CN102879229A - Method for in situ measuring saturated solution nutrients of submersed paddy field through suction filtration method - Google Patents
Method for in situ measuring saturated solution nutrients of submersed paddy field through suction filtration method Download PDFInfo
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- CN102879229A CN102879229A CN2012103611366A CN201210361136A CN102879229A CN 102879229 A CN102879229 A CN 102879229A CN 2012103611366 A CN2012103611366 A CN 2012103611366A CN 201210361136 A CN201210361136 A CN 201210361136A CN 102879229 A CN102879229 A CN 102879229A
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- suction filtration
- paddy field
- saturated solution
- submersed
- soil
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Abstract
The invention discloses a method for in situ measuring saturated solution nutrients of a submersed paddy field through a suction filtration method. Available nutrient and reducibility materials of soil of the submersed paddy field can be extracted in situ through the suction filtration method, and contents of nutrients of NH4<+>, N2PO4<->, K<+>, Fe<2+>, Mn<2+>, Zn<2+> and the like in filter liquid can be measured through a conventional analysis method. The method is simple, convenient and feasible to operate, can be used for quickly measuring the saturated solution nutrients of the submersed paddy field in a laboratory, and improves the testing efficiency.
Description
Technical field
The present invention relates to agricultural technology field, in particular the method for a kind of suction method in-site detecting waterflooding rice field saturated solution nutrient.
Background technology
Suction filtration is the process of instigating solid and liquid or gas to separate through porous filter medium.In chemical laboratory, Filter paper filtering commonly used, separating solids and liquid or gas.In the normal pressure filter process, along with the minimizing for the treatment of amount of filtrate in the funnel, the pressure that liquid produces also reduces thereupon.In addition the filter paper adsorption one deck solid particulate matter, so filter velocity is slack-off gradually.For fast filtering, can adopt filtration under diminished pressure method (suction filtration), funnel adopts the Buchner funnel of porcelain system, in put the circular filter paper that a diameter is slightly less than hopper base, Buchner funnel is contained on the bottle,suction with rubber plug, carries out suction filtration with syringe.
Suction method is used for measuring waterflooding rice field saturated solution nutrient, can gather the paddy field soil sample, and the solution that suction filtration goes out can directly be tested nutrient content after filtering.
That the processing of pedotheque comprises is air-dry, impurity elimination, levigate, sieve, the operating process such as mixing, bottling preservation and registration.
(1) air-dry and impurity elimination
The soil sample of adopting back from the field, except the bright sample of specific (special) requirements, generally in time air-dry.Its method be pedotheque is placed on shady and cool dry ventilate, indoor without special gas (such as chlorine, ammonia, sulphuric dioxide etc.), free from dust pollution again, be tiled on the clean kraft after sample broken into pieces, spread out into very thin one deck, and often stir, accelerate dry.Must guard against sunlight directly tans by the sun or toasts.After soil sample is slightly dried, large clod be crumbed (especially clayed soil), in order to avoid form be difficult to behind the lump levigate.After sample is air-dry, should sort out iron-manganese concretion, lime nodule or stone etc. in dry branches and fallen leaves, plant roots, stubble, polypide and the soil, if stone is too much, it is sorted out and weighs, write down shared percentage.
(2) levigate, sieve and preserve
When carrying out physical analysis, get air-dry soil sample 100～200g, be placed on the kraft, pulverize with wooden unit, be placed in cover the end No. 18 sieves (aperture 1mm), make it the sieve by 1mm, stay soil block on the sieve and be poured on the kraft again and again mill.So repeated multiple times, until all pass through.Must not abandon or omit, but chad is sure not crushing.Chad on the sieve should be sorted out and weigh and preserve, in order to the weigh usefulness of calculating of chad.Simultaneously the soil sample of sieving is weighed, to calculate the chad percent by weight, be contained in the wide-necked bottle after the pedotheque after then will sieving fully mixes, as the usefulness of particle-size analysis of soil samples and other determination of physical appearance.
During chemical analysis, get air-dry good soil sample such as above method it is ground, and make it all by No. 18 sieves (aperture 1mm).The pedotheque of gained can be in order to measure quick-acting nutrient, pH value etc.When measuring full phosphorus, soil nutrient content, the pedotheque by No. 18 sieves further can be ground, make it all by No. 60 sieves (aperture 0.25mm).When measuring full potassium, should with all by the pedotheque of No. 100 sieves (aperture 0.149mm), analyze usefulness as it.Behind the pedotheque mixing after grinding is sieved, in the wide-necked bottle of packing into.Existing collecting soil sample technology is fit to the dryland soil collection.Because the reducing substances in the paddy field is very easily oxidized, if the paddy field sample adopts the same procedure collection, then can cause paddy field reducing substances Measurement results inaccurate.
The strength factor of the redox of soil (oxidation-reduction potential) and quantity factor (reducing substances amount) are not only relevant but also two aspects distinguishing in the redox of soil process, soil redox status and soil nutrient status and with the relation of plant growth in, quantity factor plays an important role, measure reducing substances and can specifically represent this quantitative relation, and can disclose wherein shared proportion and the effect thereof of certain material.The aluminum sulfate solution lixiviate of soil reduction process material, leachate can be referred to as the reducing substances total amount by potassium bichromate solution oxidation person under high temperature and acidulated condition.Take aluminium sulphate as digestion agent the time, leachate under certain condition, utilize the effect of varying strength oxygenant, reducing substances can be divided into reducing substances total amount, active reduction material, ferrous iron and bivalent manganese, and can calculate active organic reducing substances.The method of this employing digestion agent test paddy field redox materials although adopt the fresh soil sample test, still can't guarantee the soil virgin state.Simultaneously, digestion agent can all extract the soil sample reducing substances, but can not accurate description soil supplies with and the relation of plant absorbing.
Summary of the invention
The present invention relates to the available nutrient method for measuring of a kind of paddy field.Technical matters to be solved by this invention: existing soil nutrient determination techniques requires and will measure after the soil sample air-dry sample preparation, soil nutrient and reducing substances total amount change to some extent under oxidizing condition, fully available nutrient and reducing substances situation under the reducing environment of actual response paddy field.Simultaneously, measure reducing substances in the existing measuring technology and adopt digestion agent to extract more, digestion agent can all extract the soil sample reducing substances, but can not the accurate description soil nutrient supplies with and the relation of plant absorbing.
Technical scheme of the present invention is as follows:
The method of a kind of suction method in-site detecting waterflooding rice field saturated solution nutrient is utilized available nutrient and the reducing substances of suction method in-situ extraction flooded paddy soil, and filtrate adopts conventional method of analysis can measure NH
4 +, H
2PO
4 -, K
+, Fe
2+, Mn
2+, Zn
2+Content Deng nutrient.
The present invention has easy to operation, and can fast at experimental determination waterflooding rice field saturated solution nutrient, improve testing efficiency.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Device required for the present invention comprises bottle,suction, Buchner funnel, hollow rubber plug, water conservancy diversion sebific duct, syringe, triangular flask, filter paper, beaker, 160DPVC pipe and article tray.Described filter paper places Buchner funnel, hollow rubber plug is inserted in Buchner funnel and accepts with bottle,suction, and described water conservancy diversion sebific duct is connected with bottle,suction, forms the suction filtration device, carries out suction filtration with syringe.Field operation steps: be positioned in the article tray of field the suction filtration device that connects for subsequent use, insert the field with the 160DPVC pipe, water is scooped out to holard state of saturation in will managing with flask again, getting one glass of soil sample with flask pours in the Buchner funnel on the suction filtration device, and begin suction filtration with syringe, filtrate reaches 35-50ml can stop suction filtration, by mozzle with the filtrate drainage to triangular flask, splash into 3-5 and drip the anti-oxidation of 0.5mol hydrochloric acid, can carry out the nutrient test after filtrate is taken back the laboratory and again filtered.
Filtrate adopts conventional method of analysis can measure NH
4 +, H
2PO
4 -, K
+, Fe
2+, Mn
2+, Zn
2+Deng the content of nutrient, for example, wherein, NH
4 +Measure H with " indophenol blue colorimetry "
2PO
4 -Measure K with " occluded corrosion cell "
+, Fe
2+, Mn
2+, Zn
2+Measure with " atomic absorption method ".
The present invention has easy to operation, and can fast at experimental determination waterflooding rice field saturated solution nutrient, improve testing efficiency.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (1)
1. the method for a suction method in-site detecting waterflooding rice field saturated solution nutrient is characterized in that, utilizes available nutrient and the reducing substances of suction method in-situ extraction flooded paddy soil, and filtrate adopts conventional method of analysis can measure NH
4 +, H
2PO
4 -, K
+, Fe
2+, Mn
2+, Zn
2+Content Deng nutrient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103611366A CN102879229A (en) | 2012-09-17 | 2012-09-17 | Method for in situ measuring saturated solution nutrients of submersed paddy field through suction filtration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103611366A CN102879229A (en) | 2012-09-17 | 2012-09-17 | Method for in situ measuring saturated solution nutrients of submersed paddy field through suction filtration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102879229A true CN102879229A (en) | 2013-01-16 |
Family
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|---|---|---|---|
| CN2012103611366A Pending CN102879229A (en) | 2012-09-17 | 2012-09-17 | Method for in situ measuring saturated solution nutrients of submersed paddy field through suction filtration method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808677A (en) * | 2014-02-14 | 2014-05-21 | 中国科学院亚热带农业生态研究所 | Method for detecting saturation capacity of available phosphorus in paddy soil |
| CN105784966A (en) * | 2016-02-25 | 2016-07-20 | 四川省农业科学院土壤肥料研究所 | Method for detecting nutrients of paddy field flooding solution |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62113040A (en) * | 1985-11-12 | 1987-05-23 | Taisei Corp | Method and apparatus for sampling concrete kneading water |
| CN1821741A (en) * | 2006-03-08 | 2006-08-23 | 中国科学院南京土壤研究所 | In-site continuous sampling device for water soluble organic pollutant |
| CN102243146A (en) * | 2011-04-19 | 2011-11-16 | 中国科学院南京土壤研究所 | Multi-layer water storage type columnar soil leakage water collector |
-
2012
- 2012-09-17 CN CN2012103611366A patent/CN102879229A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62113040A (en) * | 1985-11-12 | 1987-05-23 | Taisei Corp | Method and apparatus for sampling concrete kneading water |
| CN1821741A (en) * | 2006-03-08 | 2006-08-23 | 中国科学院南京土壤研究所 | In-site continuous sampling device for water soluble organic pollutant |
| CN102243146A (en) * | 2011-04-19 | 2011-11-16 | 中国科学院南京土壤研究所 | Multi-layer water storage type columnar soil leakage water collector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808677A (en) * | 2014-02-14 | 2014-05-21 | 中国科学院亚热带农业生态研究所 | Method for detecting saturation capacity of available phosphorus in paddy soil |
| CN103808677B (en) * | 2014-02-14 | 2016-04-27 | 中国科学院亚热带农业生态研究所 | A kind of assay method of paddy soil available phosphorus saturated capacity |
| CN105784966A (en) * | 2016-02-25 | 2016-07-20 | 四川省农业科学院土壤肥料研究所 | Method for detecting nutrients of paddy field flooding solution |
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Application publication date: 20130116 |