Water-saving irrigation method capable of reducing greenhouse gas emission of rice field in cold area

A greenhouse gas and paddy field technology, applied in the field of agricultural technology and environmental protection, to achieve good greenhouse gas emission effects, reduce greenhouse gas emission effects, reduce field management labor costs and mechanical fuel usage costs

Inactive Publication Date: 2019-08-06
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Water-saving irrigation method capable of reducing greenhouse gas emission of rice field in cold area
  • Water-saving irrigation method capable of reducing greenhouse gas emission of rice field in cold area
  • Water-saving irrigation method capable of reducing greenhouse gas emission of rice field in cold area

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Effect test

Embodiment 2

[0036] Test 2: The treatment and test area of ​​the test in 2018 are the same as those in the test in 2017. Both water management modes of this technology treatment and conventional flooding treatment are adopted. See Table 1 for water management. The water and fertilization management methods of each treatment are the same as those in 2017. The rice variety tested was "Suijing 18", which was transplanted on May 21 and harvested on September 21.

[0037] The water consumption, CH 4 and N 2 O emission flux and the GWP produced by the two are compared.

[0038] In 2018, the difference in water consumption between the two treatments at the greening stage was small. Compared with the conventional irrigation treatment, this technology saved 43.63%, 34.24%, 32.44%, 38.25% and 21.49%. During the rice field period, the total water consumption of this technology is 558.8mm, and the total water consumption of conventional flood irrigation treatment is 848.2mm. The total water consum...

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Abstract

The invention discloses a water-saving irrigation method capable of reducing greenhouse gas emission of a rice field in a cold area and relates to the field of agricultural technologies and environment protection. According to the method, in all growth periods of rice, the root layer is irrigated with field water until the upper control limit of moisture is achieved, and after the rice field moisture reaches the lower control limit of moisture, irrigation is conducted to the upper limit of moisture again. It is proved through an experiment that compared with common basin irrigation on the ricefield, the water consumption of the method is reduced by about 290 millimeters, and the water-saving amplitude is increased by 35%. According to the method, the emission amount of N2O of the rice field is increased, but the emission amount of CH4 is greatly reduced, and compared with common basin irrigation, the GWP generated by the N2O and the CH4 is reduced by 34.25-46.12%.

Description

technical field [0001] The invention relates to the fields of agricultural technology and environmental protection, in particular to an irrigation method that saves rice irrigation water in actual production and simultaneously reduces greenhouse gas emissions from paddy fields. Background technique [0002] Methane (CH 4 ) and nitrous oxide (N 2 O) As the main greenhouse gas emitted by farmland soil, it has an important impact on global climate change. The Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) pointed out that CH 4 and N 2 The global warming potential (GWP) of O is respectively CO 2 21 times and 310 times. In 2010, agricultural non-CO 2 Greenhouse gas emissions are about 5.2-5.8Gt CO 2 -eq, paddy field as agricultural CH 4 and N 2 The main emission source of O, its non-CO 2 Greenhouse gas emissions are about 493-723Mt CO2-eq, accounting for 9%-11% of total agricultural emissions. [0003] CH emissions from paddy fields 4 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22
CPCA01G22/22Y02P60/22
Inventor 张忠学聂堂哲齐智娟陈鹏赵健姜丽莉杨桦郑恩楠姜浩陈帅宏
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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