摘要
了解谷子植株对遮光的响应,为黄土高原低洼地带及林粮间作模式中的谷子种植提供理论数据,本研究以谷子品种长生13为试验材料,研究其在4种光照强度(遮光度分别为0%、9%、17%和34%)条件下的农艺性状、产量、干物质量、旗叶相对叶绿素含量及顶三叶叶面积变化情况。结果表明:随着遮光度的增加,穗粗、穗重和产量均逐渐减小,株高和千粒重差异不显著;在完熟期单株干物质量和谷穗干物质量随着遮光度的增加而减小,根、茎、叶干物质总量与之相反;随着遮光度的增加,旗叶相对叶绿素含量(SPAD值)降低,顶三叶叶面积逐渐变大。说明遮光处理显著降低了谷子谷穗的干物质量和产量,且两者均随着遮光程度的增加而降低;遮光处理还会降低谷子旗叶的相对叶绿素含量,增大谷子顶三叶叶面积。
To understand the response of millet plants to shading and to provide theoretical basis for millet planting in low-lying areas of the Loess Plateau and forest-grain intercropping models.The study used the millet variety Changsheng 13 as the experimental material to investigate its agronomic traits,yield,dry matter content,relative chlorophyll content in flag leaves,and changes in the leaf area of the top three leaves under four light intensity conditions(with shading rates of 0%,9%,17%and 34%).The results revealed that ear thickness,ear weight,and yield progressively decreased as shading increased,with no significant variation observed in plant height and thousandgrain weight.At the maturity stage,the dry matter mass of individual plants and the dry matter of grain ears decreased with increasing shading,whereas the total dry matter of roots,stems,and leaves followed an inverse pattern.The relative chlorophyll content(SPAD)of millet flag leaves also decreased with the increase of shading.With the increase of shading,the leaf area of the top three leaves of millet would gradually increase.The shading treatment significantly reduced the dry matter quality of millet ears and yield which were decreased with the increase of the shading.Shading treatment would also reduce the relative chlorophyll content of millet flag leaves;and shading treatment made the area of the top three leaves of millet apex moderately larger.
作者
刘鑫
田岗
王玉文
刘永忠
李会霞
余爱丽
成锴
王振华
刘红
李万星
曹晋军
张鹏
LIU Xin;TIAN Gang;WANG Yuwen;LIU Yongzhong;LI Huixia;YU Aili;CHENG Kai;WANG Zhenhua;LIU Hong;LI Wanxing;CAO Jinjun;ZHANG Peng(Millet Research Institute,Shanxi Agricultural University,Changzhi 046011,China)
出处
《东北农业科学》
2023年第3期10-14,共5页
Journal of Northeast Agricultural Sciences
基金
山西农业大学生物育种工程项目(YZGC027)
中央引导地方科技发展资金项目(YDZJSX2022A048、YDZJSX2021C015)
山西省重点研发计划项目(202102140601003、2022ZDYF107)
关键词
谷子
光照强度
干物质量
农艺性状
产量性状
叶绿素含量
Setaria italica
Light intensity
Dry matter quality
Agronomic character
Yield trait
Chlorophyll content
