青稞苗期耐低氮特性鉴定与筛选  

Identification and Screening of Low Nitrogen Tolerance Characteristics of Highland Barley at Seedling Stage

作　　者：时学双 韩婧 范晓通 孔凡美[1] 张小村 SHI Xueshuang;HAN Jing;FAN Xiaotong;KONG Fanmei;ZHANG Xiaocun(College of Resources and Environment,Shandong Agricultural University,Tai’an 271018,China;Shigatse Agricultural and Animal Husbandry Scientific Research and Extension Center,Shigatse 857000,China)

机构地区：[1]山东农业大学资源与环境学院,山东泰安271018 [2]日喀则市农牧业科学研究推广中心,西藏日喀则857000

出　　处：《大麦与谷类科学》2024年第5期43-48,共6页Barley and Cereal Sciences

基　　金：日喀则市科技计划(RKZ2021KJ05)。

摘　　要：为研究青稞苗期耐低氮特性,以98份青稞品种(系)为材料,设置低氮(0.1 mmol/L)和正常氮(1.0 mmol/L)2个处理,分析低氮和正常氮水平下青稞苗期叶绿素SPAD值、植株鲜质量、根系长度、养分质量分数等指标的变化。结果表明,相比正常氮处理,低氮处理的98份青稞根系平均长度从25.04 cm增加到29.51 cm,根冠比从0.48增加到0.79,根系平均鲜质量从0.23 g/株增加到0.28 g/株;单株地上部平均长度从34.18 cm降低到28.64 cm,地上部平均鲜质量从0.61 g/株降低到0.30 g/株,叶绿素SPAD值从23.41降低到21.26,氮质量分数从29.11 g/kg降低到15.50 g/kg。黑青稞、Jiangse、喜马拉23这3个青稞材料在低氮处理下的氮效率为8.14,高于该试验条件下其他青稞品种(系),为该试验条件青稞苗期低氮高效品种(系)。To explore the low nitrogen tolerance traits of highland barley at seedling stage,98 varieties(lines)were used as the materials,and 2 treatments of low nitrogen(0.1 mmol/L)and normal nitrogen(1.0 mmol/L)were set up.The variations of chlorophyll levels,fresh plant weight,root length,and nutrient mass fraction at the seedling stage under both nitrogen conditions were analyzed.The results showed that compared with the normal nitrogen treatment,the average root length of 98 barley samples under low nitrogen conditions increased from 25.04 cm to 29.51 cm.The root-shoot ratio rose from 0.48 to 0.79,and the average fresh root weight increased from 0.23 g/plant to 0.28 g/plant.The average aboveground length of single plant reduced from 34.18 cm to 28.64 cm.The average aboveground fresh weight reduced from 0.61 g/plant to 0.30 g/plant.The SPAD value decreased from 23.41 to 21.26,and the nitrogen mass fraction decreased from 29.11 g/kg to 15.50 g/kg.Notably,the nitrogen efficiency of Heiqingke,Jiangse,and Ximara 23 under low nitrogen conditions was 8.14,which was higher than that of other varieties tested.Thus,they are high-efficiency varieties(lines)under low nitrogen conditions at the seedling stage.

关 键 词：青稞 低氮 苗期 农艺性状 

分 类 号：S512.3[农业科学—作物学]