The Effect Of Delay On Salinization Of Facility Soil By Fully Wettish And Flooding Cultivation

With the development of facilities vegetable scale, specialization and intensive, soil salinization caused by facilities continuous cropping obstacle which has become increasingly prominent, seriously affect the yield and quality of vegetables. Facilities upland-rotation has a significant effect on governing soil salinization, it is difficult to carry out flooding cultivation in a number of facilities vegetable base due to the limitation of soil properties, water resources and other conditions, therefore, to explore the delay effects of fully wettish cultivation on facilities soil salinization, it is expected to carry out research on new models and new technologies of more extensive facilities vegetable upland-rotation which can control continuous cropping obstacle.In this study, we used the plastic buckets cultivation way to detailedly explore the fully wettish cultivation and flooding cultivation on delay effects of facilities soil salinization by following these steps:firstly, we took the fully wettish-cultivation and flooding cultivation comparing with conventional planting of drought from July to September in 2013; and then pokchois were planted in all experimental field after stopping the supply of water from December 2013 to February 2014. The difference between soil properties around the stubble of pokchois were compared. What’s more and we also measured the difference of yield and quality of pokchois. The results showed that no significant difference about yield, nitrate, and N, P, K content of pokchois after two water treatments. Around the stubble of pokchois, the soil EC value, NO3- content was significantly lower than the continuous drought planting, the EC value in 10-40 cm soil layer of fully wettish and flooding cultivation treatment declined,0-10 cm soil layer increased and the rate of increase were 83.66%,48.88%, respectively. While the continuous increase of conventional planting of drought was 105.76%. The soil NO3- content were increase in 0-10 cm,30-40cm layer of fully wettish cultivation and all layers of flooding cultivation. the rate of increase of 0-10 cm in fully wettish cultivation, flooding cultivation and conventional planting of drought were 27.70%、42.95% and 98.83%, respectively, which instructed for handling of two water salinization with a better delaying action, fully wettish and flooding cultivation has their own advantages.Basing on one cycle of water and drought cropping system, we carried out water spinach as materials from March to September 2014 to set two treatments of fully wettish cultivation and flooding cultivation, the conventional planting of drought as a control, three cultivation methods were provided intra-groups blank control. After the end of water spinach, stopping the supply of water, we continued planting pokchoi in drought soil from September to December 2014, completion of the second round water and drought cropping system. The difference between soil properties around the stubble of pokchois were compared. What’s more and we also measured the difference of yield and quality of Pokchois. The results showed that flooding cultivation ipomoea yield was significantly higher than fully wettish cultivation and both were significantly higher than that of conventional planting of drought; the NO3- content was significantly lower than conventional planting of drought, however there were no significant difference between fully wettish and flooding cultivation. The N content of water spinach expressed that flooding cultivation lowest, followed by the fully wettish cultivation; the P, K content were opposite. Soil EC values, NO3- levels were lower than control in different cultivation ways, fully wettish cultivation higher than the corresponding flooding cultivation, both water ways are lower than for conventional planting of drought. Different cultivation ways each layer’s soil available phosphorus and potassium contents were decreased, and the fully wettish cultivation fell less than flooding cultivation. In conventional planting of drought the 0-20 cm soil invertase activity was lower than control, while fully wettish cultivation each blank control invertase activity were similar. We can summarize that it was better to delay effects of greenhouse soil salinization by planting aquatic vegetables than simply pureing water, and fully wettish cultivation of aquatic vegetables not only allows topsoil salt infiltration, but also to avoid excessive loss of soil nutrients.Basing on two cycle of water and drought cropping system, we carried out cress as materials from December 2014 to February 2015, to set two treatments of fully wettish cultivation and flooding cultivation, the conventional planting of drought of pokchois as a control. the differences of three round soil properties and cress yield and quality were analyzed. The results showed that:there were no significant difference in cress on height, stem, diameter, yield and nitrate of two water cultivation ways. The content of N in cress were significantly higher on wettish-cultivated cress than flooding treatment, and the K were significantly lower than flooding treatment, the P were no significant, fully wettish cultivation and flooding cultivation could be further reduced soil EC value, NO3- content and available phosphorus and available potassium content, and 0-10 cm soil layer decreased greatly, fully wettish cultivation range of fell lower than flooding treatment. Soil invertase activity, urease activity of two water treatment has decreased in varying degrees, and fully wettish cultivation was relatively slow decline. The 0-10 cm soil layer of flooding cultivation acid phosphatase was increased,10-40 cm soil layer was decreased, while fully wettish cultivation was increased in each soil layer by different degrees. We can summarize that fully wet planting cress not only reduced soil salinity with retaining more available nutrients, but also good to keep the soil enzyme activity.