CN204177787U - A kind of in-site detecting device for potted plant soil ammonia volatilization - Google Patents
A kind of in-site detecting device for potted plant soil ammonia volatilization Download PDFInfo
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- CN204177787U CN204177787U CN201420592276.9U CN201420592276U CN204177787U CN 204177787 U CN204177787 U CN 204177787U CN 201420592276 U CN201420592276 U CN 201420592276U CN 204177787 U CN204177787 U CN 204177787U
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- potted plant
- ammonia volatilization
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Abstract
The utility model discloses a kind of in-site detecting device for potted plant soil ammonia volatilization, comprise vent hood, described vent hood is cylindric upper and lower opening formula structure, described vent hood top arranges rain-proof cover support, inside rain-proof cover support, draw-in groove is set, described vent hood inside arranges bearing support, and top arranges rain-proof cover, described rain-proof cover and rain-proof cover support snap-fit engagement.The utility model is by being set to special size by vent hood, be applicable to the in-site detecting of potted plant soil ammonia volatilization, the structure of bearing support is set in vent hood, make the regular placement in use ensureing sponge, ensure that measurement result, vent hood top arranges rain-proof cover, avoids the impact of rainfall on measurement result.The utility model structure is simple, and cost of manufacture is cheap, and measurement result is accurate.
Description
Technical field
The utility model belongs to ammonia volatilization sensing equipment technical field, is specifically related to a kind of structure simply for the in-site detecting device of potted plant soil ammonia volatilization.
Background technology
In agricultural production, using of nitrogenous fertilizer greatly improves crop yield, but along with the increase of nitrogen fertilizer amount, many environment and ecological problem also highlight day by day.The nitrogenous fertilizer be manured into soil, except part absorbed by crops, also can enter deep soil with the leaching of precipitation and irrigation water, or through ammonia volatilization and denitrification, enter air with the form of ammonia and oxides of nitrogen.Wherein, ammonia volatilization is the key factor of nitrogenous fertilizer gaseous loss.After ammonia volatilization enters air, although farmland and natural ecosystems can be reentered with precipitation or dried wet deposition, but due to the sub-fraction only accounting for earth surface of ploughing, the ammonia major part be present in air will enter forest, grassland, rivers, lake etc., the nitrogen content of natural soils and water body is caused to raise, thus produce a series of ecological problem such as body eutrophication, soil acidification, floristics can be caused further to substitute and Some Species extinction.Therefore, the research about farmland ammonia volatilization is an important content in farmland ecosystem in Nutrient Cycling research always, and the mensuration of ammonia volatilization is then prerequisite and the basis of farmland ammonia volatilization research.
At present, the method measuring soil ammonia volatilization mainly contains indirectly and direct two classes.The former mainly refers to soil balancing method, is estimated the volatile quantity of ammonia by rate of fertilizer application, plant absorption amount, soil residual quantity and Leaching loss, and many owing to measuring project, do not consider denitrification, error is larger; The venting method that the latter has airtight method, microclimate method, Wind tunnel and occurred in recent years.Sampling determination minute air flow and the Wind tunnel air directly above examination district, accuracy is high, but requires comparatively great Shi district area.The examination district area of micrometeorology method can not be less than 1hm
2, and around field can not use chemical fertilizer; Though the area that Wind tunnel requires can at 1hm
2below, but also can not be very little.Therefore, these two kinds of methods are applicable to the gas-dynamic research in large-scale ecological region more.For the field plot trial of multifactor contrast, owing to flowing back and forth in the top, An Shi district of volatilizing from different districts, micrometeorology method is difficult to distinguish its source.Micrometeorology method and Wind tunnel also require that the ammonia density in the Instrument measuring wind speed of high precision and sensitivity, temperature and air changes, and testing expenses are large.The ammonia acquisition equipment structure of airtight method is simple, and the ammonia that Direct Acquisition volatilizees from soil surface, is usually used in plot experiment, but the ammonia volatilization process under air-tight state is different from state of nature completely.
The venting method ammonia acquisition equipment occurred in recent years is only made up of the sponge of a rigid plastic of polyvinyl chloride pipe and the dipped phosphoglycerol solution of two panels, and structure is simple.In process of the test can soil surface in assurance device through the air circulation of sponge and external environment.Meanwhile, lower floor sponge is used for absorbing the ammonia of soil volatilization, and upper strata sponge absorbs the ammonia in air, and prevents in its access to plant and absorbed by lower floor sponge.Compared with other assay method, venting method overcomes air-locked shortcoming inside and outside conventional containment method acquisition equipment, compared with minute air flow, Wind tunnel, do not need again the monitoring instrument of high precision, easy to operation, the recovery is up to 99.51%, and the coefficient of variation is only 0.77%.Its recovery is not only significantly higher than airtight method, also apparently higher than Wind tunnel.The comparison test in field also shows, the measurement result of venting method is consistent with current generally accepted micrometeorology method.But, although venting method ammonia acquisition equipment has above-mentioned advantage, but there is following problem in actual applications: 1. existing venting method device volume is excessive, and in research of agricultural science, often there is the way adopting pot experiment, pot experiment is the plant culture test utilizing various special basin alms bowl to carry out, specification due to basin alms bowl is not often very large, and the soil erosion in basin alms bowl except plant often fails to lay down existing venting method device; 2. in existing venting method device, the sponge of the dipped phosphoglycerol solution of two panels is positioned in device by experience, and this just often makes the sponge of placement deep mixed, and affects the stability of measurement result.Therefore, above-mentioned Problems existing have impact on the application of existing venting method device in pot experiment research.For this reason, developing a kind of in-site detecting device for potted plant soil ammonia volatilization is the key point solved the problem.
Utility model content
The purpose of this utility model is to provide a kind of structure simply for the in-site detecting device of potted plant soil ammonia volatilization.
The object of utility model realizes like this, comprise vent hood, described vent hood is cylindric upper and lower opening formula structure, described vent hood top arranges rain-proof cover support, inside rain-proof cover support, draw-in groove is set, described vent hood inside arranges bearing support, and top arranges rain-proof cover, described rain-proof cover and rain-proof cover support snap-fit engagement.
The utility model is by being set to special size by vent hood, be applicable to the in-site detecting of potted plant soil ammonia volatilization, the structure of bearing support is set in vent hood, make the regular placement in use ensureing sponge, ensure that measurement result, vent hood top arranges rain-proof cover, avoids the impact of rainfall on measurement result.The utility model structure is simple, and cost of manufacture is cheap, and measurement result is accurate.
Accompanying drawing explanation
Fig. 1 is one-piece construction partial schematic sectional view of the present utility model;
Fig. 2 is that the AA of Fig. 1 is to schematic diagram;
In figure: 1-vent hood, 2-rain-proof cover support, 3-bearing support, 4-rain-proof cover, 5-bleeder vent.
Embodiment
Be further described the utility model below in conjunction with accompanying drawing, but must not be limited the utility model by any way, any change done based on the utility model training centre or improvement, all belong to protection domain of the present utility model.
As shown in accompanying drawing 1 ~ 2, the utility model comprises vent hood 1, described vent hood 1 is cylindric upper and lower opening formula structure, described vent hood 1 top arranges rain-proof cover support 2, inside rain-proof cover support 2, draw-in groove is set, described vent hood 1 inside arranges bearing support 3, and top arranges rain-proof cover 4, described rain-proof cover 4 and rain-proof cover support 2 snap-fit engagement.
Described bearing support 3 is arranged at vent hood 1 apart from bottom 2/3 place.
Described bearing support 3 is arranged for " well " character form structure is parallel to surface level.
Described vent hood 1 inside diameter is 8 ~ 12cm, is highly 13 ~ 18cm, and wall thickness is 1 ~ 3cm.
Described rain-proof cover 4 diameter is greater than vent hood 1 outer dia.
Described vent hood 1 upper edge is provided with bleeder vent 5.
the course of work of the present utility model:
Adopt pot experiment, each basin alms bowl soil ammonia volatilization measures mode: by phosphoglycerol in the leaching of two pieces of uniform sponges of thickness (thickness is approximately 2cm) before using, wherein one piece of sponge is layed on the bearing support in device, another block sponge cover is located at vent hood top, apart from the lower floor sponge 1 ~ 2cm be layed on bearing support.On the same day be trapped in after fertilising of soil volatilization ammonia, each basin alms bowl cigarette strain outer fix, places this device upper respectively, samples during 8:00 in morning next day.During sampling, the sponge of air-breather lower floor is taken out, is respectively charged in polybag by community rapidly, sealing; Change the sponge of the firm dipped phosphoglycerol of another block simultaneously.The sponge on upper strata looks its dry wet situation and changes 1 time for 3 ~ 7 days.The sponge taken off is taken back testing laboratory, measures the ammonia wherein absorbed.Sample period is sampling in every 2 days 1 time, until cigarette strain is gathered.The ammonia volatilization speed of field soil is calculated by following formula:
In formula, M is the ammonia amount (NH that venting method or airtight method single assembly on average record at every turn
3-N, mg); A is the cross-sectional area (m of acquisition equipment
2); D is the time (d) of at every turn catching continuously.Prove through test: adopt the ammonia volatilization determinator after this improvement to be that science is reliable to monitor the ammonia volatilization of potted plant soil.
Claims (6)
1. the in-site detecting device for potted plant soil ammonia volatilization, comprise vent hood (1), it is characterized in that described vent hood (1) is for cylindric upper and lower opening formula structure, described vent hood (1) top arranges rain-proof cover support (2), rain-proof cover support (2) inner side arranges draw-in groove, described vent hood (1) inside arranges bearing support (3), and top arranges rain-proof cover (4), described rain-proof cover (4) and rain-proof cover support (2) snap-fit engagement.
2. the in-site detecting device for potted plant soil ammonia volatilization according to claim 1, is characterized in that described bearing support (3) is arranged at vent hood (1) distance bottom 2/3 place.
3. the in-site detecting device for potted plant soil ammonia volatilization according to claim 1 and 2, is characterized in that described bearing support (3) is arranged for " well " character form structure is parallel to surface level.
4. the in-site detecting device for potted plant soil ammonia volatilization according to claim 1, it is characterized in that described vent hood (1) inside diameter is 8 ~ 12cm, be highly 13 ~ 18cm, wall thickness is 1 ~ 3cm.
5. the in-site detecting device for potted plant soil ammonia volatilization according to claim 1, is characterized in that described rain-proof cover (4) diameter is greater than vent hood (1) outer dia.
6. the in-site detecting device for potted plant soil ammonia volatilization according to claim 1, is characterized in that described vent hood (1) upper edge is provided with bleeder vent (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592276.9U CN204177787U (en) | 2014-10-14 | 2014-10-14 | A kind of in-site detecting device for potted plant soil ammonia volatilization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420592276.9U CN204177787U (en) | 2014-10-14 | 2014-10-14 | A kind of in-site detecting device for potted plant soil ammonia volatilization |
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| CN204177787U true CN204177787U (en) | 2015-02-25 |
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| CN201420592276.9U Active CN204177787U (en) | 2014-10-14 | 2014-10-14 | A kind of in-site detecting device for potted plant soil ammonia volatilization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018670A (en) * | 2016-07-01 | 2016-10-12 | 甘肃省农业科学院土壤肥料与节水农业研究所 | Field in-situ monitoring method of ammonia volatilization from farmland soils |
| CN112697541A (en) * | 2021-02-04 | 2021-04-23 | 甘肃农业大学 | Soil ammonia volatilization and collection device suitable for irrigating farmland |
-
2014
- 2014-10-14 CN CN201420592276.9U patent/CN204177787U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018670A (en) * | 2016-07-01 | 2016-10-12 | 甘肃省农业科学院土壤肥料与节水农业研究所 | Field in-situ monitoring method of ammonia volatilization from farmland soils |
| CN112697541A (en) * | 2021-02-04 | 2021-04-23 | 甘肃农业大学 | Soil ammonia volatilization and collection device suitable for irrigating farmland |
| CN112697541B (en) * | 2021-02-04 | 2023-08-29 | 甘肃农业大学 | Soil ammonia volatilization collection device suitable for irrigating farmland |
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