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种粒大小影响幼苗出苗和生长,种子大的幼苗干物重,生活力强,产量潜力高。据试验测定,小麦种子千粒重每增加10克,发芽率和出苗率分别提高8.05%和5.50%;千粒重为50克时,发芽率和出苗率分别为93.15%和88.50%。千粒重小于8.07克,就不具备发芽力和生命力。小麦种子粒重与种子胚根数目有关,大粒种胚根5～6条,中粒种4～5条,小粒种3～4条,线性回归是Y=2.48+0.07X,Y=0.80。一叶一心时,测定种子粒重与幼苗干重的关系是y=
The size of the seedling affects the emergence and growth of the seedling, and the dry seed weight of the seedling with large seed has strong vitality and high yield potential. According to the experiment, the germination rate and the emergence rate increased by 8.05% and 5.50% for every 10 g of 1000-grain weight of wheat seeds. The germination rate and the emergence rate were 93.15% and 88.50% respectively when the 1000-grain weight was 50g. Thousand grain weight less than 8.07 grams, do not have the germination and vitality. The grain weight of wheat was related to the number of radicle seeds. There were 5 to 6 embryo roots, 4 ~ 5 medium seeds and 3 ~ 4 small seeds in large seeds. The linear regression was Y = 2.48 + 0.07X and Y = 0.80. When a leaf one heart, the determination of seed weight and seedling dry weight relationship is y =