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Application of akadama soil, method for removing phosphorus in farmland ditch, and plant cultivation matrix

A technology of red jade soil and ditches, applied in the field of agriculture, achieves the effects of wonderful ideas, pollution improvement and scientific design

Inactive Publication Date: 2020-07-03
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to provide red jade soil as the application of the matrix dam matrix for phosphorus removal in farmland ditches, and solve the problem that there is no matrix dam matrix specifically for intercepting granular phosphorus in the prior art

Method used

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  • Application of akadama soil, method for removing phosphorus in farmland ditch, and plant cultivation matrix
  • Application of akadama soil, method for removing phosphorus in farmland ditch, and plant cultivation matrix
  • Application of akadama soil, method for removing phosphorus in farmland ditch, and plant cultivation matrix

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Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides matrix screening experiments, specifically:

[0036] According to the literature review and comparison of some substrates with adsorption properties for phosphorus, and referring to their market prices, this study initially selected common and economical clinoptilolite, ceramsite, steel slag and red jade soil as the fillers used in the experiment and screened them . Before carrying out the experiment, soak the four fillers in clear water that has been tested to contain no phosphorus, and clean them up. Then put fillers with the same particle size and mass into perforated PVC pipes, and inject artificial water with a phosphorus concentration of 0.9-1 mg / L. Three repetitions were set up for each packing, and after standing for a period of time, the water samples filtered through the packing were taken to measure the concentration of TP, PP and DP, and the adsorption effects of various packings on TP and PP were analyzed, and the combination was s...

Embodiment 2

[0041] This embodiment provides the layout experiment of the matrix dam using red jade soil as the matrix, specifically:

[0042] The soil layer height of the ecological ditch is 10cm, and matrix dams with a height of 5cm, 10cm and 15cm are respectively set in the ditch, and the ecological ditch without filler is used as a blank control, see figure 2 . The influent water samples of the ditch are artificially distributed, and the influent flow rate is 5L / d. After the system is stabilized, the water inlet of the matrix ditch, the front end and the back end of each matrix barrier are collected respectively at 0h, 12h, 24h, 36h, 48h, and 60h. And 100ml of water samples from the outlet of the ditch, and 100ml of water samples from the water inlet and outlet of the control ditch, and the determination of granular phosphorus and total phosphorus, the results are shown in Table 2-4. Among them, in Table 2-4, section 1 is the soil layer water inlet of the ecological ditch; section 2 ...

Embodiment 3

[0052] This embodiment provides the matrix dam laying experiment that adopts red jade soil as matrix, compared with embodiment 2, the soil layer height of ecological ditch is 30cm in the present embodiment, and height is 15cm, 30cm and 45cm respectively in the ditch. Red jade soil matrix dam, other conditions are the same.

[0053] The results show that for the matrix dam with a height of 30cm, the removal rates of granular phosphorus and total phosphorus at 6 sections of the section are the highest at 0h, 12h, 24h, 36h, 48h, and 60h. That is, when the height of the matrix dam is consistent with the height of the soil layer of the ecological ditch, the removal rate of phosphorus is the best.

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Abstract

The invention discloses application of akadama soil as a phosphorus removal matrix dam matrix of a farmland ditch, a method for removing phosphorus in a farmland ditch, and a plant cultivation matrix,and solves the problem that no special matrix dam matrix for intercepting granular phosphorus exists in the prior art. According to the method for removing phosphorus in the farmland ditch, a matrixdam is built in a farmland ditch, and the matrix of the matrix dam is akadama soil. The plant cultivation matrix comprises akadama soil adsorbing phosphorus in a farmland ditch. According to the invention, the design is scientific, and the conception is wonderful; and phosphorus pollution in a farmland ditch is divided into dissolved phosphorus and granular phosphorus, so that a new thought is provided for treating pollution of the farmland ditch.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to the application of red jade soil, a method for removing phosphorus in farmland ditches and a plant cultivation substrate. Background technique [0002] Agricultural non-point source pollution mainly refers to the nutrient substances such as nitrogen and phosphorus and Other inorganic and organic pollutants enter nearby receiving water bodies (such as rivers, lakes, reservoirs, bays, etc.) through farmland surface runoff, farmland drainage and underground infiltration under the action of precipitation or runoff. [0003] According to my country's "First National Survey of Pollution Sources Bulletin" in 2010, total phosphorus (TP) from agricultural sources (excluding rural living sources) accounted for 67.3% of the total emissions, and the application of chemical fertilizers in planting industries is the main cause of phosphorus pollution. reason. Relevant statisti...

Claims

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Application Information

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IPC IPC(8): B09C1/00A01G24/10E02B13/00E02B3/10
CPCA01G24/10B09C1/00E02B3/10E02B13/00
Inventor 何燕周雪秋李春谢勇沈飞邓仕槐王莉淋张延宗张世熔罗玲刘燕
Owner SICHUAN AGRI UNIV
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