| Extraction of Soil Boron for Predicting Its Availability to Plants |
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| 作者姓名： | LI REN-AN U.C.GUPTA |
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| 作者单位： | [1]DepartmentofSoilScience,ZhejiangAgriculturalUniversity,Hangzhou310029（China） [2]ResearchBranch,ResearchS |
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| 摘 要： | Field and greenhouse studies were conducted in Prince Edward Island (P.E.I.) on soybean (Glycine max(L.) Merr.), red clover (Trifolium pratense L.),alfalfa (Medicago sativa L.), and rutabaga (Brassica napobrassica,Mill).Plant B concentrations were compared to soil B extracted by hot-water,0.05 M HC1,1.5 M CH3COOH and 0.01 M CaCl2.The r values for extractable soil B vs.plant B were:hot water (0.67),0.05 M HCl(0.82),1.5M CH3COOH(0.78) and hot 0.01 M CaCl2(0.61).Results of soil B from the 0.05 M HCl extracts were generally found to give the best correlation and linear regression among the four extractants tested for predicting the availability of B to the plants.Overall,the 0.05 M HCl proved to be superior to hot water extraction and is recommended for predicting the available B status of the acid soils of P.E.I.The probability of error with 0.05 M HCL is less since it is shaken for a fixed period of time as opposed to subjective error which could be caused in monitoring the boiling time using hot water.
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| 关 键 词： | 土壤 硼 提取 植物有效性 预测 |
Extraction of Soil Boron for Predicting Its Availability to Plants |
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| LI REN-AN,U.C.GUPTA.Extraction of Soil Boron for Predicting Its Availability to Plants[J].Pedosphere,1991,1(2):137-144. |
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| Authors: | LI REN-AN and UCGUPTA |
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| Institution: | Department of Soil Science, Zhejiang Agricultural University, Hangzhou 310029;Department of Soil Science, Zhejiang Agricultural University, Hangzhou 310029 |
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| Abstract: | Field and greenhouse studies were conducted in Prince Edward Island (P.E.I.) on soybean (Glycine max(L.) Merr.), red clover (Trifolium pratense L.),alfalfa (Medicago sativa L.), and rutabaga (Brassica napobrassica,Mill).Plant B concentrations were compared to soil B extracted by hot-water,0.05 M HC1,1.5 M CH3COOH and 0.01 M CaCl2.The r values for extractable soil B vs.plant B were:hot water (0.67),0.05 M HCl(0.82),1.5M CH3COOH(0.78) and hot 0.01 M CaCl2(0.61).Results of soil B from the 0.05 M HCl extracts were generally found to give the best correlation and linear regression among the four extractants tested for predicting the availability of B to the plants.Overall,the 0.05 M HCl proved to be superior to hot water extraction and is recommended for predicting the available B status of the acid soils of P.E.I.The probability of error with 0.05 M HCL is less since it is shaken for a fixed period of time as opposed to subjective error which could be caused in monitoring the boiling time using hot water. |
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