NGHIÊN CỨU TUYỂN CHỌN VÀ CÁC BIỆN PHÁP CANH TÁC CHO GIỐNG LÚA DT57 NĂNG SUẤT CAO CHỐNG CHỊU BỆNH BẠC LÁ Ở BẮC GIANG

Bac Giang province has the largest rice cultivation area of the Northern Midland and mountainous areas, with average yield of 45-50 ta/ha. The objective of this study is to increase rice yield through comparison survey between DT57 and some other rice varieties sown in Bac Giang. The results show the selected DT57 variety performed high yield and resistance to bacterial leaf blight and suitably grown in the soil degradation in Bac Giang province. The actual yield of this variety is 64.8 ta/ha in spring season crop, 62.1 ta/ha in summer Crop and higher than 15% to compare with the controlled variety Khang Dan 18 (actual yield 5.7 ta/ha/spring crop, and 54.0 ta/ha/summer crop, respectively). We have established the process of cultivated method for DT57 which has attained high yield by 64.8 to 71.4 ta/ha. The optimum sowing in spring crop for DT57 should be from 25/1, and summer crop is from 15/6, the density growing is 35-40 bunch/m2. The applied organic fertilizer for 1 ha is 2 tons, 120 kg N, 116 kg K2O, and 80kg P2O, respectively.