CORRELATION BETWEEN ROOT DEVELOPMENT AND RICE GROWTH (KD18) UNDER THE INFLUENCE OF DIFFERENT IRRIGATION REGIMES

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Đại học Thái Nguyên, 2020

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Nghiên cứu sự sinh trưởng và phát triển của cây lúa dưới tác động của các chế độ nước khác nhau được bố trí trong điều kiện nhà kính tại trường Đại học Nông Lâm - Đại học Thái Nguyên. Thí nghiệm được thực hiện trên giống lúa Khang dân 18 (KD18) với 5 công thức tưới nước khác nhau, trong đó có công thức ngập nước trong suốt quá trình canh tác (CT1)
các công thức ướt khô xen kẽ 4 (CT2), 8 (CT3), 12 (CT4) và 16 ngày (CT5). Kết quả trên cho thấy chế độ tưới nước ảnh hưởng rõ rệt đến sinh trưởng của cây lúa như số nhánh, chiều cao cây, khối lượng thân, lá, rễ. Sự sinh trưởng của lúa tốt nhất ở chế độ nước ngập khô xen kẽ 4 ngày cao hơn các công thức ngập khô xen kẽ dài ngày từ 24,2 - 36,9%. Các yếu tố sinh trưởng như khối lượng thân lá có mối quan hệ chặt với các chỉ tiêu rễ ở giai đoạn đẻ nhánh, chín sáp và chín hoàn toàn. Các chỉ tiêu về rễ có mối tương quan thuận chặt với chỉ tiêu sinh trưởng thân, lá ở giai đoạn trỗ, chín sáp. Số lượng rễ càng nhiều, khối lượng rễ càng lớn thì khối lượng lá, khối lượng thân, khối lượng chất khô tổng số của cây lúa càng cao với độ tin cậy có ý nghĩa ở mức 95% trở lên (P, Tóm tắt tiếng anh, Study on growth and development of rice under the influence of different irrigation regimes arranged in greenhouse conditions at Thai Nguyen University of Agriculture and Forestry. The experiment was conducted on Khang Dan 18 rice variety with 5 different irrigation treatments, including flooded treatment during cultivation (F1)
alternate between dry and wet every 4 days (F2), 8 days (F3), 12 days (F4) and 16 days (F5). The results show that the irrigating regime significantly affects the growth of rice such as number of branches, plant height, dry mass, leaves and roots. The best growth of rice is at the 4-day alternating between dry and wet, which has 24.2 - 36.9% higher growth rate than the other treatments. Growth factors, such as leaf stem weight, are strongly correlated with root parameters at tillering, dough and maturity. The root parameters are positively correlated with the growth of stems and leaves in the flowering and maturing stage. The higher number of roots significantly leads to the larger root mass, leaf, stem, and total dry matter weight with a confidence level of 95% or more (P

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