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应用化学分析、吸附反应和生物诊断的方法,系统研究了陕西省关中土娄土、汉中水稻土、渭北黑垆土、陕北黄绵土和秦巴山区黄泥巴等5种主要土壤养分的丰缺状况,确定了供试土壤的养分限制因子。结果表明,5种主要土壤普遍缺P和N,部分土壤中K,S,Cu,Zn供应不足,水稻土含B量极低。各养分含量与吸附量均呈极显著的直线相关,除水稻土外,土壤对Cu,Mn,Zn的吸附因土壤差异较大。生物学试验结果表明,OPT的估计是合理的,作物生长情况与化学分析结果和吸附试验相吻合。
The application of chemical analysis, adsorption reaction and bio-diagnosis methods to systematically study the abundance and deficiency of five main soil nutrients in Guanzhong loess soil, Hanzhong paddy soil, Weibei black loam soil, loessial soil in North Shaanxi and Huangniuba in Qinba mountain area Condition, determine the soil nutrient limit test factors. The results showed that there was a general lack of P and N in the five main soils. The supply of K, S, Cu and Zn in some soils was insufficient, and the content of B in paddy soils was extremely low. Each nutrient content and adsorption amount showed a significant linear correlation, except for paddy soil, soil adsorption of Cu, Mn, Zn due to soil differences. Biological test results show that the OPT estimate is reasonable, crop growth and chemical analysis results and adsorption experiments are consistent.