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dong xiao mai chun ji fen lei tian guan ji shu
Author(s): 
Pages: 15
Year: Issue:  5
Journal: Rural Science & Technology

Abstract: 冬小麦由于播种时间、播种量、出苗情况不同,导致冬前田间长势和群体结构不同.不同苗情在春季返青后状况不同,田间管理措施也应有所不同. 一、田间苗情分类 壮苗田:每667米2冬前总茎数70万~80万茎,主茎和大分蘖明显、粗壮、叶色深绿,单株分蘖2~3个,单株次生根5~7条. 一般苗情田:每667米2总茎数60万~70万茎,单株分蘖1~2个,单株次生根3~5条.弱苗田:每667米2总茎数40万~50万茎,叶色发黄,叶片窄短,单株基本无分蘖、无次生根.
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