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zen yang suo duan shui dao ji cha yang miao fan qing qi
Author(s): 
Pages: 40-41
Year: Issue:  6
Journal: Farm Machinery

Keyword:  返青期水稻机插秧机插水稻播种密度叶龄水稻秧苗叶期拉伤送嫁肥抗逆性;
Abstract: <正>1.机插秧返青期长的原因⑴因机插水稻适宜移栽的秧龄为15~20天。此时,叶龄基本处于四叶期,刚刚进入自养阶段,根源基发育数目相对较少,加上播种密度高,根系盘结紧密,机插时根系易拉伤,受伤的根系需要几天时间生长恢复,机插后秧苗抗逆性比常规手插秧弱,因此与常规手插秧苗和抛秧相比,机插秧的返青期相对长些,一般为3~5天,而且在机插后3~5天内基本上无生长量。
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