| 土壤有效钾几种测定方法的比较研究 |
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| 引用本文： | 张素坤,霍习良,张俊梅,许皞.土壤有效钾几种测定方法的比较研究[J].河北农业大学学报,2001,24(1):16-20. |
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| 作者姓名： | 张素坤 霍习良 张俊梅 许皞 |
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| 作者单位： | 1. 河北省保定市农业委员会,
2. 河北农业大学农学院, |
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| 基金项目： | 河北省科委重点科研课题! (96 2 2 0 913D) |
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| 摘 要： | 以田间试验得到的每季作物耗钾量作参比，采用４种土壤有效钾测定方法：１mol.L^-1沸ＮＨＯ３法、１mol.L^-1醋酸铵法、阳离子交换树脂袋法和２mol.L^-1冷ＨＮＯ３法测定每季土壤有效钾与之比较，结果表明，２mol.L^-1冷ＨＮＯ３法能有效地反映土壤实际供钾状况。并对２mol.L^-1冷ＨＮＯ３测试方法作了少许改进，使之简便易行，适合批量测定。
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| 关 键 词： | 有效钾 供钾能力 测钾方法 土壤成分 |
| 文章编号： | 1000-1573(2001)01-0016-05 |
| 修稿时间： | 1999年7月9日 |
Comparison between several determination methods of available potassium in soils |
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| ZHANG Su-kun,HUO Xi-liang,XU Hao,ZHANG Jun-mei.Comparison between several determination methods of available potassium in soils[J].Journal of Agricultural University of Hebei,2001,24(1):16-20. |
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| Authors: | ZHANG Su-kun HUO Xi-liang XU Hao ZHANG Jun-mei |
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| Abstract: | The suitability of four methods for chemical extraction of available potassium in soils was studied by taking field experiment as the reference standard. The four methods were 2 mol· L- 1 cold HNO3 method, 1 mol · L-1NH4Ac method, Cation-exchange resin bag method and 1 mol·L-1 bofling HNO3 method. The results showed that the method of 2 mol· L- 1 cold HNO3 was the ideal one to evaluate the supply of soll potassium;while the change of 2 mol· L- 1cold HNO3 method made it mere simple and convenient for determination. |
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| Keywords: | available potassium K-supplying power determination method |
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