NGHIÊN CỨU ẢNH HƯỞNG CỦA LIỀU LƯỢNG KALI VÀ THỜI VỤ GIEO CẤY ĐẾN SINH TRƯỞNG VÀ NĂNG SUẤT CỦA GIỐNG LÚA THUẦN THANH HƯƠNG TRONG VỤ XUÂN 2020 TẠI HUYỆN TRIỆU SƠN, TỈNH THANH HÓA

Abstract

The result of research shows that in the Spring crop, Thanh Huong rice variety was used at a rate of 90 - 110 kg K2O/ha on the basis of 10 tons of manure + 100 kg N + 90 kg P2O5 for 1 hectare, planting season 2 (January, 10) for maximum productivity and efficiency.
The maximum level of technical fertilizer in different growing seasons was 130 kg K2O/ha, the yield increased from 18.61 to 20.52 quintals/ha compared to no potassium fertilizer on 10 tons of manure + 100 kg. N + 90 kg P2O5. However, the optimal level of economic fertilizer was the highest fertilizer level of 90 - 110 kg K2O /ha for all 3 seasons, the yield of 1 kg K2O was from 16.65 - 18.75 kg of paddy/1kg K2O.
Keywords: Season, dose, growth, yieds.