| Agricultural is the foundation of the national economy, with the advent of the industrialrevolution, the development of agro-ecological environment quality suffered increasinglysevere damage, and at the same time the salinization of arable land by more harzards. Thissituation has seriously affected the sustainable development of agriculture and food security.Therefore, this paper agricultural ecological environment quality of Luyang Lake inWeinan,Shaanxi saline areas as research object, by measuring the various physical andchemical properties of saline soil. Using principal component analysis, correlation analysis,the membeiship function method, index of weighted summation and other methods on soilfertility quality, salinity characteristics were analyzed andevaluated; Using single factor indexmethod and inside plum qality pollution index method (heavy metal pollution) evaluate thesoil envirpnment quality, using the add notes to scoring method evaluate the groundwaterquality. We can understand the status of saline area of agricultural ecological environmentquality, and can provide the basis for effective remediation measures through the abovecontents of agricultural ecological environment quality evaluation results about Luyang LakeSaline area. The results showe that:(1) Through the soil nutrient status of Weinan Luyang Lake saline area analysis, thebasic nutrient content was very low from the overall. But the phosphorus content was higher,especially the available phosphorus content was the highest in soil from a single nutrientindex and asingle sample point. At the same time, the available phosphorus content was thegreatest degree of variation and the most sensitive nutrients. The coefficient of variation fromlarge to small was available P﹥Alkaline hydrolysis nitrogen﹥TN﹥organic matter﹥available K﹥total phosphorus﹥pH. And at the same time,the nutrient has keep a verysignificant correlation.(2) Limiting factors of soil fertility order from strong to weak was pH﹥Alkalinehydrolysis nitrogen﹥TN﹥available P﹥organic matter﹥CEC﹥available K﹥totalphosphorus from the membership values of every indexs. This shows that，the pH value wasthe first factor limiting fertility. The soil has a strong protection and supply fertility’s capacityfrom the CEC’s membership values. Luyang Lake area of soil fertility index was0.4671, Belonging to low fertility levels though evaluated by weighted summation index evaluationmethod. The result was limit the normal growth of plants and consisted with the actual localsoil fertility status.(3) The saline area has a high surface soil salt content and decrease with increasingdepth though analyzing and evaluting the characteristics of soil salinization. Using theprincipal component analysis showed that the degree of alkalization have a highest score was22.517, pH’s scores was3.831.This result showed that the soil has a high degree of alkalineand. From the point of view ion score, Na+has a high score of0.522, indicating that the mainarea affected by salinity hazard sodium. The soil belongs to saline alkal soil in the most ofLuyang Lake area. According to the results of the analysis saline grading atandards andconsistent use of principal component analysis, which belongs to salinizayion earth,indicaying the principal component analysis is valid(4) The area of soil environment quality was good, and was not obviously polluted byheavy metal and pesticides from the analysis of soil environmental quality by single factormass index and nemerow pollution index.(5) Some environment indicators’ levels has been recorded and they has serouslyaffected the quality of the most regional groundwater quality. From the perspective of the totalhardness of water quality, the most regional groundwater quality belongs to brackish water,there were a few water belongs to fresh water. On the whole, the groundwater environmentwas a poor quality, affecting the production and living water.(6) Based on the above analysis, the quality of agicultural ecological environment wasnot good, was not optimistic of Luyang Lake saline area in Weinan city, Shaanxi Province.The results was seriously affected the local residents in agricultural production, living, socialand economic constraints which the sustainable development of agriculture. The main reasonfor this phenomenon was the serious local of soil salinization, which led to declining soilfertility. So there were much wasteland, cause serious waste of land resources. We should bebased on the actual and specific situation take the measures of the saline area. At the first, wecan take effective measures to control salinity hazard. And then take effective measures toinprove the management in accordance with other specific circumstances. |
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