of seedling was enhanced relied on the new in-vention which eliminated the phenomena of freezing damage.