不同水稻品种(系)抗倒伏能力与茎秆形态性状的关系  

Relationship between lodging resistance and stem morphological traits in different rice varieties(lines)

作　　者：杨艳华[1] 朱镇[1] 张亚东[1] 陈涛[1] 赵庆勇[1] 周丽慧[1] 姚姝[1] 张颖慧[1] 董少玲[1] 王才林[1] 

机构地区：[1]江苏省农业科学院粮食作物研究所,江苏省优质水稻工程技术研究中心,国家水稻改良中心南京分中心,江苏南京210014

出　　处：《江苏农业学报》2011年第2期231-235,共5页Jiangsu Journal of Agricultural Sciences

基　　金：国家科技支撑计划项目(2006BAD01A01-5);农业部超级稻新品种选育与示范项目(2910505);农业部跨越计划项目(跨2008-10);江苏省农科院博士后基金和江苏省农业科技自主创新基金[CX(09)634]

摘　　要：分析水稻株高、基部节间形态性状等水稻茎秆的物理性状,以阐明决定水稻倒伏的主要因素。以抗倒伏品种南粳44和武运粳7号与不抗倒伏品系宁7412为试验材料,通过氮钾肥配比试验,探明株高、基部节间形态性状与抗倒性的关系。结果显示:水稻倒伏指数与基部节间长度呈显著正相关,与基部节间的粗度、壁厚和截面积呈显著负相关;水稻的抗倒伏能力存在着品种间差异;增施氮、钾肥对水稻倒伏有显著影响。表明水稻基部节间的长度、粗度、壁厚和截面积对品种抗倒伏能力影响较大,这些性状的优化组合是提高水稻品种抗倒伏能力的关键。To clarify the main factors affecting rice lodging,the physical traits of rice stem such as plant height and basal stem morphological traits were analyzed.Three cultivated varieties of Oryza sativa ssp.japonica in Jiangsu（lodging-resistant varieties Nanjing 44 and Wuyunjing 7,lodging line Ning 7412,） were selected as materials to investigate the relationship between plant height and basal stem morphological traits and lodging resistance through nitrogen and potassium fertilizer test.Lodging resistance of rice was significantly positively correlated with length of basal internodes,and significantly negatively correlated with diameter,wall thickness,and wall section area of basal internodes.Meanwhile,differences of lodging resistance among rice varieties were also found.Application of nitrogen and potassium fertilizer had obvious effect on lodging resistance of rice.The results indicated that diameter,wall thickness,wall section area of basal internodes,and the length of the basal internodes had greater influence upon lodging resistance of rice,and the optimal combination of these traits was vital to improve lodging resistance of rice varieties.

关 键 词：水稻 倒伏指数 茎秆形态性状 抗倒性 

分 类 号：S511.034[农业科学—作物学]