施氮浓度对汕优63籽粒性状及粒重的影响  

EFFECTS OF N SUPPLYING CONCENTRATION ON GRAIN CHARACTERS AND GRAIN WEIGHT OF SHANYOU 63

作　　者：杨连新[1] 王余龙[1] 董桂春[1] 黄建晔[1] 姚友礼[1] 单玉华[1] 周晓东 

机构地区：[1]扬州大学农业部作物栽培与生理重点开放实验室,江苏扬州225009

出　　处：《江苏农业研究》2001年第2期24-28,共5页

基　　金：江苏省自然科学基金资助项目 (BJ990 3 8)

摘　　要：在水稻水培条件下于移栽至抽穗期 ,设计 8种施氮浓度 (0～ 4 9mg/kg) ,研究其对汕优 63谷壳大小、谷粒充实程度及粒重的影响。结果表明 :1处理间粒重极差达 4 .72 mg。与对照相比 ,降低施氮浓度有利于提高粒重 ,施氮浓度过高 ,粒重显著下降。 2降低施氮浓度能显著增加谷壳的长度、宽度及面积 ,增加施氮浓度可提高饱粒的充实程度。 3从谷壳大小及谷粒充实度来看 ,处理间粒重的差异主要是由谷壳大小所造成。 4不同施氮浓度条件下 ,谷壳宽度的变异大于谷壳长度 。The experiments were carried out under hydroponical cultural condition with hybrid rice Shanyou 63. Influence of N supplying concentration from transplanting to heading on grain characters and grain weight were analysed. The results were as follow: ① The grain weight in different treatments ranged at 4.72 mg. Compared with CK, reducing the N supplying concentration would result in higher grain weight. While raising the N supplying concentration would result in lower grain weight. ② Compared with CK, reducing the N supplying concentration would result in increment of hull length, hull width and its area. While raising the N supplying concentration would result in higher grain plumpness. ③ The variation of grain weight between different treatments was essentially determined by hull size. ④ The variation of hull width was bigger than hull length under different N supplying concentration. Hull size was essentially determined by hull width.

关 键 词：施氮浓度 谷壳 谷粒充实度 粒重 汕优63水稻 

分 类 号：S511[农业科学—作物学] S143.1