不同密度水平对裸燕麦(Avena nuda)光合特性、产量及品质的影响  

Effects of Different Densities Levels on Photosynthetic Characteristics,Yield and Quality of Naked Oat(Avena nuda)

作　　者：王雪莱 郭潇潇 于崧 郭伟 于立河 薛盈文 Wang Xuelai;Guo Xiaoxiao;Yu Song;Guo Wei;Yu Lihe;Xue Yingwen(Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement,College of Agriculture,Heilongjiang Bayi Agricultural University,Daqing,163319)

机构地区：[1]黑龙江八一农垦大学农学院,黑龙江省现代农业栽培技术与作物种质改良重点实验室,大庆163319

出　　处：《分子植物育种》2020年第23期7943-7952,共10页Molecular Plant Breeding

基　　金：国家科技重大专项和重点研发项目省级资金资助项目(GX18B040)资助。

摘　　要：为了给松嫩平原地区燕麦优质高产栽培提供参考,以裸燕麦品种‘白燕2号’为试验材料,设置300万株/hm^2、450万株/hm^2、600万株/hm^2、750万株/hm^2、900万株/hm^2、1050万株/hm^2这6个密度处理,对比分析各处理叶面积指数、叶绿素相对含量、光合参数、产量及籽粒品质的差异。结果表明,随着密度的增加,叶面积指数在开花期之前逐渐升高,开花期之后呈先升高后降低的变化趋势;各生育时期旗叶SPAD、净光合速率、蒸腾速率、胞间CO2浓度及气孔导度均随密度的增加而降低;随着密度增加,鲜草产量与干草产量均呈先升高后降低的变化趋势,在基本苗为750万株/hm^2时最高;子粒产量和营养产量也呈先升高后降低的变化,在基本苗为450万株/hm^2时最高;密度对子粒品质影响显著,各营养成分含量随密度的增加呈现出不同的变化趋势。综上所述‘,白燕2号’在松嫩平原地区,以收获籽粒为目的,适宜的种植密度为450万株/hm^2;以收获饲草为目的,种植密度为750万株/hm^2较为适宜。In order to provide reference for high-quality and high-yield oat cultivation in Songnen plain area,naked oat variety’Baiyan 2’was used as the experimental material,set up in 300×10^4 plants/hm^2,450×10^4 plants/hm^2,600×10^4 plants/hm^2,750×10^4 plants/hm^2,900×10^4 plants/hm^2 and 1050×10^4 plants/hm^2 density treatments,and leaf area index,relative chlorophyll content,photosynthetic parameters,yield and grain quality were compared and analyzed of each treatment.The results showed that with the increase of density,the leaf area index increased gradually before the anthesis stage,and then increased and then decreased after the anthesis stage.The SPAD,net photosynthetic rate,transpiration rate,intercellular carbon dioxide concentration and stomatal conductance of flag leaves decreased with the increase of density.With the increase of density,both the fresh yield and the hay yield showed a trend of first increasing and then decreasing,which was highest when the basic seedlings were 750×10^4 plants/hm^2,and the grain yield and nutrient yield also showed a trend of first increasing and then decreasing,which was highest when the basic seedlings were 450×10^4 plants/hm^2.Density has a significant effect on grain quality,and the nutrient content varies with the increase of density.In conclusion,’Baiyan2’was planted in Songnen plain area with a suitable planting density of 450×10^4 plants/hm^2 for the purpose of harvesting seeds.For the purpose of forage harvest,planting density of 750×10^4 plants/hm^2 is the most appropriate.

关 键 词：裸燕麦(Avena nuda) 密度 光合特性 产量 品质 

分 类 号：S512.6[农业科学—作物学]