播种量对夏高粱生长发育及产量的影响  

Effects of different seeding rates on the growth and grain yield of summer sorghum

作　　者：刘芮芮 崔福柱[1] 乔佳秀 郝国花 杨慧 Liu Ruirui;Cui Fuzhu;Qiao Jiaxiu;Hao Guohua;Yang Hui(College of Agriculture,Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《山西农业大学学报（自然科学版）》2020年第3期62-68,共7页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：山西省重点研发计划(201703D221012-1);山西省重点研发计划重点项目(201703D211001-02)。

摘　　要：[目的]本研究主旨探索播种量对夏播高粱生长发育期间的农艺性状和产量的影响,明确山西省中部地区夏播高粱的合理播种量。[方法]本研究于2016年在山西省晋中市太谷县山西农业大学农作站进行大田试验。试验采用单因素随机区组设计,共设3.75、7.5、11.25、15、18.75、22.5 kg•hm^-2共6个不同播种量水平,研究不同的播种量水平对夏播高粱生育期、株高、叶面积等农艺性状,以及穗长、穗重、穗粒重、百粒重等产量性状及产量的影响。[结果]播种量为15 kg•hm^-2时株高达到最大值195.5 cm,播种量为22.5 kg•hm^-2时叶面积指数最大,播种量为7.5 kg•hm^-2时,穗长达到最大值;百粒重、穗重和穗粒重随播种量的增加逐渐减少,成穗数随播种量的增加而增加;随着播种量的增加,出苗数表现出增加的趋势,但成穗率下降;产量随高粱播种量的增加呈现先增加后减小的趋势,符合方程y=0.7779x3-44.597x2+734.54x+1466.7(R²=0.9877),在播种量为11.25 kg•hm^-2时有最大值5294.8 kg•hm^-2。[结论]综合分析,山西省中部地区夏播高粱晋杂30号最佳播种量为11.25 kg•hm^-2,在此适宜播种量下,晋杂30号可以获得良好的生长发育以及高的产量。[Objective]Present study was designed to explore the effects of different seeding rates on yield and agronomic traits of seedlings during growth season of summer sorghum,and to determine the reasonable seeding rate of summer sorghum in the central region of Shanxi Province.[Methods]Field trials were conducted at the Farming Station of Shanxi Agricultural University,Taigu,Shanxi in 2016.A single factor random block design was applied and six different seeding rate levels were tested,including 3.75 kg•hm^-2,7.5 kg•hm^-2,11.25 kg•hm^-2,15 kg•hm^-2,18.75 kg•hm^-2,and 22.5 kg•hm^-2.The impacts of different seeding rate levels on both agronomic traits including growth period,plant height,and leaf area of summer-sown sorghum,and yield-related traits including ear length,ear weight,ear grain weight,and 100 grain weight were investigated.[Results]Study results indicated that the highest plant height of 195.5 cm was reached out at the seeding rate of 15 kg•hm^-2,and the largest leaf area index was observed when the seeding rate was 22.5 kg•hm^-2,while the biggest ear length was detected in the treatment with seeding rate at 7.5 kg•hm^-2.The 100-seed weight,ear weight,and ear grain weight were decreased gradually with the increase of seeding amount,and the number of ears was increased responding to the increase of seeding amount.The number of Seedling emergence rate was positively reacting to the increase of the seeding rate,but the ear rate negatively responded to.The response of yield to the increase of seeding rate was more complicated,that reacted as increasing first and then decreased,and the reaction accorded with the equation y=0.7779x3-44.597x2+734.54x+1466.7(R²=0.9877)which indicated that the greatest yield of 5294.8 kg•hm^-2 was produced at the seeding rate of 11.25 kg•hm^-2.[Conclusion]Comprehensive analysis demonstrated that the optimal seeding rate for summer sowing sorghum Jinza No.30 was determined as 11.25 kg•hm^-2 in the central region of Shanxi Province,which could obtain good grow

关 键 词：夏播高粱 播种量 农艺性状 产量 

分 类 号：S514[农业科学—作物学]