Micro-organisms Fertilizer And Its Effectiveness Evaluation Improvement Saline-alkali Soil In Daqing

To improve the environment of Saline Alkali land,the current engineering measures are often used with chemical fertilizers to improve soil physical and chemical properties of Saline Alkali land and planting trees to meet the comprehensive management of Saline Alkali land. According to the present study shows that, in the process of useing of chemical fertilizers, the measures may produce significant effects in the short term. But because of chemical fertilizers which lack the fat, fail fast and the fertility of poor long-term, at the same time, the already very fragile ecological environment of Saline Alkali land being polluted for secondary chemical contamination of the soil, the measures have lots of weak points. Recently researchers have proposed to replace the traditional chemical fertilizers with useing of microbial fertilizers, found that has many characteristics, such as environmentally friendly and long-term release.In this study of microbial fertilizers to replace traditional chemical fertilizers,use of field experiment, set the fertilizer experiment group and control group without fertilizer. In this experiment, plant 1000 plants of three-year Populus xiaohei and 1440 plants of three-year Syringa oblata in each land. In the three planting years, observe the survival rate and preserve rate, and in the period from May to October in 2007, collect the test area soil samples. Using the samples,test six index, such as the soil water content, organic matter content, pH, hydrolysis of nitrogen and so on. At the same time, collect samples of plant leaves measured MDA,Proline content, to measure the resistance of plants in salt stress changes.The following conclusions:(1) Application of microbial fertilizers in Saline Alkali land can effectively improve the survival rate and preserve rate of the plants. Compared with the control group, the fertilizer group can effectively improve the survival rate of 62.35% of tress once planted, and enhance the preservation of trees for three years to reach 63.1%,61%,75%.(2) Application of microbial fertilizers in Saline Alkali land can effectively improve the experimental soil moisture and organic matter content. Compared with control group, the average effective soil moisture content increased 4.41 g/kg and soil organic matter content increased 0.75g/kg.(3) Application of microbial fertilizers in Saline Alkali land can effectively reduces the test soil PH. Compared with the control group, the average decrease of soil pH in 0.25.(4) Application of microbial fertilizers in Saline Alkali land can effectively improve soil fertility. Compared with control group, embodied in increaseing the average content of soil Hydrolysis 8.45g/kg, the average increase in soil available phosphorus content 17.98 g/kg. (5) Application of microbial fertilizers in Saline Alkali land, the subjects of plant leaves proline and MDA content significantly decreased, fertilization compared with the control group, the average proline content in plant leaves decreased 8.65μg/g, the average MDA reduce 4.57μg/g.Experimental data show that the microbial fertilizers can effectively improve the soil of Saline Alkali land properties, and maintain a long-term effectiveness of its planting to play an effective protection...