LỰA CHỌN THỜI VỤ CHO GIỐNG LÚA NẾP CẨM KHẨU XIÊN PĂN TẠI HUYỆN BẢO LÂM, TỈNH CAO BẰNG

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Tác giả: Thị Hòa Hà, Văn Tâm Nguyễn, Thị Ngọc Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2023

Mô tả vật lý: tr.29-36

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ID: 339897

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Khau Xien Pan Purple sticky rice is a specialty glutinous rice variety of Bao Lam district, Cao Bang province. In order to improve productivity and economic efficiency and contribute to the expansion of this rice variety, we conducted an experiment with 03 sowing/transplanting times. CT1: Sowing on May 19, 2022, transplanting when the seedling is 40 days old
CT2: Sowing on May 29, 2022, transplanting when the seedling is 30 days old
CT3: Sowing on 04/06/2022 transplanted when the seedling is 25 days old. The experiment was laid out in a complete randomized block design with 3 replicates. The results showed that the growth time decreased gradually at the late sowing time
tillering ability is not high in all sowing/transplanting times. Plant height, percentage of firm seeds and 1000-seed weight were not clearly affected by sowing/transplanting times. Effective branching and effective tillering rate, effective number of panicles/m2, number of firm seeds/head, theoretical yield, and actual yield in the CT2 time frame were significantly highest compared with the 2 time frames CT1 and CT3. The CT2 seasonality frame has the same pest and disease resistance as the CT1 time frame and is better than the CT3 cropping time frame. The best time frame with Khau Xien Pan Purple sticky rice is CT2 Sowing on May 29, 2022, transplanting at 30 days old, the yielded 5.46 tons/ha.Nếp cẩm Khẩu Xiên Păn là giống lúa nếp đặc sản của huyện Bảo Lâm, tỉnh Cao Bằng. Để nâng cao năng suất, hiệu quả kinh tế góp phần mở rộng diện tích giống lúa này, chúng tôi tiến hành thí nghiệm với 03 khung thời vụ. CT1: Gieo mạ ngày 19/05/2022 cấy khi mạ 40 ngày tuổi
CT2: Gieo mạ ngày 29/05/2022 cấy khi mạ 30 ngày tuổi
CT3: Gieo mạ ngày 04/06/2022 cấy khi mạ 25 ngày tuổi. Thí nghiệm được bố trí theo khối ngẫn nhiên hoàn chỉnh với 3 lần nhắc lại. Kết quả nghiên cứu cho thấy, thời gian sinh trưởng giảm dần ở thời vụ gieo mạ muộn
khả năng đẻ nhánh không cao ở tất cả các khung thời vụ. Chiều cao cây, tỉ lệ hạt chắc và khối lượng 1000 hạt không chịu sự ảnh hưởng rõ ràng của thời vụ. Nhánh hữu hiệu và tỉ lệ đẻ nhánh hữu hiệu, số bông hữu hiệu/m2, số hạt chắc/bông, năng suất lý thuyết, năng suất thực thu ở khung thời vụ CT2 cao nhất một cách có ý nghĩa so với 2 khung thời vụ còn lại. Khung thời vụ CT2 cho khả năng chống chịu sâu bệnh, chống đổ tương đương thời vụ CT1 và tốt hơn ở khung thời vụ CT3. Khung thời vụ tốt nhất với lúa nếp cẩm Khẩu Xiên Păn: Gieo mạ ngày 29/05/2022 cấy khi mạ 30 ngày tuổi cho năng suất thực thu 5,46 tấn/ha.

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