Effect Of Bio-fumigation On Yield Of Continuous Cucumber In Greenhouse And Contents Of Soil Nurients

Continuous cropping obstacles of soil had increasingly become an important factor in restrictingsustainable vegetable production in facility vegetable cultivation. Due to the salt content of continuouscropping soil increased with the extension of cultivation years, and gradually to the surface, causing surfacesoil harden and worsen the soil physical and chemical properties, higher pH, which seriously affected theabsorption of nutrients of the crops. Cucumber was one of the main varieties of facility vegetable cultivationin north China, also one of the problems of continuous cropping vegetable varieties. Based on the above, theeffects of yield of facilities for continuous cropping cucumber and the soil nutrients contens were studiedthrough choosing better fumigation effect of mustard as biofumigation materials mixed with soil in differentfumigation treatments by adopting micro zone field test method. The purpose was to formulate reasonablecultivation system to mitigate or overcome continuous cropping crops growth obstacle and provide atheoretical basis to the development of facilities vegetables for achieving sustainable production. The resultswere as follows:1. The different biofumigation treatments all improved the yield of cucumber, especially the treatment ofHSMM, which had significant differences with CK and was higher23.6%than CK. Simultaneouslybiofumigation significantly increased the content of soluble sugar and soluble protein of cucumber, alsoimproved the nutritional quality of cucumber in some extent. In addition cucumber stems were relativelythick in the treatment of HSMM and had significant differences with other treatments, as well as leaf area.2. There was a good role to improve soil pH and conductivity by adding mustard of Brassica plantmaterial of good biofumigation capacity. The soil nitrate content showed a decreasing trend with the growthof cucumber, which showed that, there were no significant differences before fumigation, and a down trendafter different fumigation treatments, PE treatment was significantly lower than other treatments, MItreatment had the highest content. Organic matter content increased first and then decreased in the wholegrowth period of cucumber, but the content of soil available potassium was significantly lower than CK in thetreatment of biofumigation. Overall, it was more conducive to the maintenance of soil fertility in the treatmentof HSMM, which could significantly improve the soil available K, but the content of soil total nitrogen,available nitrogen, total phosphorus, available phosphorus were significantly lower.3. Compared with CK, there were higher nutrient contents in every part of cucumber plants in fruitperiod under biofumigation. Leaves were the most parts of phosphorus and potassium accumulation, LSMMand HSMM were the treatments of most amount of nitrogen accumulation in the treatment of differentbiofumigation.,, especially the treatment of HSMM. The content of N,P,K was higher than CK by1.4times, 0.6times,1.2times in the roots; by1.2times,0.7times,0.5times in the stems; by0.6times,1.7times,1.5times in the leaves; by1.1times,1.4times,0.9times in the flowers in the treatment of HSMM.In conclusion, biofumigation could improve the ecological environment of soil, promote the nutrientabsorption of continuous cropping cucumber, and enhance the yield of cucumber, which had a certainregulatory role to overcome cucumber continuous cropping obstacles.