论文部分内容阅读
济南市大棚秋延迟番茄的正常播期为7月下旬至8月初,这个时期育的苗子到秋后只能留两穗果,且不能很好成熟。在适宜时期内育苗越早,病毒病发病率越高。为此,我们采用SZW-16型黑色遮阳网进行了播期试验。试验分7月10日、7月20日、7月30日三期播种,以7月20日露地播种为对照。8月10～12日调查结果表明,遮阳网覆盖育苗不仅可降低小棚内的温度2～3.5℃,而且番茄病毒病的发病率也大大降低,7月20日播种盖网的发病率只有4%,而没盖网的对照发病率达90%。同时试验还看出,采用遮阳
Autumn delayed shed in Jinan City, the normal tomato to sowing for late July to early August, this period of nurturing seedlings to leave only two spike, and can not mature well. In the appropriate period of nursery earlier, the higher the incidence of viral diseases. To this end, we use SZW-16 black shading network for the sowing date. Test points July 10, July 20, July 30, three seeding, open seeding July 20 as a control. August 10 ~ 12 survey results show that shade net cover nursery can not only reduce the temperature inside the shed 2 ~ 3.5 ℃, but also the incidence of tomato virus disease is greatly reduced, July 20 sow coverage of the coverage rate of only 4 %, While the control without covering the network incidence of 90%. At the same time test also shows that the use of shade