NGHIÊN CỨU, THỬ NGHIỆM MỘT SỐ GIỐNG NGÔ NGẮN NGÀY CHỊU HẠN TẠI TỈNH LÀO CAI

In the northern mountainous region, corn is the most important food crops after rice and main food crops of many ethnic minorities such as H'mong, Dao,...In addition, corn feed is used efficiently even in smallholder and is becoming stronger commodity exchange. Therefore, maize is increasingly more important for farmers, especially farmers in the mountains. However, corn production in this area is impeded by natural conditions, economic - social households, they mainly cultivate on steep hills, poor soil and water due entirely to the sky so difficult farming. Also, people often grow maize in mountain farming methods, fertilizers and less investment in plant protection to low production efficiency. The study of selected short-corn varieties, drought tolerant and some measures of sustainable maize cultivation on sloping land in Laocai has helped people be more active in the arrangement of plant structure reasonable, the maize on slopes greater efficiency, more sustainable. After 2 years of the project has already chosen two maize variety are LCH9 and LVN61 and appropriate short-term drought on the plains and slopes in Laocai. Average corn yield increased from 1.07 to 1.18 tons/ha, equivalent to an increase from 15.1 to 17.0% over the B9698 control. Apply technical measures intercropping black bean and covered VA06 grass to plant material (7 tons/ha) for the highest economic efficiency (18.7 million VND/ha), compared with the control 8.1 million VND/ha. Soil erosion is significantly reduced when covering materials (down from 46.8 to 69.9% compared to control. In addition, chemical indicators of land are increased or decreased volatility is good for crops.