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将参与土壤质量评价的各个指标项实测值,按等比数列计算出评比指数,然后将评比指数积分进行综合评价.以陕西省36个县市1401个耕层土样测定结果和有关资料算出评价指标,将土壤质量分成6个等级,积分率(%)由>83～<43,土壤分成油、沃、肥、中、低、瘦6个丰度.同理,将限制土壤生产力的各因素皆作为障碍因子,并定出障碍限值进行评价.评价结果与四种作物产量的关系是:小麦r=0.995,糜子r=0.91,谷子和玉米未达5%显著水平.而上述四种作物产量与积分率(%)相关r=0.593.本法简单、实用,反映了土壤肥力并能表明土壤存在问题.
Will participate in the evaluation of soil quality indicators of each measured value, calculated according to the geometric ratio of the index, and then the index score integrated evaluation.According to the determination of soil samples in 1401 topsoil in 36 counties in Shaanxi Province and the relevant data to calculate the evaluation Index, the soil quality is divided into six grades, the integral rate (%) from> 83 ~ <43, the soil is divided into oil, fertile, fertile, medium, low, thin 6 abundance Similarly, the factors that limit soil productivity All of them were used as obstacle factors, and the obstacle limits were determined for evaluation.The relationship between evaluation results and yield of the four crops was as follows: wheat r = 0.995, millet r = 0.91 and millet and maize less than 5% Yield and integration rate (%) Correlation r = 0.593 This method is simple and practical, reflecting soil fertility and indicating soil problems.