喷施多效唑对谷子农艺性状及抗倒伏力的影响  

Effects on Agronomic Characters and Lodging Resistance of Foxtail Millet by Spraying Paclobutrazol

作　　者：聂萌恩 柳青山[1] 白文斌[1] 郭平毅[2] 张伟[1] 范昕琦[1] 王海燕[1] 李志华[1] Nie Meng’en;Liu Qingshan;Bai Wenbin;Guo Pingyi;Zhang Wei;Fan Xinqi;Wang Haiyan;Li Zhihua(Sorghum Research Institute,Shanxi Academy of Agricultural Sciences,Shanxi Key Laboratory of Sorghum Genetics&Germplasm Enhancement,Jinzhong Shanxi 030600;Shanxi Agricultural University,Taigu Shanxi 030800)

机构地区：[1]山西省农业科学院高粱研究所,高粱遗传与种质创新山西省重点实验室,山西晋中030600 [2]山西农业大学,山西太谷030800

出　　处：《中国农学通报》2019年第33期35-41,共7页Chinese Agricultural Science Bulletin

基　　金：晋中市重点科技创新平台“酿造高粱产业化关键技术重点科技创新平台”(P181002);国家青年基金“油菜素内酯缓解谷子阔世玛药害的光合生理机制研究”(31301269);高粱所所级课题“高异交结实谷子中晚熟高度雄性不育系的选育”(GLS2016-13)

摘　　要：倒伏是谷子"高产、优质、高效"综合生产目标的限制因素之一。为了研究喷施多效唑对谷子抗倒伏力的影响,本试验以‘晋谷21号’和‘张杂谷5号’为研究材料,采用随机区组设计,苗期叶面喷施150、300、600、1200 mg/L多效唑,清水作对照,收获期分别测定谷子茎秆机械强度和产量。结果表明:随施药浓度的增加,谷子株高逐渐降低,伸长节间数和节间长度逐渐减少,节间增粗增厚,抗倒伏力逐渐增强。与对照组相比,300 mg/L多效唑处理‘晋谷21号’和‘张杂谷5号’株高分别降低14.12%和22.10%,节间数分别减少1.2和0.8,其中N3节间节长分别减小1.70 cm和2.20 cm,茎粗分别增大0.61 mm和0.44 mm,茎壁厚度分别增大0.64 mm和0.29 mm,抗倒伏力分别增强24.79%和47.55%,产量分别增加1.12 kg/hm^2和1.27 kg/hm^2。苗期叶面喷施300 mg/L多效唑有利于形成基部节间短而粗,茎壁厚度大,茎秆充实程度好,抗倒伏力强的株型,进而提高其产量。Lodging is one of the constraints to the integrated production target of high yield,good quality,high efficiency for foxtail millet(Setaria italica L.).In order to study the effect of Paclobutrazol on lodging resistance of foxtail millet,‘Jingu 21’and‘Zhangza 5’were used as materials.The experiment was conducted as a randomized block design.Four concentrations(150,300,600,1200 mg/L)of Paclobutrazol were applied on foxtail millet at the seedling stage,with distilled water as control.The culm mechanical strength and yield were determined at the harvest time.The results showed that plant height,internode number and internode length decreased with increasing Paclobutrazol concentrations,whereas culm diameter,culm wall thickness and lodging resistance increased.Compared with the control,‘Jingu 21’and‘Zhangza 5’treated with 300 mg/L Paclobutrazol,plant height decreased by 14.12%and 22.10%,internode number decreased by 1.2 and 0.8,internode length of N3 decreased 1.70 and 2.20 cm,culm diameter increased 0.61 and 0.44 mm,culm wall thickness increased 0.64 mm and 0.29 mm,lodging resistance increased 24.79% and 47.55%,yield increased by 1.12 and 1.12 kg/hm^2,respectively.In conclusion,treatment with Paclobutrazol 300mg/L at the seedling stage is benefit for forming the plant type with short and thick basal internodes,large wall thickness,culm plumpness status and strong lodging resistance,thus enhance yield.

关 键 词：谷子 农艺性状 抗倒伏力 产量 多效唑 叶面喷施 

分 类 号：S515[农业科学—作物学]