| Soil salinization has been a major factor restricting the development of agriculture inLuyang Lake, and the study on local soil production potential and improved measures willhelp reasonable improvement and the development and utilization of saline-alkali soil in orderto provide a scientific basis and reasonable reference proposal,taking into account localeconomic and ecological benefits. Therefore, this article use potential decay method toestimate the different degree of salinization of soil production against winter wheat and thephotosynthesis productive potential, thermal production potential as well as potentialproductivity of radiation, temperature and water of the local four major crops, by analyzingthe salinization characteristics and the physical and chemical properties of Luyang Lake soil,combining with the light, temperature, water, soil and other region climatic resources. Andestimated the temperature, moisture and soil correction coefficient of production potential,and also analyzed the factors that limit local soil production potential. Finally, providedrelational improved countermeasures through the analysis of the main factors causingsalinization. The main conclusions are as follows:1. The impact of temperature on the thermal production potential of the Luyang Lakevaries due to different crops. The temperature coefficients of winter wheat, summer corn,cotton, rape were0.57,0.64,0.62,0.57;In the rainfall conditions, the water coefficient ofwheat, summer corn, cotton and rape respectively were0.374,0.577,0.499,0.419; andcorresponding potential productivity of radiation, temperature and water were:5171kg/hm~2, the5896kg/hm~2,2475kg/hm~2,1740kg/hm~2; under the irrigation were0.655,0.818,0.926and0.731, corresponding potential productivity of radiation, temperatureand water were9057kg/hm~2,8358kg/hm~24592kg/hm~2, and3035kg/hm~2. Therefore, themoisture limit the play of the local crop production potential to some extent. But fouragricultural production potential can be improved by reasonable irrigation in Luyang Lake.2. The factor of salt play restrictions on soil production potential is relatively larger. Thesoil modification coefficient against winter wheat of no salinization, light salinization,moderate salinization and severe salinized soil were0.5960,0.4260,0.2658,0. Under the irrigation, land production potential for no salinization of soil, light salinization of soil,moderate salinization of soil and severe salinization of soil were5398kg/hm~2,3858kg/hm~2,2407kg/hm~2,0kg/hm~2; And in rainfall condition were3082kg/hm~2,2203kg/hm~2,1375kg/hm~2,0kg/hm~2. So soil production potential of different degree of salinization will havehigher room for improvement in Luyang Lake.3. Groundwater level and physical and chemical properties of soil are main improvedprevention factors. It can not be ignored.of unreasonable irrigation system andinappropriate agricultural technology.Severe salinization of soil not only need engineeringmeasures, but also need to combine chemically modified measures with biological measuresto repair the ecological environment of the soil; To moderate saline-alkali soil and mildsalinization soil, biological measures and agricultural practices can be improved soilconditions.4. Saline improvement is a comprehensive ecological improvement, so propose thestrategy of agriculture, forestry as well as animal husbandry development. Second, the localneeds the sound drainage system, and develop water-saving agriculture in order to improvethe utilization coefficient of irrigation water; adjusting the industrial structure andstrengthening fertility of severe salinization soil are very important prevention measures in2-3years; while the development and utilization of local main wild plants of S. salsa andreeds is particularly more important; and the establishment of regional water and salt dynamicmonitoring system can help to find the best control mode of macro-ecological and strategiesof environmental protection. |
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