设施栽培已成为日本实现蔬菜、花卉周年供应的重要生产体系,由于其高经济效益,故在发展地方农业中备受青昧。但设施生产是在固定的土地上进行的,为了获取高额收益,往往难以避免连作,其结果是:随着过量地投用化肥而引发土壤的盐类积聚和土传病虫害的增加等,导致了土壤的连作障害,生产上出现了不稳定,过量的硝态氮 Facility cultivation has become an important production system for the annual supply of vegetables and flowers in Japan. Because of its high economic efficiency, it has become increasingly popular in the development of local agriculture. However, the production of facilities is carried out on fixed land. In order to obtain high yields, it is often difficult to avoid continuous operations. As a result, the salt accumulation in the soil and the increase of soil-borne pests and diseases with the excessive use of fertilizers result in The continuous cropping obstacle of soil, the production appeared unstable and excessive nitrate nitrogen