Zhang Shifan;Zhang Shujiang;Li Fei;et al.
. 2008, 1(2): 28-31.
This experiment adopts design for cracked section,sets up different treatments on small sheds and seedling ages,conducts data analysis on in-room temperature,soil temperature and humidity,etc.climatic factors,and compares the influences exerted by different sheds on growth,yield,tolerance to immature bolting of spring Chinese cabbage.The results indicates that plastic shed has remarkable effect in raising its inner day air temperature,but no distinct effect in maintaining its inner night air temperature.Compared with single layer plastic shed，double-layer one has better effect in maintaining its inner air humidity,but in respect of raising or maintaining air temperature,its effect is not distinct.Compared with no water-sack one,the double-layer plastic shed with black sack full of water can promote the day air temperature rising and slow the night air temperature decreasing.Plastic shed has significant effects in promoting the growth of spring Chinese cabbage and increasing its yield.Besides it can also inhibit the extension of main flower stalk in heads.In this experiment,the growth,yield and tolerance to immature bolting of spring Chinese cabbage under the treatment with single-layer shed without water sack are relatively better than the other treatments.
