丹玉13是丹东市农科所育成的多抗性玉米单交种,1986年已推广600万亩左右,遍及辽宁、河南、山东、河北、吉林、山西、四川等省。该品种的繁、制种产量较高。丹东市蚰岩县1983年制种4275亩,平均亩产176公斤;该县牧牛乡制神1400亩,平均亩产196.4公斤,其中有500亩平均亩产超过300公斤,高产地块亩产达366.7公斤。为了获得高产、优质的杂交种子,应做到以下几点: 1.选择安全隔离、中等以上肥、旱涝保收的 Dan Yu 13 is Dandong City, agricultural bred multi-resistant corn single cross, 1986 has been about 6 million mu spread throughout Liaoning, Henan, Shandong, Hebei, Jilin, Shanxi, Sichuan and other provinces. The varieties of the complex, higher seed production. In Danyang County, Dandong City, seed production was 4275 mu in 1983, with an average yield of 176 kg. The county has a mu area of ​​1400 mu and an average mu yield of 196.4 kilograms. Among them, 500 mu has an average mu yield of more than 300 kilograms, 366.7 kg. In order to obtain high yield, high quality hybrid seeds, should do the following: 1. Choose safe isolation, medium and above fertilizer, drought and salvage