| 土壤保水剂与氮肥的互作效应研究 |
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| 引用本文： | 宫辛玲,刘作新,尹光华,舒乔生,李桂芳.土壤保水剂与氮肥的互作效应研究[J].农业工程学报,2008,24(1):50-54. |
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| 作者姓名： | 宫辛玲 刘作新 尹光华 舒乔生 李桂芳 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所辽宁省节水农业重点实验室,沈阳,110016;中国科学院研究生院,北京,100049
2. 中国科学院沈阳应用生态研究所辽宁省节水农业重点实验室,沈阳,110016 |
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| 基金项目： | 中国科学院三期创新基地课题
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国家科技支撑计划重大课题
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辽宁省节水农业重点实验室开放研究基金 |
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| 摘 要： | 为进一步揭示土壤保水剂与氮肥的互作效应,采用NH4Cl和KNO3作为指示氮肥,分析了6种保水剂的吸水保肥能力.结果表明:氮肥溶液中的离子强度、保水剂聚合物类型以及粒级是影响保水剂吸水率的关键因素.保水剂释放和吸收NH4 量高于NO3-量;其释放和吸附氮肥的能力,明显受粒级与生产过程中添加的复合成分的影响.保水剂与氮肥的互作效应主要受保水剂自身组成和结构及氮肥水溶液离子强度制约.研究表明土壤保水剂对氮肥的吸附使其具备保肥功能,对揭示其保肥机理具有重要理论意义.
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| 关 键 词： | 保水剂 氮肥 吸水率 相互作用 |
| 文章编号： | 1002-6819（2008）-1-0050-05 |
| 收稿时间： | 2006-11-18 |
| 修稿时间： | 2007-06-11 |
Interactive effects of super absorbent polymer and nitrogenous fertilizer |
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| Gong Xinling,Liu Zuoxin,Yin Guanghu,Shu Qiaosheng and Li Guifang.Interactive effects of super absorbent polymer and nitrogenous fertilizer[J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(1):50-54. |
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| Authors: | Gong Xinling Liu Zuoxin Yin Guanghu Shu Qiaosheng and Li Guifang |
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| Institution: | Key Laboratory of Liaoning Water-Saving Agriculture, Institute of Applied Ecology, Chinese Academy of Sciences,Shenyang 110016, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Liaoning Water-Saving Agriculture, Institute of Applied Ecology, Chinese Academy of Sciences,Shenyang 110016, China;Key Laboratory of Liaoning Water-Saving Agriculture, Institute of Applied Ecology, Chinese Academy of Sciences,Shenyang 110016, China;Key Laboratory of Liaoning Water-Saving Agriculture, Institute of Applied Ecology, Chinese Academy of Sciences,Shenyang 110016, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Liaoning Water-Saving Agriculture, Institute of Applied Ecology, Chinese Academy of Sciences,Shenyang 110016, China |
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| Abstract: | As the indicators of nitrogenous fertilizer, NH4Cl and KNO3 were applied with six kinds of super absorbent polymer (SAP) to study the relationship between SAP and nitrogenous fertilizer. Water absorbency (WA) and fertilizer conservation of SAP were studied. The results show that the ionic strength of the nitrogenous solution, polymer type and particle diameter are the most important factors on WA of SAP. The amount of NH4+ releasing and absorbing by SAP is much higher than that of NO3-. The ability of SAP releasing and absorbing nitrogenous fertilizer is influenced by the particle diameter and secondary component of SAP. The relationship between SAP and nitrogenous fertilizer is restrained by the composition and structure of SAP and the ion strength of the nitrogenous fertilizer solution. The results indicate that fertilizer conservation of SAP has the ability of absorbing nitrogenous fertilizer. It is important to disclose the mechanism of fertilizer conservation of SAP. |
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| Keywords: | super absorbent polymer nitrogenous fertilizer water absorbency interaction |
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