NGHIÊN CỨU ẢNH HƯỞNG CỦA MẬT ĐỘ CẤY ỴÀ LIỀU LƯỢNG ĐẠM ĐẾN SINH TRƯỞNG, PHÁT TRIỂN VÀ NĂNG SUẤT GIỐNG LÚA HƯƠNG THANH 8 TRỒNG TẠI HUYỆN ĐÔNG SƠN, TỈNH THANH HÓA

Abstract

An experiment to evaluate the effect o f increased plant density and nitrogen fertilizer dose on growth and yield o f rice variety Huong Thanh 8 in Dong Tien commune, Dong Son district, Thanh Hoa province. The experiment was arranged in a Split-plot design, 3 replications, the treatments include three treatments o f densities (Ml: 35 clusters/m2, M2: 45 clusters/m2, M3: 55 clusters/m2); and four treatments o f nitrogen fertilizer dosage levels (NO: 0 kg N/ha, N l: 80 kg N/ha, N2: 100 kg N/ha, N3: 120 kg N/ha). The results o f our study showed that the index growth and yield of rice variety Huong Thanh 8 tended to increase as the density decreased, and applied nitrogen from 0 kg to 100 kg N/ha as the same, however the index of growth and yield tended to decrease at 120 kg N/ha. The interaction o f density and nitrogen dosage showed that rice variety Huong Thanh 8 reach to the highest real yield of treatment of M2N2 was 7,65 tons/ha, and treatment ofM2N3 obtain 6.84 tons/ha. In contrast, the treatment of MINO and MINI had the lowest real yield o f 4,89 tons/ha and 5,07 tons/ha.
Keywords: Density, nitrogen fertilizer, yield, rice variety Huong Thanh 8, Dong Son district, Thanh Hoa province.