杂交中稻库源结构对弱势粒灌浆结实的影响  

Effects of Sink-source Structures on Filling of Superior and Inferior Spikelets of Mid-season Hybrid Rice

作　　者：徐富贤[1] 郭晓艺[1] 张林[1] 熊洪[1] 朱永川[1] 刘茂[1] 周兴兵[1] 

机构地区：[1]四川省农业科学院水稻高粱研究所,四川泸州646000

出　　处：《中国农业科技导报》2013年第1期96-101,共6页Journal of Agricultural Science and Technology

基　　金：国家粮食科技丰产科技工程项目(2011BAD16BO5-1);西南水稻创新体系建设项目;四川省学术带头人培养基金;四川省水稻育种攻关项目;四川省财政推广项目资助

摘　　要：以杂交中稻组合G46A/10制12和内香6A/10制5为材料,在两种施氮水平下,研究了库源调节对杂交中稻强、弱势粒的影响。结果表明,强势粒灌溉起动较快,粒重进入缓慢增长期拐点比弱势粒早10～15 d。强势粒与弱势粒的灌浆速率差异不显著,过多施用氮肥不利于籽粒灌浆结实。"源"供应不足是弱势粒充实率低的主要原因,增加"源"的供应量,弱势粒可以达到或超过正常生长植株强势粒的充实率水平。Taking G46A/10 Zhi 12 and Neixiang 6A/10 Zhi 5 of mid-season hybrid rice combinations grown under 2 levels of nitrogen application as experimental material, this paper studied the effects of sink-source structures on the filling of superior and inferior spikelets. The results indicated that superior spikelets filled fast, and grain weight entered the slow increasing into growth period 10 - 15 days earlier than that of inferior spikelets. There were no of superior spike lets significant differences in filling rate between superior spikelets and inferior spikelets. Excessive nitrogen fertilizer application was not conducive to grain filling. ＂Source＂ shortage is the main reason for poor grain filling of inferior spikelets. The filling rate of inferior spikelets can reach or exceed the superior spikelets of the normal growth plants in filling rate, if the supply quantity of ＂source＂ is increased to a certain degree.

关 键 词：杂交中稻 库源结构 强势粒 弱势粒 充实率 

分 类 号：S511[农业科学—作物学]