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园土消毒大棚蔬菜由于连作次数多,一般病害较为严重。用化学药剂进行园土消毒,可以杀灭靠土壤传播病害的病菌,降低发病率。可在每平方米土中注入3-5克多菌灵或300克溴化甲醇灭菌。双层保温采用双层保温措施,即在大棚内加盖地膜或设置小拱棚,可收到良好效果。据试验,在大棚内加盖地膜,能使地温增高2℃;在大棚内设置小拱棚,可使小拱棚内的温度保持在15℃以上。改用无滴膜采用聚氯乙稀无滴膜,大棚内的水汽便不会在棚膜上凝聚成小滴,对棚内的蔬菜构不成遮光影响,透光率可保持在90%左右。采用滴灌技术采用膜下滴灌技术,棚内空气的相对温度降低10%以上,混合病情指数降低,可使黄瓜增产10%。
Garden soil disinfection greenhouse vegetables because of the number of continuous operation, the general disease is more serious. Garden chemicals with chemical disinfection, you can kill bacteria by soil-borne diseases and reduce the incidence. 3-5 grams per square meter of soil can be injected carbendazim or 300 grams of brominated methanol sterilization. Double-layer insulation using double insulation measures, that is, affixed to the plastic film in the shed or set a small shed, can receive good results. According to the experiment, in the greenhouse affixed film, can make the temperature increased by 2 ℃; set in the shed small arch, the arch can be kept within the temperature above 15 ℃. Use non-drip film with PVC drip film, the water vapor inside the greenhouse will not condense into droplets on the greenhouse film, the shed can not constitute the shade of vegetables, light transmittance can be maintained at about 90%. Drip irrigation technology using drip irrigation technology, the shed air relative humidity decreased by more than 10%, mixed disease index decreased, the cucumber yield 10%.