Ảnh hưởng của biochar và phân hữu cơ kết hợp với phân hóa học lên một số đặc tính sinh học, hóa học đất trong mô hình chuyên lúa vụ Đông Xuân tại huyện Trần Đề, Sóc Trăng

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Tác giả: Thị Minh Diệu Bùi, Thị Mỹ Tiên Cao, Thị Xuân Đỗ, Tarao Mitsunori, Phạm Anh Thi Nguyễn, Phúc Tuyên Nguyễn, Thị Kim Ba Phan, Sỹ Nam Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 338.16 Production efficiency

Thông tin xuất bản: Khoa học (Đại học Cần Thơ), 2021

Mô tả vật lý: 191-199

Bộ sưu tập: Metadata

ID: 498269

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Chủ đề

Nghiên cứu được thực hiện với mục tiêu đánh giá ảnh hưởng của vật liệu hữu cơ lên quần thể vi sinh vật, sự phát thải khí methane và một số đặc tính dinh dưỡng đất theo giai đoạn sinh trưởng của cây lúa tại huyện Trần Đề. Thí nghiệm được bố trí khối hoàn toàn ngẫu nhiên với ba nghiệm thức (NT) (n=3). Kết quả thí nghiệm cho thấy NT2-Biochar hoặc NT3-bổ sung phân gà (PHC) giúp gia tăng mật số nấm tổng số, vi khuẩn tổng số, nhóm vi khuẩn phân hủy cellulose, cố định đạm, hòa tan lân cao hơn so với NT1-khuyến cáo (KC). Hàm lượng chất hữu cơ, P dễ tiêu, Pts trong đất ở NT2-Biochar đạt cao hơn so với các NT còn lại. Tổng lượng khí CH4 phát thải từ NT2-Biochar đạt thấp hơn so với các NT còn lại. Tuy nhiên năng suất lúa của các NT khác biệt không có ý nghĩa thống kê. Kết quả của nghiên cứu cho thấy việc bổ sung biochar hoặc phân gà kết hợp với phân vô cơ theo khuyến cáo giúp gia tăng quần thể vi sinh vật có lợi, giúp cải thiện một số tính chất đất trồng lúa chuyên canh và bổ sung biochar giúp giảm lượng khí CH4 phát thải trong vụ Đông Xuân 2018- 2019.The field study is am at evaluating the effects of organic matter amendments on soil biological and chemical parameters during the rice plant growth at Tran De district, Soc Trang province. The field experiment was set up as a randomized complete block design with three treatments (NT) (n=3). The results showed that treatments applied by either NT2-Biochar or NT3- chicken maure (PHC) in combination with the inorganic fertilizers increased significantly the densities of the culturable fungi and bacteria as well as nitrogen fixing bacteria, phosphorus solubilizing bacteria, cellulolytic bacteria compared to those of the NT1-inorganic fertilizer regime (KC). In addition, NT2-Biochar increased soil total organic matter, P availability and total phosphorus. The total amount of CH4 gaseous emission from the NT2-Biochar was the least and was significantly different compared to that of the other treatments. However, rice yields did not differ among treatments. The results showed that the application of organic matters together with inorganic fertilizers helped increasing beneficial functional bacterial groups and some soil chemical parametersand biochar amendment mitigated CH4 emission in the rice monoculture system in winter-spring crop of the year 2018-2019.

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