摘要
[目的]探究白羊草(Bothriochloa ischaemum)种子生产适宜的株距和行距配比。[方法]以“太行”白羊草种子为试验材料,采用双因素裂区试验设计,分别设置4个株距水平(记为R_(1)、R_(2)、R_(3)、R_(4),分别为30、45、60、75 cm)和4个行距水平(记为L_(1)、L_(2)、L_(3)、L_(4),分别为30、45、60、75 cm),研究不同株行距配比对白羊草种子产量及其构成因子的影响。[结果]株距和行距对白羊草生殖枝数、花序长、株高、落粒率均有极显著(P<0.01)的交互作用。株距和行距的交互作用对白羊草实际种子产量有极显著(P<0.01)影响。相关性分析表明,株距与生殖枝数、小穗数、理论种子产量和实际种子产量呈显著(P<0.05)正相关关系,与花序长呈显著(P<0.05)负相关关系;行距与生殖枝数、小穗数、千粒重、理论种子产量和实际种子产量呈显著(P<0.05)正相关关系,与花序长呈显著(P<0.05)负相关关系。主成分分析表明,前两个主成分累积贡献率为81.946%,决定第1公因子的主要性状是生殖枝数、小穗数、花序长、落粒率、千粒重、理论种子产量、实际种子产量,第2公因子贡献率为20.994%。产量指标综合评价表明,R_(3)L_(3)(60 cm×60 cm)分数最高,为5.039。[结论]为获得白羊草最高种子产量,将株距和行距均设置为60 cm为宜。
[Objective]This study was conducted to explore the optimal plant spacing and row spacing for seed production of Bothriochloa ischaemum.[Method]Using Bothriochloa ischaemum′Taihang′seeds as the experimental materials and a two-factor split zone experiment design,four plant spacing levels(R_(1)=30 cm,R_(2)=45 cm,R_(3)=60 cm,R_(4)=75 cm)and four row spacing levels(L_(1)=30 cm,L_(2)=45 cm,L_(3)=60 cm,L_(4)=75 cm)were set up to assess the effects of different plant spacing and row spacing combinations on seed yield and its components of Bothriochloa ischaemum.[Result]Plant spacing and row spacing had extremely significant(P<0.01)interactions on the reproductive branch number,inflorescence length,plant height and shattering rate.The interactions between plant spacing and row spacing had extremely significant(P<0.01)effects on the actual seed yield of Bothriochloa ischaemum.Correlation analysis demonstrated that plant spacing was significantly(P<0.05)positively correlated with the reproductive branch number,spikelet number,theoretical seed yield and actual seed yield,and significantly(P<0.05)negatively correlated with the inflorescence length;the row spacing was significantly(P<0.05)positively correlated with the reproductive branch number,spikelet number,thousand grain weight,theoretical seed yield and actual seed yield,and significantly(P<0.05)negatively correlated with the inflorescence length.Principal component analysis showed that the cumulative contribution rate of the first two principal components was 81.946%.The main traits determining the first common factor were reproductive branch number,spikelet number,inflorescence length,shattering rate,thousand grain weight,theoretical seed yield and actual seed yield.The contribution rate of the second common factor was 20.994%.The comprehensive evaluation of yield indicators revealed that R_(3)L_(3)(60 cm×60 cm)had the highest score of 5.039.[Conclusion]To achieve the highest seed yield of Bothriochloa ischaemum,the optimal plant spacing and row spacing were 60 c
作者
曾佳
郭嘉庆
夏方山
李尹琳
白朝瑞
李韩晶
ZENG Jia;GUO Jiaqing;XIA Fangshan;LI Yinlin;BAI Chaorui;LI Hanjing(College of Grassland Science,Shanxi Agricultural University,Taigu030801,China)
出处
《畜牧与饲料科学》
2024年第1期63-70,84,共9页
Animal Husbandry and Feed Science
基金
山西省2022年大学生创新创业训练计划项目(20220163)
中央引导地方科技发展资金项目(YDZJSX2022C011)
山西省重点研发计划项目(202102140601006)
山西农业大学“十四五”生物育种工程项目(YZGC134)。
关键词
白羊草
株距
行距
产量构成因子
种子产量
Bothriochloa ischaemum
plant spacing
row spacing
yield component
seed yield
