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   <subfield code="a">Đề tài “Ước tính sự phát thải khí CH₄  trong mùa khô ở vườn quốc gia U Minh Thượng, Kiên Giang” được thực hiện nhằm khảo sát lượng khí CH₄  phát thải của Vườn Quốc gia U Minh Thượng trong mùa khô và ảnh hưởng của các yếu tố lý, hóa nước, đất và mực nước đến sự phát thải CH₄ . Nghiên cứu được thực hiện từ tháng 3/2019 đến tháng 6/2019 với tần suất thu mẫu 2 tuần/lần. Kết quả nghiên cứu cho thấy nước trong khu vực vùng lõi VQG U Minh Thượng có pH &gt; 5, Eh thấp, hàm lượng oxy hòa tan trong nước thấp (trạng thái thiếu khí) và hàm lượng chất hữu cơ đang phân hủy lớn cho thấy nguồn nước bị ô nhiễm hữu cơ. Nước trong kênh có dấu hiệu nhiễm mặn vào mùa khô.</subfield>
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