Assessment On Health Of Agricultural Land In The Northeastern Part Of Henan Province

Human activity impact on global environment has been continuously strengthened from the breadthand depth of global change that happened over a period of times. The surface of the earth has to confrontedenvironmental pollution, shortage of water resources, ecosystem degradation, soil erosion, loss ofbiodiversity, atmospheric chemical composition change, piscatorial recession, climate change and otherissues, especially the agricultural land ecological pollution environment and its harm to human health isvirtually inevitable in management for agriculture modernization. Land is an indispensable material of landecosystem for human being, land use or land cover change not only affects terrestrial ecosystem processesfunctions, also on the atmospheric system and marine ecosystem. It is objective to analyze fertility, heavymetal pollution, and organic pollution, irrigation water pollution for the agricultural land health assessmentand prevention control programs, taken Jindi River Basin as an example. Combining classification methodof agricultural land pollution with harm to human body health which is directly supplies food by localfields to evaluate agricultural land health and give reasonable suggestions. The research achieves somemain conclusions; we must adopt the above mentioned measures in this research paper. The main outcomesare as follows:First, the comprehensive quality of agricultural land fertility was based on test data which is had beenexperimented in environmental chemistry laboratory. Using factor analysis method to calculate the weightof every factor for conform to constant value, standard value and limit value of land fertility and applymembership experience formula to calculate the sampling point fertility in study area for the goal ofagricultural land health quality assessment in order to avoid soil fertility index weight interference ofexperimenter, according to relationship between fertility and cultivated land production, i.e. in a certainrange of soil fertility and crop growth reaction or crop production present a correlation. Then, we grade thesoil fertility synthetically degree of paddy soil, red soil, black soil and tide soil were based on thereferenced state classification proposals. The agricultural land comprehensive quality average score offertility is six point, which is closed to soil nutrient in research area for most soil sample point fertility as inmedium-level or poor situation.Second, the agricultural land irrigation water pollution was based on dynamic observation in thetwelve-month period of2011year according with demands of social development. By comparison withZiludi that existing today, the annual average content change presents increasing tendency and monthlyaverage contents presents a general weak implication of decreasing; others as time went on, many changestook place in research area. In order to achieve some ends, we adopt the above mentioned measures toobtain test data of eleven factors that we selected in experimentation. After take nearly twelve monthsdoing test to evaluate the pollution elements for the dynamic observation, we finally selected eleven factors,such as chemical oxygen demand and ammonia-nitrogen, etc, for the irrigation water assessment. Inconclusion, the comprehensive irrigation water quality of agricultural land was based on test data which is had been experimented in environmental chemistry laboratory for computing assessment index scoresrespectively, the outcome is placed in the middle of agricultural land irrigation water pollution column.Third, the atmospheric environment pollution evaluation is based on the data of atmospheric automaticmonitoring instrument in study area during a period of time in2011year, which to combining with soilfertility and irrigation water pollution reflects off agricultural land environment pollution degree. It isaccording to atmospheric automatic monitoring of atmospheric all-weather detection standard of state, theair pollutant concentration and objective, such as sulfur dioxide, nitrogen oxide and inhalable particles were0.0261milligram per cubic meter,0.09059milligram per cubic meter and0.1539milligram per cubic meterrespectively.Fourth, an assessment of agricultural land heavy metals pollution depended on national standard. It isapplicable to farmland, vegetable land, tea garden land, orchard land and grass soil, as a reference criteriato calculate single point pollution level and give reasonable environmental quality classification orevaluation of soil in order to refect heavy metal pollution degree of soil in researching area according tosoil environmental quality standards. Conclusions show that soil heavy metal and organic materialcontamination degree were less than soil environmental quality standard, except for DDT in Xuzhang andChenqiao village study area which is reference to feeble risk of agricultural land heavy metal and pollutionindex value respectively.Fifth, according to metal standards evaluate land heavy metal pollution. With determination analysisof test results to judge soil surface soil heavy metal pollution from point of sample, the research conclusionshow that agricultural land heavy metal content presents normal distribution tendency in comparison withsoil background values of Henan province and China soil quality environment. Accordinggeo-accumulation evaluation index of soil heavy metal pollution assessment method, which proposed byG.Muller, to evaluate heavy metal pollution index, classification and evaluation in order to compute soilcontamination degree in the agricultural land surface.Sixth, potential ecological risk assessment based on the test data of agricultural land heavy metals.According agricultural land heavy metal potential ecology harm index formula, toxicity coefficient,potential ecological risk index to evaluate potential ecological risk, the research results show that theagricultural land potential ecological risk is slighter. In addition, Nan wangzhuang, Huayuan, andZhangzhai three villages were in the middle state of mercury potential ecological risk on one hand, andpotential risk of researching in the study area is lesser than national standard on the other hand.Seventh, agricultural land heavy metals were objective to evaluate on the basis of test data. It is fullyto reflect various pollutant distributions and emphasize outstanding contribution value of high pollutant onsoil environment quality, using Nemerow pollution index model to calculate the soil heavy metal pollutionrisk and classifying comprehensive soil heavy metal pollution degree, according correlative analysis ofpollutant test data of sample point from researching area. The conclusion show that study results of thisexperiment correlate with soil heavy metal pollution level, which is rarely exceed standard of nationalenvironment of soil, and the pollution degree belongs to mild pollution degree or slighter. Eighth, comprehensive agricultural land health assessment and human health assessment are dependedon test data of agricultural land heavy metals, irrigation water pollutant and agricultural air pollutant. Theland health factors were normalized to calculate matrix relationship coefficient for rank factors, which iscombine with the health risk of environment standard. Then, calculating concentration heavy metal dailyintake, especially, Pb, Mn, Ni, Cr, Co and As contents risk index value more than1milligram, which is notkeep within the daily average tolerance maximum on the basis of human health evaluation in researchingheavy metal exposure area.