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1 晒种晒种可在小麦播前4～5天进行,选择晴好天气,将种子薄薄地摊在晒场上,连续晒2～3天,温度低时可多晒1～2天。晒种能促进种子的后熟作用,既可增强种皮的透性和淀粉酶的活性,使淀粉分解为可溶性糖,用来供给胚呼吸和形成幼根、幼芽的新细胞,同时又能降低水分,使种子干燥一致,播种后吸水均匀,出苗齐,据试验证明,晒种可提高种子发芽率5%和发芽势10%左右。晒种时要注意三点:(1)尽量不要在水泥场地上晒种,以防温度过高使种子丧失发芽能力;(2)要经常翻动种子,促
1 sunburn sunburn in the wheat before sowing 4 to 5 days, select the fine weather, the seeds spread thinly in the drying field, continuous drying 2 to 3 days, the temperature can be low for more than 1 to 2 days. Sun species can promote seed ripening effect, can enhance the permeability of seed coat and amylase activity, the starch is decomposed into soluble sugar, used to supply embryonic respiration and the formation of young roots, buds of new cells, while Reduce water, make the seeds dry and consistent, absorb water evenly after sowing, emerge Qi, according to the experiment proves that the seed germination can improve seed germination rate of 5% and germination potential of about 10%. Should pay attention to three kinds of basking: (1) try not to bask in the cement field in order to prevent the temperature is too high to lose seed germination ability; (2) to often turn the seeds and promote