CN209803134U - Simulation measuring device for litter decomposition-soil nutrient return quantity - Google Patents
Simulation measuring device for litter decomposition-soil nutrient return quantity Download PDFInfo
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- CN209803134U CN209803134U CN201920575942.0U CN201920575942U CN209803134U CN 209803134 U CN209803134 U CN 209803134U CN 201920575942 U CN201920575942 U CN 201920575942U CN 209803134 U CN209803134 U CN 209803134U
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Abstract
The utility model discloses a thing decomposition that withers and falls-soil nutrient return volume analogue measurement device relates to experimental apparatus technical field, include: the device comprises a transparent soil column pipe, a circular litter decomposition bag and a humidity sensor, wherein a mesh base is arranged at the bottom of the transparent soil column pipe, the humidity sensor is arranged on the inner wall of the transparent soil column pipe, a storage battery, a controller and a display screen are arranged on the outer wall of the transparent soil column pipe, and the circular litter decomposition bag is placed above a sandy soil layer; a litter decomposes-soil nutrient returns volume analogue measurement device simple structure, the defect that exists to prior art provides one kind can be regularly to the sandy soil in the earth pillar carry out the litter of its nutrient accumulation volume of sampling analysis and accumulation speed decompose-soil nutrient returns volume analogue measurement device.
Description
Technical Field
The utility model belongs to the technical field of experimental apparatus technique and specifically relates to a thing decomposition that withers and falls-soil nutrient return volume analogue measurement device that returns is related to.
Background
At present, the decomposition experiment of the forest and grassland litter is generally carried out by adopting a mesh bag method, wherein the mesh bag is generally 20-25cm multiplied by 20-25cm square, a certain amount of litter samples are firstly decomposed in the mesh bag, and then the mesh bag is placed in a natural environment for decomposition. And when the nutrient return amount is calculated, the weight of the sample in the decomposition bag is taken back and weighed periodically, then the nutrient content is determined by crushing, and the total nutrient return amount is calculated according to the content of nutrient substances and the decomposition amount. This practice reflects an idealized and theoretical result. However, practically all of the nutrients lost by decomposition do not go into the soil altogether. During the decomposition of the litters, part of organic carbon is discharged to the atmosphere in the form of gas through the respiration of microorganisms, and part of nutrient substances are absorbed and utilized by the microorganisms or lost in the gas state. Therefore, the structure obtained by the traditional calculation method has certain deviation with the nutrient content actually obtained by the soil.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a litter decomposes-soil nutrient return volume analogue measurement device provides one kind to the defect that prior art exists and can regularly carry out the litter that its nutrient accumulation volume of sampling assay and accumulation rate to the sand in the earth pillar and decompose-soil nutrient return volume analogue measurement device.
In order to achieve the above object, the utility model provides a following technical scheme: a simulation survey device of litter decomposition-soil nutrient return amount comprises: transparent soil pillar pipe, circular thing that withers and falls decomposes bag and humidity transducer, transparent soil pillar socle portion is equipped with the mesh base, the lower sand of nutrient content forms husky soil layer of transparent soil pillar intraductal packing into, humidity transducer installs and lies in down 10cm apart from husky soil layer upper surface on the inner wall of transparent soil pillar pipe, battery, controller and display screen are installed to transparent soil pillar outer wall, humidity transducer connects gradually battery, controller and display screen, the diameter of circular thing that withers and falls decomposes the bag is less than the internal diameter of transparent soil pillar pipe, circular thing that withers and falls decomposes the bag and places husky soil layer's top.
preferably, the simulation determination device for litter decomposition-soil nutrient return amount provided by the embodiment of the utility model has the inner diameter of the transparent soil column tube of 15-20cm, the length of the transparent soil column tube of 50-80cm, and the thickness of the transparent soil column tube of 3 mm;
Preferably, in the device for simulating and measuring litter decomposition-soil nutrient return amount provided by the embodiment of the present invention, the thickness of the sandy soil layer is greater than half of the tube length of the transparent soil pillar tube;
Preferably, according to the analog measuring device for litter decomposition-soil nutrient return amount provided by the embodiment of the utility model, the aperture of the circular litter decomposition bag is 20-40 meshes, and the thickness of the circular litter decomposition bag is 5 mm;
Preferably, in the device for simulating and measuring litter decomposition-soil nutrient return amount provided by the embodiment of the present invention, the sandy soil with lower nutrient content is flowing dune sandy soil or fine river sandy soil;
Preferably, the embodiment of the utility model provides a litter decomposes-soil nutrient return volume analogue measurement device, transparent soil pillar pipe is the PVC material or the glass material.
Compared with the prior art, the utility model has the advantages of it is as follows showing:
(1) the utility model discloses the flexibility is strong in the place selection, is convenient for develop the experiment, can control soil moisture, according to the control nature experimental design simulation precipitation input humidity change control, the low simulation natural environment hydrothermal condition of at utmost.
(2) the utility model discloses a carry out periodic layering sampling test to the sandy soil in the earth pillar body, master soil nutrient substance content dynamic change to calculate nutrient substance speed of returning.
(3) The utility model discloses an accumulation speed of nutrient substance in the soil, the thing that reacts out to wither and fall is actually to soil nutrient return efficiency.
(4) The utility model discloses no longer at every turn carry out pure back test nutrient content to thing that withers and falls, can continue to survey decomposition rate behind the weight of thing that withers and falls in the periodic test decomposition bag, practice thrift the test cost.
(5) The utility model discloses a transparent PVC pipe can observe the infiltration degree of depth of water in the earth pillar body, and nimble control moisture is too much and outwards runs off from the bottom.
Drawings
Fig. 1 is a schematic structural diagram of a litter decomposition-soil nutrient return amount simulation measuring device provided by an embodiment of the present invention;
Fig. 2 is an experimental operation diagram of the litter decomposition-soil nutrient return amount simulation determination device provided by the embodiment of the utility model.
Detailed Description
In the following, the technical solutions of the embodiments of the present invention are described clearly and completely with reference to the drawings in the present application, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
For the convenience of understanding and explanation, a litter decomposition-soil nutrient return amount simulation measuring device according to an embodiment of the present invention will be described in detail below.
As shown in fig. 1, a simulated measurement device for litter decomposition-soil nutrient return amount comprises: the soil-water separation device comprises a transparent soil column pipe, a circular litter decomposition bag and a humidity sensor, wherein the diameter of the inside of the transparent soil column pipe is 15-20cm, the pipe length of the transparent soil column pipe is 50-80cm, the pipe wall thickness of the transparent soil column pipe is 3mm, a mesh base is arranged at the bottom of the transparent soil column pipe, and the mesh base can ensure that soil and ground in the soil column pipe can exchange water vapor and heat. And filling sandy soil with lower nutrient content into the transparent soil column pipe to form a sandy soil layer, wherein the sandy soil with lower nutrient content is moving dune sandy soil or fine river sandy soil. Humidity transducer installs and is being located down 10cm apart from sand bed upper surface on the inner wall of transparent soil column pipe, the thickness on sand bed is greater than half of the tube length of transparent soil column pipe, transparent soil column pipe outer wall installation battery, controller and display screen, humidity transducer connects gradually battery, controller and display screen, humidity transducer detects the humidity on sand bed in real time and shows on the display screen, the diameter of circular litter decomposition bag is less than the internal diameter of transparent soil column pipe, circular litter decomposition bag is placed transparent soil column inside is located the position of the top on sand bed, the aperture of circular litter decomposition bag is 20-40 mesh, according to the difference of decomposition thing, can freely adjust the aperture. The thickness of circular litter decomposition bag is 5mm, transparent soil pillar pipe is PVC material or glass material.
A litter decomposition-soil nutrient return amount simulation and determination device comprises the following detection steps:
the method comprises the following steps: and filling flowing sand dune sandy soil or fine river sandy soil with low nutrient content into the transparent soil column tube to form an artificial soil column body.
Step two: then the litters are put into the round litters decomposing bag, the dropped litters are covered above the artificial soil column body and are in full contact with the surface of sandy soil, and the whole device is placed in an environment required by an experiment.
Step three: when raining, the transparent soil column pipe is shielded from rain, so that rainwater leaching interference is prevented; if the atmospheric temperature change is simulated, a shelter is not needed above the transparent soil column tube, and normal solar radiation is obtained. If the temperature is required to be increased, a temperature increasing device can be arranged above the transparent soil column tube, and if the temperature is reduced, shielding treatment is carried out above the transparent soil column tube. The watering simulation is carried out according to the preset simulated rainfall, the infiltration depth of water in sandy soil can be observed through the transparent pipe, the water quantity is controlled according to the infiltration depth, the water is prevented from flowing out from the bottom, and the nutrient loss in the soil is prevented.
Step four: the contents of nutrient substances such as organic matters, nitrogen, phosphorus, potassium and the like can be regularly sampled and tested for sandy soil in the soil column, and the nutrient accumulation amount and the accumulation rate of the sandy soil are analyzed through continuous sampling tests for several times. Meanwhile, drying and weighing litter in the decomposition bag, calculating decomposition amount and decomposition rate, and flexibly controlling test frequency.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the embodiments, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a litter decomposes-soil nutrient return volume simulation survey device which characterized in that includes: transparent soil pillar pipe, circular thing that withers and falls decomposes bag and humidity transducer, transparent soil pillar socle portion is equipped with the mesh base, the lower sand of nutrient content forms husky soil layer of transparent soil pillar intraductal packing into, humidity transducer installs and lies in down 10cm apart from husky soil layer upper surface on the inner wall of transparent soil pillar pipe, battery, controller and display screen are installed to transparent soil pillar outer wall, humidity transducer connects gradually battery, controller and display screen, the diameter of circular thing that withers and falls decomposes the bag is less than the internal diameter of transparent soil pillar pipe, circular thing that withers and falls decomposes the bag and places husky soil layer's top.
2. A litter decomposition-soil nutrient return simulation measuring device as claimed in claim 1, wherein the diameter of the transparent soil column tube is 15-20cm, the length of the transparent soil column tube is 50-80cm, and the thickness of the transparent soil column tube is 3 mm.
3. A litter decomposition-soil nutrient return simulation assay device as claimed in claim 2, wherein the thickness of said sand layer is greater than half of the tube length of said transparent soil pillar tube.
4. a litter decomposition-soil nutrient return simulation measuring device as claimed in claim 1, wherein the aperture of the round litter decomposition bag is 20-40 mesh, and the thickness of the round litter decomposition bag is 5 mm.
5. a litter decomposition-soil nutrient return simulation measuring device as claimed in claim 1, wherein said sand soil with low nutrient content is a floating sand dune sand soil or a fine river sand soil.
6. The litter decomposition-soil nutrient return amount simulation and determination device of claim 1, wherein the transparent soil pillar tube is made of PVC material or glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920575942.0U CN209803134U (en) | 2019-04-24 | 2019-04-24 | Simulation measuring device for litter decomposition-soil nutrient return quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920575942.0U CN209803134U (en) | 2019-04-24 | 2019-04-24 | Simulation measuring device for litter decomposition-soil nutrient return quantity |
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| Publication Number | Publication Date |
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| CN209803134U true CN209803134U (en) | 2019-12-17 |
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| CN201920575942.0U Expired - Fee Related CN209803134U (en) | 2019-04-24 | 2019-04-24 | Simulation measuring device for litter decomposition-soil nutrient return quantity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210079036A (en) * | 2019-12-19 | 2021-06-29 | 사단법인대기환경모델링센터 | Outdoor sampling littercase apparatus for controlling migrations of soil fauna |
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2019
- 2019-04-24 CN CN201920575942.0U patent/CN209803134U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210079036A (en) * | 2019-12-19 | 2021-06-29 | 사단법인대기환경모델링센터 | Outdoor sampling littercase apparatus for controlling migrations of soil fauna |
| KR102328645B1 (en) * | 2019-12-19 | 2021-11-24 | 사단법인대기환경모델링센터 | Outdoor sampling littercase apparatus for controlling migrations of soil fauna |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20200424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |