在黔西北高海拔生态区对黔苦3号苦荞进行不同播种期试验研究,结果表明:以4月4日播种的单位面积籽粒产量最高,为3 336.67 kg/hm2,随着播种期后延,产量逐渐降低;不同播种期间的株高、茎节数、单株粒重、千粒重不同。适期播种,不但可提高黔苦3号苦荞产量,而且对增加其株高、节数、单株粒重、千粒重有积极促进作用。黔苦3号的适宜播期为4月4日到4月19日。 In the high altitude ecological zone of northwestern Guizhou, different planting periods of bitter buckwheat of Guizhou Bitui No.3 were studied. The results showed that the grain yield per unit area sown to April 4 was the highest (3 336.67 kg / hm2) , And the yield decreased gradually. The plant height, number of stems, grain weight per plant and thousand-grain weight were different during different sowing times. Appropriate sowing, not only can improve the yield of bitter buckwheat 3 bitter, but also to increase their plant height, number of sections, grain weight per plant, 1000 grain weight has a positive role in promoting. Guizhou bitter on the 3rd suitable sowing date April 4 to April 19.