Monitoring And Evaluation Of Black Soil Deterioration In Jilin Province Based On The 3S Technology

The black soil degeneration is a worldwide basis very serious environment question, our country black earth degeneration phenomenon is quite serious, pays great attention the ecological environment now in various countries, pursues the sustainable development under the situation, it is necessary to increase the research which degenerates to our country black earth. The black earth degenerates already the threaten seriously regional agriculture development. After the black earth opens up wasteland, the soil ulmin content starts to reduce, the nutrient loses balanced, physical character worsening. It already involves the natural factor also to involve to the human factor disturbance, but causes the black earth unceasing degeneration, formerly regarding the black earth degeneration question's research was from the synthesis factor consideration black earth degeneration question, will degenerate between the phenomenon and the mechanism not the very good engagement, this article from the different angle which and formerly studied studies the black earth degeneration question, the research black earth degeneration mechanism and between the black earth degeneration characteristic relations。This article through the generalized analysis, selects the Jilin Province Dehui the research region which degenerates as the black earth, is mainly considered this region existence multiple terrain landform structure, simultaneously also has many kinds of types the black earth degeneration characteristics. This article is mainly carries on the overall analysis through the GIS technology to the entire research area, carries on the variance statistical analysis through the SPSS software to the data, has analyzed this research area zones of different, the different black earth degeneration mechanism displays between the characteristic difference and the change, carry on the proof analysis through on-the-spot investigation to the findings, obtains the research results and the actual situation match case。Through to studies the area the research to draw the following conclusion: 1. black earth water erosion degeneration characteristic the water erosion degenerates the chief feature is displays in the soil bulk specific gravity increases, the soil body to appear hardens, the soil permeability difference gross porosity changes obviously is small. The soil chemical property is also at the same time obvious, mainly has fast-acting N, the P content to reduce in the same region content has the sudden change phenomenon. The entire N content has reduces. Entire P close normal black earth degeneration standard. 2. black earth wind erosion degeneration characteristic the wind erosion degeneration characteristic is mainly soil body physical property reduction with in the productivity drop, the physical property is mainly the soil body structure is incomplete, the thickness of soil layer thins the organic content to reduce, the soil mold-cover thins, the plow sole shoal. The landscape structure performance is low for the vegetation degree of coverage, the soil presents degenerated phenomena and so on broken the xipi. 3. human factor degeneration characteristic the need which lives along with the people, the jamming the influence chief feature which degenerates to the black earth is the people opens up wasteland to the black earth lacks to the natural protection consciousness, does not have the reasonable development and the use, creates the land capability the drop, the organic matter reduction rate increases, produces throws changes is smaller than, the ecosystem is destroyed seriously, the soil receives the serious contaminated soil toxicity to increase. The land physical structure performance reduces for the organic content, withers and falls the thing to contain the quantitative change small soil body vertical lamination to be obvious. through present paper's analysis result the black earth degeneration region which produces to the different black earth degeneration mechanism, proposed that the synthesis black earth degeneration prevention and the protective measures, the goal is realizes the land resource and people's economic growth coordinated development. Realizes the resources and humanity's sustainable development finally.