施氮量对优质香稻泸优2025茎秆性状及产量的影响  

Effects of Nitrogen Application Rate on Stem Traits and Yield of High-quality Fragrant Rice Luyou 2025

作　　者：邹文广 候新坡 马彬林 卓伟 杨旺兴 杨腾帮 杨国星 许旭明 ZOU Wenguang;HOU Xinpo;MABinlin;ZHUO Wei;YANG Wangxing;YANG Tengbang;YANG Guoxing;XU Xuming(Sanming Academy of Agricultural Sciences,Sanming,Fujian 365500)

机构地区：[1]三明市农业科学研究院,福建三明365500

出　　处：《福建稻麦科技》2024年第4期24-27,共4页Fujian Science and Technology of Rice and Wheat

基　　金：福建省科技厅引导性项目(2022N0038)。

摘　　要：以优质香稻泸优2025为材料,研究不同施氮量处理对其茎秆性状及产量的影响。结果表明,随着施氮量增加,倒4节间长和倒5节间长增长,倒3节间长呈先增后略减再增的变化趋势;节间粗随着施氮量增加而增粗;随着施氮量增加,倒3节茎秆壁厚、倒4节茎秆壁厚变薄,倒5节茎秆壁厚呈无规律性变化;各节间尤其基部节间至穗顶高度及至穗顶重量随着施氮量增加而显著增加;随着施氮量增加,各节间抗折力极显著降低,而各节间弯曲力矩、倒伏指数显著增加;随着施氮量增加,产量和每穗总粒数呈抛物线变化趋势,有效穗数极显著增加,而结实率、千粒重降低;产量和每穗总粒数以150 kg/hm^(2)处理下的数值最高。The effects of different nitrogen application rates on stem traits and yield of high-quality fragrant rice Luyou 2025 were studied.The results showed that with the increase of nitrogen rate,the fourth and fifth internodes length increased,and the third internode length increased first,then decreased slightly and then increased.Culm diameter was increased,culm wall thickness of the third and fourth internode thinned,but the fifth internode showed an irregular trend.Length and weight of each internode,especially the basal internode to the ear top increased significantly.breaking resistance of each internode decreased significantly,while the bending moment and lodging index of each internode increased significantly.The effective panicle number was increased significantly,while the seed setting rate and 1000-grain weight decreased,yield and total grain number per panicle were the highest under the treatment of 150 kg/hm^(2).

关 键 词：施氮量 香稻:泸优2025 茎秆性状 产量 

分 类 号：S511.06[农业科学—作物学]