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大豆不同品种对赛克津的耐药性不同,合丰25号最敏感,其原因何在?我们进行了田间观察和室内试验,发现合丰25种子拱土出苗与一般品种大豆不同。一般大豆出土时都是钩头出土,并且两片子叶紧闭,出土后子叶逐渐上扬而张开。而合丰25则不同,在下胚轴伸长同时子叶也逐渐上扬,当下胚轴伸长到3～3.5厘米时,子叶达最大上扬角度,在120～135度,同时两片子叶张开,角度为15～30度。如果大豆播深为4～5厘米,在继续出土
Different varieties of soybean resistant to metribuzin, Hefei 25 is the most sensitive, the reason? We conducted field observations and laboratory tests found that Hefeng 25 seed arching and general varieties of soybean is different. General unearthed soybeans are unearthed, and two cotyledons closed, cotyledons gradually rose after the unearthed and open. While Hefeng 25 is different, while the hypocotyl elongation cotyledons also gradually rose, when the hypocotyl extended to 3 to 3.5 cm, the cotyledons up to the maximum angle of 120 to 135 degrees, while two leaves open, the angle For 15 ~ 30 degrees. If the soybean sowing depth of 4 to 5 cm, continue to unearthed