日光节能温室一品红品种筛选和周年生产技术研究

Poinsettia Lines Selection and Technology for All Year Round Production in Energy Saving Greenhouse

在节能温室进行周年生产栽培试验,先后引进矮生一品红11个品种,通过观察品种的生长特性、商品性、适应性,从中筛选出适合本地节能温室生产的优良品种5个。结果表明:早生天鹅绒的苞片对光照要求最低为400 lx,天鹅绒最高为41 000 lx;生长期最佳栽培基质为泥炭:珍珠岩=3:1;营养生长至短日处理前一周施用氮:磷:钾为20:10:20,从短日处理前一周改用氮:磷:钾为15:20:25;在夏季使用简易风机水帘及单层遮阳网可使温室环境温度降低4℃左右。

12 new poinsettia varieties were introduced in energy saving greenhouse. We observed the characteristics in growing, market and adaptability of these Poinsettia. 5 good lines fitting to local areas were selected. The experiment about all year round production was studied. The result indicated that the lowest light compensation point of the Red velveteen＇ s bract was 400 lx , the highest light component point of Red velvet＇ s bract was 41 000 lx ; the optimum culture matrix was white peat ： perlite =3 ： 1 in growing period; nitrogen： phosphor： potassium =20 ： 10 ： 20 was used from vegetative growth period to short day treatment a week ago, nitrogen： phosphor： potassium = 15 ： 20 ： 25 was used short day treatment a week ago; the simple - easy fan ,water curtain and monolayer sunshade net were used in summer, which could lower the temperature of environment in energy saving greenhouse about 4 ℃.