| Zhaozhou County located in the southwestern of Heilongjiang Province,where is the one of main distribution areas of the province’s key drought and saline soil, soil salinization and secondary salinization phenomenon is getting worse. The impedient factors of saline soil include land barren, productivity low and low vegetation coverage, et al. These factors serious threat to our country’s total arable land and food security. For the soil salinization impedient factors of Zhaozhou County, by way of field experiment that was conducted Zhaozhou County dryland salinity soil improvement research trials. The experiment set five treatments, respectively are farmers’conventional fertilization, soil testing and formulated fertilization, plastic film mulching, salinization dryland special fertilizer, drip irrigation+liquid fertilizer, aims to improve the physical and chemical properties of soil salinization, increase biological activity, yield of corns and economic benefit growth to achieve improve the Saline Soil fertility, land productivity, and reduce the harm of salinization, through a comprehensive analysis, screening a suiTab. salinization dryland soil farming techniques improved model in Zhaozhou County that economic, efficient and easy to promote, at the same time, it can provide a theoretical basis for the sustainable development and the efficient utilizationof agriculture.The results of experiment were as follows:1.Soil physical properties have been significantly improved:before corn jointing stage of corns, plastic film mulching, drip irrigation+liquid fertilizer treatment can significantly increase soil temperature; in corn the growing period, plastic film mulching, drip irrigation+liquid fertilizer treatment can effectively increase soil0-20cm soil moisture. plastic film mulching, drip irrigation+liquid fertilizer treatment can effectively reduce soil bulk density, while drip irrigation+liquid fertilizer treatment can significantly increase the total porosity of the soil, increase soil field capacity.2.Soil chemical properties have been significantly improved:plastic film mulching, dri p irrigation+liquid fertilizer, salinization dryland special fertilizer treatment can significa ntly reduce soil pH, conductivity, water solubility the content of Na+, Mg2+, CO32-, HCO3-improve soil water solubility the content of K+, Ca2+,available nitrogen, phosphorus and potassium content, increase soil cation exchange capacity and reduce soil basicity, where dr ip irrigation+liquid fertilizer treatment is the best effect.3.Soil enzyme activities improved significantly:plastic film mulching, drip irrigation+liquid fertilizer treatment can significantly improve soil catalase、urease and Alkaline phosphatase activity, drip irrigation+liquid fertilizer treatment processing activity increased most significantly.4.Significantly increased corn production:compared with conventional tillage, grain weight and yield of each treatment have significant growth, specially drip irrigation+liquid fertilizer treatment processing yield is the most obvious effect.5.Establishing Zhaozhou County salinization dryland patterns improved agricultural efficiency technologies:Through a comprehensive analysis of the indicators, establish drip irrigation+liquid fertilizer treatment is the agricultural technologies and efficient mode of Zhaozhou County salinization dryland soil improvement. |
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