近年来,经在设施栽培方面,随着园地固定化,出现了严重的连作障碍,主要原因之一是土壤病害,防治十分困难。如果在栽植作物之前对土壤进行消毒,降低病原菌密度,是行之有效的措施。过去,土壤消毒是利用气体剂和熏蒸法等进行的。最近出现了以塑料大棚设施为中心的“利用太阳热土壤消毒法”,也有部分露地处理试验正在开展中。处理概要利用太阳热土壤消毒法,在日本最初是奈良县农业试验场以塑料大棚设施栽培为对象开发的。就是在栽种前的盛夏期1个月之内将温室内的地表用透明乙烯薄膜(或聚氯乙烯薄膜)覆盖,然后将大棚密闭,地温随之升高,从而达到消毒的效果。该方法开发试验时,在棚内撒了稻草和石灰氮,并进行了耕耘。把地块分成小垄后,用薄膜进行覆盖,同时往畦间灌 In recent years, as a result of facilities cultivation, with the immobilization of the garden, serious obstacle of continuous cropping up has emerged. One of the main reasons is soil diseases, and prevention and control are very difficult. If the soil before planting crops disinfection to reduce the density of pathogenic bacteria, is an effective measure. In the past, soil disinfection was carried out using gas agents and fumigation methods. Recently there have been plastic greenhouse facilities as the center of the “use of hot sun soil disinfection Act,” there are some open-field treatment trials are under way. Outline of treatment The solar hot soil disinfection method was first developed in Japan for cultivation of plastic greenhouse facilities in Nara Prefecture Agricultural Experimental Field. That is, within one month before the planted midsummer, the surface of the greenhouse is covered with a transparent vinyl film (or polyvinyl chloride film), and then the greenhouse is sealed and the ground temperature is raised accordingly to achieve the disinfection effect. When the method was developed and tested, straw and lime nitrogen were sprinkled in the shed and cultivated. After dividing the parcel into small ridges, cover it with a thin film and pour it into the shoal