ẢNH HƯỞNG CỦA MẬT ĐỘ TRỒNG VÀ PHÂN BÓN ĐẾN KHẢ NĂNG SINH TRƯỞNG, PHÁT TRIỂN VÀ NĂNG SUẤT CÂY HOA HƯỚNG DƯƠNG TẠI TỈNH THỪA THIÊN HUẾ

Sunflowers are one of the flowers chosen by many localities to grow because they both create beautiful landscapes and also a source raw materials for oil from seeds. This study aims determine planting density amount fertilizers being suitable growing, well-developed, high-yielding in Thua Thien Hue province. Research results shown that fertilization did not significantly affect germination rate growth time sunflower winter crop season. The number green leaves on plant, diameter calyx, flower, durability flowers. At level 90 kg N + 60 P2O5 K2O per hectare had highest numbers plant flower diameter, were highest. Planting an interaction yield. largest stem was at 50.000 plants/ha 80 hectare. treatment with 62.500 90kg height, leaf area actual