在谷子良种种植过程中,会逐渐退化混杂,丧失良种在经济上的有益性状,缩短良种在生产上的使用年限。因此,在推广优良品种的同时应重视其繁殖工作。谷子良种的提纯复壮繁种技术如下:1.留种田的选择。谷子不宜重茬,重茬谷田的病害严重,特别是白发病、黑穗病和线虫病,再者是杂草多,特别是谷莠子。重茬地做留种田不仅 In the process of planting elm seeds, they will gradually degenerate and mix, lose their good economic traits, and shorten their productive life. Therefore, in promoting the fine varieties should pay attention to its breeding work. Regeneration of millet seeds of seed breeding techniques are as follows: 1 stay farming options. Millet should not be stubble, stubble stubble serious disease, especially white hair disease, smut and nematode, but also weeds and more, especially the valley-shaped child. Stubble field to stay farming not only