温室大棚硫磺电热熏蒸技术研究

Study on sulfur fumigation technique by electronic thermal devices in greenhouse

研究测定了硫磺电热熏蒸器的使用性能、硫磺升华粒子粒径谱、升华粒子的运动沉积特性,并在温室草莓上进行了硫磺电热熏蒸技术防治草莓白粉病的田间试验。结果表明,硫磺熏蒸速率为0.31～0.79g/h,熏蒸粒子的平均粒径为1.4μm,硫磺粒子在模拟靶标正、反面的沉积密度比值平均为1.14,说明细小的硫磺粒子能够均匀地沉积在靶体表面;在温室中,硫磺粒子的有效沉积距离为8m。因此,田间使用时,熏蒸器间距设为16m为宜。田间试验说明,采用硫磺电热熏蒸技术,可以有效防治草莓白粉病,667m2增产170kg,净增产值642元。电热熏蒸技术在温室大棚等密闭条件下有很好的应用前景。

In this research,the performance of sulfurator,the spectrum and depositional characteristic of sublimate particles produced by the sulfurato r were measured.And field experimen t of controlling strawberry powdery mildew by using sulfur fumigation technique was conducted in greenhouse.The re sults showed:when the rate of sulfur fumi-gation ranged from 0.31g /h,the average size of sublimate particles was 1.4μm,the average ratio of depositional density of sulfur particles on the ob verse sides of simulated target to th at of sulfur particles on the reverse was 1.14.Results indicated that sulfur particles could be evenly deposited on the target surface.The effectively dep ositional distance of sulfur particles was 8me ters in greenhouse,so the sulfurato r should be arranged at intervals of 16me-ters in fields.Field experiments sh owed that strawberry powdery mildew effectively controlled by using sul fur fumiga-tion technique,the yield of strawberry increased 170Kg per mu.It can be c oncluded that very good results woul d be achieved after executing the tech nique in greenhouse as well as other s imilar places.