为了找出野生小麦产生的根源，丰润县老庄子农技站进行了广泛调查，发现同一份种子种在连茬（＿年小麦玉米两茬）地块混杂较重；种在倒茬（小麦前茬为春玉米花生）地块混杂较轻；种在场地混杂严重；种在两年以上未种过小麦的地块则基本无混杂现象。他们认为：新引进小麦的混杂 In order to find out the root causes of wild wheat, Fengrun County Lao Zhuangzi agricultural station conducted extensive investigations and found that the same seed in the continuous crop (wheat and corn in two years) plots mixed heavier; planted in the stubble (wheat stubble For the spring corn peanut) plots mixed light; planted in the site mixed seriously; planted in more than two years without wheat planted plots are basically no mixed phenomenon. They think: the new introduction of wheat mixed