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Polder area three-stage wetland system coupling paddy field, pond and ditch

A technology for paddy fields and ditches, applied in rice cultivation, multi-stage water treatment, biological water/sewage treatment, etc., can solve the problems of ecological planting and single-cultivation mode, so as to reduce the use of chemical fertilizers and pesticides, increase prices, The effect of improving the quality of agricultural products

Inactive Publication Date: 2020-11-20
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on ecological farming mainly focuses on the single-culture model, and few studies have considered the two single-culture models and ditch wetlands.

Method used

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  • Polder area three-stage wetland system coupling paddy field, pond and ditch
  • Polder area three-stage wetland system coupling paddy field, pond and ditch
  • Polder area three-stage wetland system coupling paddy field, pond and ditch

Examples

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Effect test

Embodiment 1

[0028] As shown in the figure, a three-level wetland system coupled with ponds and ditches in a polder paddy field includes a first-level wetland ecosystem-pond, a second-level wetland ecosystem-paddy field, and a third-level wetland ecosystem-drainage. The specific steps are as follows:

[0029] (1) The domestic sewage in the village can be discharged into the ditches and ponds with the paddy field water after primary treatment in the septic tank. The nitrogen and phosphorus in the water will increase, and microbial phytase will be added to the water body to change the organic phosphorus in the polluted water body into inorganic phosphorus and dissolved oxygen. At this time, phosphorus is the nutrient substance of the water body, which breeds algae, aquatic plants, etc., and then puts silver carp and bighead carp that purify the water quality, and sand pond snakeheads with high economic value in the ditches and ponds, and turns N and P nutrients into ecological aquatic products...

Embodiment 2

[0081] Idle field shrimp farming mode, ideal water quality indicators for shrimp farming: transparency: 25-30cm, pH: 8.2-8.6, DO: not less than 0.4ug / L, total alkalinity: more than 120ug / L, ammonia nitrogen: less than 0.4mg / L , hydrogen sulfide: less than 0.01mg / L, nitrite: less than 0.05mg / L, total heterotrophic bacteria: 105-106 / ml water, total number of Vibrio: less than 1000 ml / l water, paddy field rectification, winter fallow field Choose concentrated contiguous fields or low-lying dual-use fields. After the late rice is harvested, return the rice stalks to the field, turn over the fields, reinforce and raise the ridges, plant aquatic plants, and choose Procambarus clarkii for shrimp seedlings.

[0082]Before stocking shrimp seedlings, set up anti-escape measures in the field, and remove miscellaneous fish and sundries in the field. After 3-4 days, the paddy field will be flooded with water, and the water level in the paddy field will reach 30-40cm. Quicklime, sprinkle t...

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Abstract

The invention provides a polder area three-stage wetland system coupling a paddy field, a pond and ditches, and relates to the field of polder area water pollution control. According to the invention,the concepts of ecology, environmental protection and the like are taken as concepts, a novel ecological agricultural garden is created, agricultural non-point source pollution is controlled, the useamount of chemical fertilizer is halved from the source, pesticide is reduced by about 1 / 3, and green pollution-free agricultural products are produced. In June to October, rice and ducks are cultivated together, and duck rice and ecological ducks are produced; and in November to May, water is added into the paddy field to change the paddy field into a fishpond, and ecological culturing of fishesand shrimps such as crawfishes and aristichthys nobilis is conducted. In winter-spring season, a lot of polder fields are changed into ponds, one-season planting is reduced, the use amount of chemical fertilizer and pesticide is reduced, meanwhile, the water environment capacity of polder areas surrounding the Chaohu Lake basin is increased, N and P in primary rainwater in spring are purified through polder wetland, the influence on Chaohu Lake water is greatly relieved, and more importantly, local farmers adjust the ecological planting industry, so that the quality of agricultural products is improved, and the income is increased.

Description

technical field [0001] The invention relates to the field of pollution prevention and control in polders, in particular to a three-stage wetland system for coupling ponds and ditches to paddy fields in polders. Background technique [0002] In recent years, there has been an outbreak of blue-green algae in Chaohu Lake, and the eutrophication of the water body is serious. The key to controlling the eutrophication of Chaohu Lake is to control the total amount of nutrient elements nitrogen and phosphorus entering the lake, especially to control the total amount of phosphorus entering the lake. According to research estimates, the phosphorus capacity of Chaohu Lake is 300-350 tons, but the total amount of phosphorus discharged into the lake every year reaches about 740 tons, far exceeding the environmental carrying capacity of Chaohu Lake. Analysis of the pollution structure in the Chaohu Lake Basin shows that after long-term treatment, industrial pollution has decreased year b...

Claims

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Application Information

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IPC IPC(8): A01K61/10A01K61/59A01K67/02A01G22/22A01G22/00A01G22/25A01G22/60A01G31/00A01G33/00C02F3/32
CPCA01G31/00A01G33/00A01K67/02A01K61/10A01K61/59A01G22/00A01G22/22A01G22/25A01G22/60C02F3/32C02F2301/08Y02P60/60Y02A40/81
Inventor 李玉成李永慧王宁张学胜黄巍余经纬刘春软
Owner ANHUI UNIVERSITY
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