| 摘要: |
| 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。 |
| 关键词: 陕西土壤,吸附特性,养分状况,养分平衡 |
| DOI： |
| 分类号:S158.3 |
| 基金项目:陕西省自然科学基金资助项目(96SM24) |
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| The adsorption characteristic and biological availability of soil nutrients in Shaanxi |
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LIANG Dong li,LI Xiao ping,ZHAO Hu bing,GU Jie,LIANG Dong li,LI Xiao ping,ZHAO Hu bing,GU Jie,LIANG Dong li,LI Xiao ping,ZHAO Hu bing,GU Jie
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| Abstract: |
| Chemical analysis,adsorptive reaction and biological diagnosis were systematically employed to study the status of nutrients in five soils to determine the demanding order for fertilizers.The results showed that N and P deficiency widely existed in the soils,followed by K,S,Cu,Zn deficiency,and B in paddy soil.The added concentration nutrients and adsorptive amount had a good correlation among all test elelments and test soils.Except paddy soils,Cu,Zn,Mn adsorption rates were not effected by soils.P.S.and B adsorption differed among the five soils.Biological diagnosis tests showed that OPT was reasonable to some extent.Crop growth was identical with the results of chemical analysis and adsorption tests. |
| Key words: adsorption,nutrient balance,soil,limted factor |
