ẢNH HƯỞNG CỦA LƯỢNG PHÂN HỮU CƠ VI SINH ĐẾN SINH TRƯỞNG, NĂNG SUẤT VÀ CHẤT LƯỢNG GIỐNG CÀ RỐT VỤ ĐÔNG XUÂN TẠI VÙNG ĐẤT CÁT VEN BIỂN TỈNH THANH HOÁ

Abstract

The experiment was conducted during the Winter-Spring season to assess the effectiveness of Song Gianh microbial organic fertilizer on carrot cultivation in Thanh Hoa province. The experiment consisted of two factors: two carrot varieties (VL444F1 and TN391) and six application doses of Song Gianh microbial organic fertilizer (0; 0.5; 1.0; 1.5; 2.0; and 2.5 tons/ha). Results showed that the application of 2.0 to 2.5 tons of microbial organic fertilizer per hectare resulted in the highest carrot yields. Actual yields reached 27.4 to 27.5 tons/ha for variety VL444F1 and 24.5 to 24.6 tons/ha for variety TN391.
Furthermore, the results indicate that for variety VL444F1, the technical optimum level of microbial organic fertilizer application is 2.43 tons/ha, with an economic optimum level of 2.22 tons/ha. For variety TN391, the technical optimum amount of fertilizer is 1.93 tons/ha, with an economic optimum level of 1.74 tons/ha.