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1 选择好制种基地。我县地处半山区,气候复杂,温差较大,全县4～9月份有效积温为2300～2800℃。制吉单159从出苗到成熟128天,制种时必须要选择无霜期135天以上,积温在2800℃左右地区才能满足吉单159制种的生育条件。还要选择土壤肥力好,土质疏松的缓坡地块,而且四周隔离300m以上集中连片的地块进行制种,便于管理和技术指导。 2 种子处理。播种前将精选的种子进行包衣处理,未经包衣处理的种子要选择子粒饱满、无霉变、无异形粒的种子置于太阳下翻晒2天,这样即可杀死种子表面的病菌又可以提高种子的发芽率和发芽势,以提高出苗率。
1 Choose a good breeding base. My county is located in the Mid-Levels area, the climate is complex, the temperature difference is larger, the county from April to September effective accumulated temperature of 2300 ~ 2800 ℃. Ji Jidan 159 from emergence to maturity 128 days, seed production must choose frost-free period of 135 days or more, accumulated temperature around 2800 ℃ in order to meet the Yidan 159 seed production conditions. Also choose a good soil fertility, loose gentle land plots, but also around more than 300m contiguous plots for seed production, easy management and technical guidance. 2 seed treatment. Before sowing, the selected seeds are coated, unsealed seeds are selected to be full of seeds, mold-free and non-alien seeds are placed in the sun for 2 days to kill the germs on the surface of the seeds But also can improve the seed germination rate and germination potential, in order to improve the emergence rate.