Dissertation > Excellent graduate degree dissertation topics show

Evaluation of Cultivated Land Productivity of Zhalantun City

Author: LiuPeng
Tutor: XuXiaoXun
School: Sichuan Agricultural University
Course: Utilization of Agricultural Resources
Keywords: cultivated land fertility evaluation Environmental quality of cultivated land analytichierarchy process
CLC: S158
Type: Master's thesis
Year: 2012
Downloads: 18
Quote: 0
Read: Download Dissertation

Abstract


Abstract:According to the Evaluation of Cultivated Land principles and expert knowledge, Evaluation of Cultivated Land of ZhaLanTun City set15factors in four items below:site conditions(Slope, topographic position,≥10℃accumulated temperature, surface gravel coverage), soil management(irrigation guarantee rate, rotation system, erosion degree), profile construction(thickness of soil humus, effective thickness of soil layer,soil Body configuration), physical and chemical properties(organic matter, available phosphorus, available potassium, available zn, available mo). The weights of various evaluation indices are determined by AHP. The panels assess the membership degree of the evaluation index and cultivated land fertility and give the corresponding evaluation value.At last use the fuzzy comprehensive evaluation method to determine the cultivated land fertility.Through laboratory analysis of soil samples, water samples results, comprehensive evaluation of the Zhalantun cultivated land environmental quality.The results obtained are as follow;:(1) The average organic matter content of the city’s land soil is44.5g/kg, the organic matter content is rich; the cultivated land soil total nitrogen content is relatively high, the average is2.18g/kg; the cultivated land soil available phosphorus content is relatively high, the average is17.4mg/kg;the cultivated land soil available potassium is relatively high, the average is174mg/kg.(2) According to the Zhalantun evaluation unit of integrated fertility index of cultivated land, we divided the cultivated land fertility into nine grades reasonably.Which,the first order land is7211.7hm2,the secondary land is12964.1hm2. And the third land is22198.7hm2, The fourth land is33855.30hm2,The ffifth land is39855.10hm2.The sixth land is39058.10hm2.The seventh land is26262.80hm2.The eighth land is15546.9hm2.The nineth land is2552.3hm2.And the fertility of grade one to nine accounted for3.61%,6.50%,11.13%,16.97%,19.98%,19.58%,13.16%,7.79%,1.28%respectively.(3) According to the soil environmental quality standard,the Environmental Quality of the Part of the cultivated land in the Tiedong Office is mild polluted, the integrated pollution index is1.453, the pollution elements is cadmium, the soil cadmium content exceeding2times;Comprehensive pollution index of the Tiexi office sample is0.697, it is close to the warning limits,The other comprehensive pollution index, of the sampling points are less than0.7, Environmental quality status of the cultivated land is clean,in line with the pollution-free agricultural products, green food production producing environmental quality standards.

Related Dissertations

  1. An Information System for Cultivated Land Fertility Evaluation Based on ComGIS,S126
  2. Research on Plant Landscape Evaluation in Yangmingshan Forest Park, Hunan,Q948
  3. The Research on the Development Potential Evaluation of Regional Hot Spring Tourism Resources,F592.7
  4. Evaluation Analysis and Difference Comparison of Eco-tourism Resources between Fujian and Taiwan Province,F592.7
  5. Analysis on Coal Import Origin of China,F752.61
  6. Study on Sustainable Development of Fuxin Coal Industry,F426
  7. Study on Safety Assessment and Optimization of Mine Ventilation System,TD724
  8. Comprehensive Evaluation and Optimization of Tobacco Logistics Distribution Network Layout,F252
  9. Study on Performance Analysis Model of Safety Evaluation,X913.4
  10. Application and Research on Auto Enterprise Safety Evaluation System,X922
  11. Study on the Safety Evaluation and Strategy of Crude Oil Transfer from Ship to Ship at Anchorage,U698.3
  12. Research of Laboratory Safety Management Assessment System in University,X959
  13. Study on Evaluation Method for Safety Risk of CO2Gological Storage,X511
  14. Study on Technology Selection and Promotion of Model of Small Towns and Villages Wastewater Treatment in Hubei Province,X703
  15. Analysis on Effect of Water Resources and Ecological Environment Based on Excavate Coal,X82
  16. Research on Monitoring and Evaluation Methods of Energy Consumption Index of Rail Transportation Enterprises,F532
  17. Research on Reliability-centered Maintenance of ZPW-2000A Track Circuit Equipment,U284.92
  18. Operational Organization and Equipment Capability Assessment on Chengdu East Railway Station,U291.6
  19. Study on Plant Location Selection and Inventory Setup in China by Automotive Company,F253.4
  20. Research on Contract Risk Management in Airport Construction Project Based on the Contractor,TU723.1
  21. Reseach on Process Post-evaluation of Water Engineering for Building,TU71

CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil fertility (soil fertility )
© 2012 www.DissertationTopic.Net  Mobile