| 白浆土－植物系统营养物质转化机制及其有效性研究——Ⅰ．32P同位素示踪法对白浆土中P肥利用率 |
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| 引用本文： | 李法云,高子勤.白浆土－植物系统营养物质转化机制及其有效性研究——Ⅰ．32P同位素示踪法对白浆土中P肥利用率[J].生态学杂志,1996,7(2):174-178. |
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| 作者姓名： | 李法云 高子勤 |
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| 作者单位： | 中国科学院沈阳应用生态研究所, 沈阳110015 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用32P同位素示踪法对白浆土中P肥利用率进行了研究.结果表明,在岗地白浆土上,表层土壤表现出一定程度的供P不足现象,白浆层土壤有效P含量严重缺乏.表层土壤中当季P肥利用率的变幅范围为6.09～12.35%,白浆层土壤P肥利用率为13%左右.施用有机肥能明显提高白浆土Olsen P的含量,加速土壤本身P的活化,各种有机物中,以猪粪对土壤潜在P的活化效果最好.将Olsen P与X值、A值比较,认为Olsen P是评价白浆上P肥力简便易行的可靠指标.
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| 关 键 词： | 32P同位素示踪 白浆土 P肥利用率 |
| 收稿时间： | 1995-10-04 |
Transformation mechanism and availability of nutrients in albic soil-plant system———Ⅰ.Phosphorus utilization rate in albic soil: a tracing study |
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| Li Fayun,Gao Ziqin.Transformation mechanism and availability of nutrients in albic soil-plant system———Ⅰ.Phosphorus utilization rate in albic soil: a tracing study[J].Chinese Journal of Ecology,1996,7(2):174-178. |
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| Authors: | Li Fayun Gao Ziqin |
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| Institution: | Insti tute of Applied Ecology, Academia Sinica, Shenyang 110015 |
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| Abstract: | The tracing study with 32P isotope shows that the supply of phosphorus in topsoil is insufficient and the amount of available phosphorus in Aw soil is fairly lack. The utilization rate of phosphorus fertilizer in topsoil ranges from 6. 09 to 12. 35% and that in Aw soil is 13% or so. Application of organic fertilizer can increase the content of Olsen P in albic soil and mobilize potential phosphorus. Fertilizing feces is the best way to mobilize the potential phosphorus in soil. Olsen P is the reliable index to evaluate the phosphorus fertility of albic soil. |
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| Keywords: | 32P isotope tracing Albic soil Phosphorus utilization rate |
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