作物学报 ›› 2014, Vol. 40 ›› Issue (10): 1819-1829.doi: 10.3724/SP.J.1006.2014.01819
韦还和1,李超1,张洪程1,*,孙玉海1,孟天瑶1,杨筠文2,马荣荣3,王晓燕4,戴其根1,霍中洋1,许 轲1,魏海燕1
WEI Huan-He1,LI Chao1,ZHANG Hong-Cheng1,*,SUN Yu-Hai1,MENG Tian-Yao1,YANG Jun-Wen2,MA Rong-Rong3,WANG Xiao-Yan4,DAI Qi-Gen1,HUO Zhong-Yang1,XU Ke1,WEI Hai-Yan1
摘要:
以籼粳交超级稻甬优12为试材,四叶一心期带蘖小苗移栽,通过栽培措施的调控,形成超高产( >13.0 t hm-2)和高产( >12.0 t hm-2)群体,以高产群体作为对照,对分蘖挂牌追踪,比较研究超高产群体分蘖发生成穗特点。结果表明,超高产群体分蘖产量及对总产量的贡献率分别为11.53 t hm-2和87.77%,高产群体分别为10.59 t hm-2和87.40%。超高产和高产群体的分蘖利用都以一次和二次分蘖为主,一次和二次分蘖的产量均以超高产高于高产群体,超高产群体一次分蘖产量的贡献率略低于高产群体,二次分蘖产量的贡献率高于高产群体。超高产群体一次分蘖发生在第1至第9叶位,第4至第7叶位是分蘖发生与成穗的优势叶位,二次分蘖以1/3、2/3、3/3、2/4、1/5蘖位优势较强。对于高产群体而言,一次分蘖以第4至第7叶位分蘖优势较强,二次分蘖以1/3、2/3、3/3优势较强,三次分蘖发生叶位数明显高于超高产群体,但成穗率较低。超高产群体成穗分蘖的穗长、单穗重、总粒数、着[1]粒密度的平均值高于高产群体,结实率却略低于高产群体。
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