tailieunhanh - Sản xuất thử giống ngô lai LVN66 cho Tây Nguyên và Duyên hải Nam Trung Bộ năm 2011-2012

Bài viết đề cập nghiên cứu sản xuất thử giống ngô lai LVN66 cho Tây Nguyên và Duyên hải Nam Trung Bộ năm 2011-2012, trong vòng 2 năm, dự án đã hoàn thành tất cả các nội dung được giao, bao gồm: Hoàn thành 2 quy trình sản xuất hạt giống lai F1 của LVN66 cho Cao nguyên Tây Nguyên và Trung tâm ven biển miền Nam. Do đó, một số kỹ thuật đã được cung cấp cho các quy trình này như sau: Cao nguyên Tây Nguyên hạt giống lai F1 có thể được sản xuất trong cả hai mùa đông xuân và mùa hè. | Hội thảo Quốc gia về Khoa học Cây trồng lần thứ nhất SẢN XUẤT THỬ GIỐNG NGÔ LAI LVN66 CHO TÂY NGUYÊN VÀ DUYÊN HẢI NAM TRUNG BỘ NĂM 2011 - 2012 ThS. Đào Ngọc Ánh Viện Nghiên cứu Ngô SUMMARY Production of the maize hybrid LVN66 for Tay Nguyen Plateau and Southern Coastal Center, 2011 - 2012 Within 2 years, the project has completed all assigned contents, including: - Completed 2 procedures for producing F1 hybrid seed of LVN66 for Tay Nguyen Plateau and Southern Coastal Center. By that, some techniques have been supplied for these procedures as follow: For Tay Nguyen Plateau: F1 hybrid seed could be produced in both Winter Spring and Summer Autumn seasons. In Winter Spring season, it was recommended to sow the parental seeds in the rate of 1:5, the density of 13 thousand male plants and 63 thousand female plants, the space of 60 x 22cm. In Summer Autumn season, it was suggested to sow the parental seeds by the rate of 1:4 or 1:5 and highly recommended the rate of 1:4 (or 15 thousand male plants and 61 thousand female plants) for suffician male anthors to guarantee the yield of over ton/ha of F1 hybrid seed. For Southern Coastal Center: It was highly recommend to produce F1 hybrid seed of LVN66 in Winter Spring season and produce less in Summer Autumn season. In Winter Spring season, the rate of parental seed should be 1:5, the density of 13 thousand male plants and 63 thousand female plants per hectare, and the space of 60 x 22cm. In Summer Autumn season, it was recommended to produce F1 seed in necessary situation, for that, the rate of parental seed should be 1:4, and the space of 60 x 22cm. - Completed 2 procedures for producing comercial seed of LVN66 for Tay Nguyen Plateau and Southern Coastal Center. Some techniques have been supplied for these procedures as follow: The sowing time should be from 15 November -15 December of the previous year, and 15 March -20 April (when it rained stably). The density was recommended for two regions and two seasons of 71 -