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   <subfield code="a">Đề tài &quot;Nghiên cứu ảnh hưởng của chất điều hòa sinh trưởng thực vật Brassinolide đến khả năng chịu mặn của lúa cao sản&quot; được thực hiện nhằm: (i) Xác định ảnh hưởng của chất điều hòa sinh trưởng thực vật brassinolide đến một số đặc tính sinh lý – sinh hóa của cây lúa cao sản khi bị mặn; (ii) Tìm ra nồng độ brassinolide xử lý cho cây lúa bị mặn ở những giai đoạn sinh trưởng của lúa (mạ, đẻ nhánh, tượng đòng và trổ) và mức độ mặn khác nhau. Đề tài đã thực hiện 12 thí nghiệm (2 thí nghiệm trong phòng, 8 thí nghiệm trong nhà lưới, 2 thí nghiệm ngoài đồng ruộng được thực hiện tại tỉnh Bạc Liêu) với 2 nội dung chính bao gồm (i) nghiên cứu một số đặc tính sinh lý sinh hóa của cây lúa cao sản khi bị mặn dưới tác động của brassinolide; (ii) nghiên cứu xử lý chất điều hòa sinh trưởng thực vật brassinolide khi lúa bị mặn ở từng giai đoạn sinh trưởng khác nhau trong điều kiện nhà lưới, sau đó ứng dụng kết quả vào sản xuất thực tiễn đồng ruộng. Trong đó, brassinolide xử lý ở các thí nghiệm trong phòng và nhà lưới gồm có các mức nồng độ là 0; 0,05; 0,10; 0,20; 0,40 mg/L với các nồng độ mặn nghiên cứu gồm 3‰ và 6‰. Thời gian thực hiện các thí nghiệm của luận án từ năm 2015 đến năm 2018.</subfield>
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