暖冬条件下密度和氮肥对淮北地区小麦群体质量及产量的影响

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试验于2004年10月至2006年6月在安徽省宿州职业技术学院农场进行,以小麦品种烟农19为试验材料,设置播种密度和施氮量两因素四水平15个处理。试验过程中,在2004年遭逢暖冬天气,故本试验中将暖冬和非暖冬(2005)与两试验因素一并考虑,共同考察对小麦群体质量和产量的影响。试验结果表明,暖冬造成小麦冬前旺长、生育进程提前,冻害加重;春后群体茎蘖数偏大、无效分蘖退化慢,茎蘖成穗率低;后期群体衰退加快,生育期缩短,产量降低、倒伏等不良影响。文中提出一定的预防方案,以助于小麦在
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