QUY TRÌNH TƯỚI TIÊU KHOA HỌC CHO LÚA, GIẢM PHÁT THẢI KHÍ NHÀ KÍNH (CH4, N2O) VÙNG ĐỒNG BẰNG SÔNG HỒNG=QUY TRÌNH TƯỚI TIÊU KHOA HỌC CHO LÚA, GIẢM PHÁT THẢI KHÍ NHÀ KÍNH (CH4, N2O) VÙNG ĐỒNG BẰNG SÔNG HỒNG

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Tác giả: Lê Xuân Quang

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Thủy lợi, 2018

Mô tả vật lý: tr.60

Bộ sưu tập: Metadata

ID: 498168

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Quy trình tưới tiêu khoa học cho lúa, tiết kiệm nước, giảm phát thải khí nhà kính theo kinh nghiệm từ Nhật Bản là kết quả nghiên cứu từ đề tài hợp tác quốc tế theo nghị định thư với Nhật Bản, đề tài được nghiên cứu thử nghiệm trong 6 vụ (2015÷2017) tại xã Phú Thịnh, huyện Kim Động, tỉnh Hưng Yên theo 3 công thức tưới: công thức tưới khô kiệt (giai đoạn rút nước khi mực nước ruộng ở mức -15 cm so với mặt ruộng mới tưới lại), công thức tưới khô vừa (giai đoạn rút nước khi mực nước ruộng ở mức -5 cm so với mặt ruộng mới tưới lại) và công thức tưới truyền thống có tổng diện tích khu thí nghiệm 50,2 ha. Kết quả cho lượng nước tưới trung bình của khô kiệt bằng 65,7% và khô vừa và bằng 74,2% so với khu truyền thống. Khu khô vừa cho năng suất cao nhất 7,60 tấn/ha. Lượng phát thải khí nhà kính trong 3 năm công thức tưới khô kiệt thấp nhất, tiết kiệm được 35,47% và công thức tưới khô vừa giảm được 30,21% so với công thức tưới truyền thống
lượng phát thải khí CH4 vụ Mùa gấp từ 1,97 đến 7,13 lần vụ xuân. Từ kết quả nghiên cứu, đề tài đề xuất quy trình tưới tiêu khoa học cho lúa áp dụng cho vùng ĐBSH là kết hợp giữa công thức tưới khô vừa và khô kiệt (giai đoạn rút nước khi mực nước ruộng ở mức -10 cm so với mặt ruộng thì mới tưới lại)
quy trình có tổng lượng nước tưới vụ Xuân từ 3100÷3900 m3/ha
vụ Mùa từ 2500÷3400 m3/ha.The process of scientific irrigation for rice, water saving, and greenhouse gas emission reduction according to the experience of Japan is the result of research on the international cooperation project under the Protocol with Japan. The subject was tested in 6 crops (2015 ÷ 2017) in Phu Thinh commune, Kim Dong district, Hung Yen province by 3 irrigation formulas: Strong dry irrigation formula (drainage stage when the water level is -15 cm compared to the newly irrigated field surface), weak dry irrigation formula (drainage period when the water level is -5 cm compared to the newly irrigated field surface) and traditional irrigation formula with a total area of 50.2 hectares . As a result, the average irrigation water volume of the strong dry plot was 65.7% and the weak dry plot was 74.2% compared to the traditional one. The weak dry area gives the highest yield of 7.60 tons/ha. The greenhouse gas emission in the three years, strong dry irrigation formula was the lowest , saved 35.47% and the weak dry irrigation formula has reduced 30.21% compared to the traditional irrigation formula
the CH4 emission of the crop is from 1.97 to 7.13 times higher than that of the spring crop. From the research results, the proposed method of irrigation for rice applied to the Red River Delta is the combination of the weak dry irrigation formula and strong dry irrigation formula (drainage period when the water level is -10 cm compared to the field surface that to be re-irrigated)
The process has total spring irrigation water from 3100 ÷ 3900 m3/ha
the autumn - summer crop is from 2500 ÷ 3400 m3/ha.

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