| 摘要: |
| 应用温网室研究方法,对陕西省4种主要农田土壤的养分状况进行了实验室分析、吸附试验和温室盆栽试验,结果表明,黄绵土养分缺乏顺序为P>N;塿土的养分限制因子为P>N>Zn>Mg, S和Mo的供应亦不足;潮土主要缺磷,其次是Mn、Zn和Cu;黄褐土的主要障碍因子是N、P,Mo和S也显示不足,其它元素可满足作物生长需要。上述方法能较好地用来评价土壤养分状况并能迅速准确地确定土壤养分的限制因子及其缺乏程度。 |
| 关键词: 土壤养分，限制因子，温网室研究 |
| DOI： |
| 分类号:S158.3 |
| 基金项目: |
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| Systematic Diagnosis on Soil Nutrient as Limitation Factors |
|
Zhang Shulan Lu Dianqing Li Ying
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| Abstract: |
| With the greenhouse/screenhouse technique,the nutrient survey on four main farmland soil types in Shaanxi are conducted through laboratory analysis,sorption sutdy and greenhouse planting experiment.THe result showed that in yellow cotton soil the degree of nutrient-deficiency was P>N;in Lou soil,plant nutrients with limiting effects were P>N>Zn>Mg,and S and Mo were also insufficicnt;in Chao soil,P>Mn>Zn>Cu.While in yellow cinniamon soil,N and P were the two major limiting factors,and Mo and S were not also enough for plants;the other elements were not defficient.The method above can be used to determine the limiting factors and their defficiency degrees,and evaluate nutrient states in soil. |
| Key words: soil nutrient,limiting factors,screenhouse study |
