抑制无效分蘖对水稻产量和非结构性碳水化合物的影响  

Effects of physical restriction to ineffective tiller on non-structuralcarbohydrates accumulation and yields of rice

作　　者：潘圣刚[1,2] 吴颖仪[1] 肖瑶[1] 陈燕红[1] 田华[1,2] 肖立中[1,2] 唐湘如[1,2] 

机构地区：[1]华南农业大学农学院,广东广州510642 [2]农业部华南地区作物栽培科学观测实验站,广东广州510642

出　　处：《湖南农业大学学报（自然科学版）》2015年第3期229-233,共5页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：广东省科技计划项目(2004B20101007);教育部新教师基金项目(20124404120009)

摘　　要：分别以培杂泰丰和粤晶丝苗为材料,采用水培方法,通过设计不同的栽插孔穴直径(栽插孔径分别为20、28、35 mm,依次记为D1、D2、D3)限制水稻的无效分蘖,研究抑制无效分蘖对不同基因型水稻的产量和非结构性碳水化合物的影响。结果表明:与D1、D3相比,D2显著提高了水稻培杂泰丰和粤晶丝苗的成穗率和每穗总粒数,最终显著增加了水稻产量;D2、D3处理水稻茎鞘非结构性碳水化合物含量显著高于D1处理,D3处理水稻培杂泰丰和粤晶丝苗抽穗后叶面积大,茎鞘非结构性碳含量高,但主要供给营养器官,对产量贡献少;水稻培杂泰丰和粤晶丝苗幼穗分化期的茎鞘非结构性碳水化合物含量与每穗总粒数呈显著正相关关系。Effects of physical restriction to ineffective tiller on non-structural-carbohydrates accumulation（NSC） and yields were studied by a pot experiment with water culture based on two rice cultivars, Peizataifeng and Yuejingsimiao. Physical restriction were conducted by designing different transplanting holes, they were 20 mm, 28 mm and 35 mm, denoted as D1, D2 and D3, respectively. Compared to D1 and D3, percentage of valid panicle, total grain number per panicle and yields of Peizataifeng and Yuejingsimiao from D1 were significantly increased. NSC in stem and sheath from D2 and D3 were remarkably higher than those of D1. The larger leaf area and NSC in stem and sheath of Peizataifeng and Yuejingsimiao were from D3. However, the higher NSC in stem and sheath of Peizataifeng and Yuejingsimiao were mainly transferred to vegetative organ, instead of to yield formation. And there was also significantly positive correlation between total grain number per panicle and NSC in stem and sheath at panicle initiation stage of Peizataifeng and Yuejingsimiao.

关 键 词：水稻 无效分蘖 产量 非结构性碳水化合物 物理限制 

分 类 号：S511.044[农业科学—作物学]