CN104713996A - Method for determining pH value of soil - Google Patents
Method for determining pH value of soil Download PDFInfo
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- CN104713996A CN104713996A CN201310675820.6A CN201310675820A CN104713996A CN 104713996 A CN104713996 A CN 104713996A CN 201310675820 A CN201310675820 A CN 201310675820A CN 104713996 A CN104713996 A CN 104713996A
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Abstract
The invention relates to determination of the pH value of soil, and concretely relates to a method for determining the pH value of soil. A whirlpool mixer is used to substitute a stirring and shaking device, and the whirlpool mixing time is optimized. The method has the advantages of time saving, simplicity and good accuracy.
Description
Technical field
The present invention relates to the mensuration of pH value in soil, specifically a kind of assay method improving soil pH value.
Background technology
Soil acidity or alkalinity is one of important fundamental property of soil, the form exist nutrient in soil and validity, and the physicochemical property of soil, microbial activities and growth and development of plants all have a great impact.Because the validity of the necessary nutrient of most of crop is relevant with soil pH value, therefore can according to the effective condition of nutrient in the pH value assessment soil of soil.And nearly ten years, along with using in a large number of chemical fertilizer especially nitrogenous fertilizer, soil acidification phenomenon is particularly serious, therefore more should strengthen the monitoring to agricultural soil pH value.(document 1: Lu Rukun, soil agrochemistry analytical approach, Beijing: Chinese agriculture Science Press, 2000:12-16)
At present, the method for general mensuration soil pH value is main with reference to " mensuration (GB7859-87) of forest soil pH value ".Main step is, take by the air-dry soil sample 10g of 2mm sieve aperture in 50ml beaker in tall form, add 25ml without the distilled water of carbon dioxide or 1.0mol/L Klorvess Liquid (sour earth measure with) or 0.01mol/L calcium chloride solution (neutral, calcareous or alkaline soil measure with).With glass bar vigorous agitation 1-2min, static 30min, now should avoid the impact of Ammonia in Air or volatile acidic gas etc., rear pH meter measures.But, when using the method to measure, in manual glass bar agitation step, be difficult to grasp frequency and dynamics, reach the object that each sample stirs." People's Republic of China's agricultural industry criteria (the mensuration NY/T1377-2007 of soil pH) " that release subsequently revises the preparation process of soil pattern solution, that is: 10.0g sample is taken, add 25ml distilled water (or potassium chloride or calcium chloride solution), after seal of vessel, with oscillator or stirrer, concuss or stirring 5min, then leave standstill 1h-3h.Amended assay method is still unfavorable for that laboratory behaviour does: (1) concussion is suitable for batch sample and carries out simultaneously, also carry out next step operation (as filtered) simultaneously, but soil pH needs pH electrode to insert soil pattern solution left standstill a period of time when measuring, pH value could be read, stabilization time, length was not identical, the time left standstill after certainly will will affecting sample specimens solution preparation below, magnetic agitation cause a collection of sample determination condition inconsistent (2) although can overcome above-mentioned shortcoming, but stirrer taking-up from sample solution can be taken out of a small amount of soil after stirring, water and magnetisable material, simultaneously for keeping fixing soil ratio, sample solution can not be washed with water, soil pattern solution composition certainly will be affected.As can be seen here, be manual operation, concussion or the method for stirring is not desirable pre-treating method, require further improvement.
Summary of the invention
The object of this invention is to provide a kind of reproducible, reappearance is high, and is suitable for the soil pH value assay method measuring batch sample.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of method measuring soil pH value, take by the air-dry soil sample 9g ~ 11g of 2mm sieve aperture in 50ml beaker, add 25ml without the distilled water of carbon dioxide or 1.0mol/L Klorvess Liquid or 0.01mol/L calcium chloride solution, beaker is placed on eddy mixer and shakes 1-3min, leave standstill 30min, measure the pH of solution with pH meter, be soil pH value.
Described Klorvess Liquid is for measuring sour earth, and without the distilled water of carbon dioxide for measuring neutral soil, calcium chloride solution is for measuring neutrality, calcareous or alkaline soil.
Described mensuration soil pH value is 4-9.
When described mensuration soil adopts Klorvess Liquid as solvent, pH value is 4-7.
When described mensuration soil adopts calcium chloride solution as solvent, pH value is 7-9.
When described mensuration soil adopts distilled water without carbon dioxide as solvent, pH value is 6-8.
Described whirlpool mixing 1min is more suitable for batch sample and measures.
Innovation of the present invention is to use eddy mixer to replace stirring and rocking equipment, following advantage:
1. this instrument is time saving and energy saving.Eddy mixer volume is little, power consumptive province, and noise is low, vibration and whirlpool is combined, and substantially reduces the incorporation time of sample, save manpower and materials under well-mixed prerequisite.
2. use the test method precision of this instrument improving high, accuracy is good.The more common concussion of solid-liquid Blending Efficiency of Blending of eddy mixer is compared with stirring and is as good as, but in mensuration soil pH value method, more above-mentioned two kinds of instruments are more applicable.Therefore and be not suitable for succusion biased sample 1) concussion is modal solid-liquid mixed method, and is applicable to batch sample, but has continuity in time owing to measuring pH value.2), after using magnetic stirring apparatus mixing, stirrer taking-up from sample solution can be taken out of a small amount of soil, water and magnetisable material, soil pattern solution composition certainly will be affected.As can be seen here, eddy mixer can overcome above-mentioned shortcoming, improves the accuracy measuring soil pH method.
Embodiment
Take standard soil sample GBW07412a(Liaoning brown earth), GBW07414a(Purple Soils In Sichuan Province) and GBW07416a(Red Soil) 10.00g is in 50ml beaker in tall form, add the distilled water of 25ml without carbon dioxide respectively, 0.01mol/L calcium chloride solution, and 1.0mol/L Klorvess Liquid.Whirlpool mixing 1-3min or use magnetic stirrer 5min, leaves standstill 30min, measures soil pH value with pH meter (Instruments pH510), and each sample repeats for 3 times, and result is as shown in table 1.
Table 1 standard soil sample pH measurement result
Measurement result shows, whirlpool mixing all increases compared with the degree of accuracy of magnetic agitation mixed determining result and accuracy, whirlpool incorporation time 1-3min, and wherein 1min is more suitable for the mensuration of batch pedotheque.
Claims (7)
1. measure a method for soil pH value, its special type is:
Take by the air-dry soil sample 9g ~ 11g of 2mm sieve aperture in 50ml beaker, add 25ml without the distilled water of carbon dioxide or 1.0mol/L Klorvess Liquid or 0.01mol/L calcium chloride solution, beaker is placed on eddy mixer and shakes 1-3min, leave standstill 30min, measure the pH of solution with pH meter, be soil pH value.
2. according to the method measuring soil pH value described in claim 1, its special type is: described Klorvess Liquid is for measuring sour earth, and without the distilled water of carbon dioxide for measuring neutral soil, calcium chloride solution is for measuring neutrality, calcareous or alkaline soil.
3. according to the method measuring soil pH value described in claim 1, its special type is: described mensuration soil pH value is 4-9.
4. according to the method measuring soil pH value described in claim 3, its special type is: when described mensuration soil adopts Klorvess Liquid as solvent, pH value is 4-7.
5. according to the method measuring soil pH value described in claim 3, its special type is: when described mensuration soil adopts calcium chloride solution as solvent, pH value is 7-9.
6. according to the method measuring soil pH value described in claim 3, its special type is: when described mensuration soil adopts distilled water without carbon dioxide as solvent, pH value is 6-8.
7., according to the method measuring soil pH value described in claim 1, its special type is:
Described whirlpool mixing 1min is more suitable for batch sample and measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310675820.6A CN104713996A (en) | 2013-12-11 | 2013-12-11 | Method for determining pH value of soil |
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| CN201310675820.6A CN104713996A (en) | 2013-12-11 | 2013-12-11 | Method for determining pH value of soil |
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| CN104713996A true CN104713996A (en) | 2015-06-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219107A (en) * | 2017-06-22 | 2017-09-29 | 湖北富邦科技股份有限公司 | A kind of assay method of oil body anti-caking agent pH value |
| CN109470545A (en) * | 2018-11-13 | 2019-03-15 | 东北农业大学 | A kind of improved method of soil pH value measurement |
| CN111458394A (en) * | 2020-05-08 | 2020-07-28 | 广西壮族自治区农业科学院 | Method for measuring acid-base content of soil |
| CN115629114A (en) * | 2022-11-17 | 2023-01-20 | 重庆市农业技术推广总站 | Soil pH detection method |
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| JP3208122B2 (en) * | 1998-12-09 | 2001-09-10 | 核燃料サイクル開発機構 | Molded body for measuring pH of pore water in soil and pH measuring method using the same |
| US6356830B1 (en) * | 1998-08-11 | 2002-03-12 | Purdue Research Foundation | System and method for automated measurement of soil pH |
| CN102565151A (en) * | 2012-01-18 | 2012-07-11 | 北京盈胜泰科技术有限公司 | Device and system for detecting soil acidity and alkalinity |
| CN102788791A (en) * | 2012-08-10 | 2012-11-21 | 青岛农业大学 | Fast determination method for soil acidity and alkalinity and determination device thereof |
| CN103123345A (en) * | 2013-02-06 | 2013-05-29 | 中国烟草总公司四川省公司 | Method for rapidly detecting phenoxyacetic acid herbicide in soil |
-
2013
- 2013-12-11 CN CN201310675820.6A patent/CN104713996A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6356830B1 (en) * | 1998-08-11 | 2002-03-12 | Purdue Research Foundation | System and method for automated measurement of soil pH |
| JP3208122B2 (en) * | 1998-12-09 | 2001-09-10 | 核燃料サイクル開発機構 | Molded body for measuring pH of pore water in soil and pH measuring method using the same |
| CN102565151A (en) * | 2012-01-18 | 2012-07-11 | 北京盈胜泰科技术有限公司 | Device and system for detecting soil acidity and alkalinity |
| CN102788791A (en) * | 2012-08-10 | 2012-11-21 | 青岛农业大学 | Fast determination method for soil acidity and alkalinity and determination device thereof |
| CN103123345A (en) * | 2013-02-06 | 2013-05-29 | 中国烟草总公司四川省公司 | Method for rapidly detecting phenoxyacetic acid herbicide in soil |
Non-Patent Citations (1)
| Title |
|---|
| 国家标准局: "森林土壤pH值的测定", 《中华人民共和国国家标准》, 1 June 1987 (1987-06-01) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219107A (en) * | 2017-06-22 | 2017-09-29 | 湖北富邦科技股份有限公司 | A kind of assay method of oil body anti-caking agent pH value |
| CN109470545A (en) * | 2018-11-13 | 2019-03-15 | 东北农业大学 | A kind of improved method of soil pH value measurement |
| CN111458394A (en) * | 2020-05-08 | 2020-07-28 | 广西壮族自治区农业科学院 | Method for measuring acid-base content of soil |
| CN111458394B (en) * | 2020-05-08 | 2023-08-08 | 广西壮族自治区农业科学院 | Method for measuring acid-base content of soil |
| CN115629114A (en) * | 2022-11-17 | 2023-01-20 | 重庆市农业技术推广总站 | Soil pH detection method |
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Application publication date: 20150617 |