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近年来,连作障碍问题引起了人们极大关注,已成为重要研究课题。所谓连作障碍,即在同一地块,连年栽培同种作物引起的不利于作物生长的各种障碍,造成减产或产量波动。这一问题在蔬菜生产上特别是设施栽培蔬菜更为重要。引起连作障碍的主要原因一般有土壤恶化作物分泌有害物质土壤传染性病虫害(微生物)等。最近农林省对各种原因所占比例进行了一次全国性调查,结果病害占71％,虫害占
In recent years, continuous obstacle problem has aroused great concern and has become an important research topic. The so-called continuous cropping obstacles, that is, in the same land, year after year to cultivate the same crop caused by various obstacles to crop growth, resulting in reduced production or output fluctuations. This issue is more important in the production of vegetables, especially in the cultivation of vegetables. The main causes of continuous cropping obstacles are the soil deterioration crop secretion of harmful substances soil-borne diseases and pests (microbes). Recently, the Ministry of Agriculture and Forestry conducted a nationwide survey on the proportions of various causes, resulting in 71% of the diseases, with pests accounting for