摘要
黑龙江省大豆苗期低温冷害频发,为了明确大豆苗期低温胁迫对籽粒产量是否有影响,试验采用盆栽方法,在大豆V1期将自然环境下生长的幼苗置于人工气候箱进行不同温度处理,分别为6℃,10℃和25℃(对照),处理48 h后测定叶片鲜重、子叶鲜重、茎鲜重、根系鲜重及叶片叶绿素含量,然后将幼苗转移到盆栽盆中生长,成熟期测定大豆籽粒产量及产量构成因子。结果表明:大豆幼苗期低温胁迫显著降低了不同大豆品种叶片鲜重、子叶鲜重、茎鲜重、根系鲜重及叶绿素含量;随着温度的降低,耐低温大豆品种‘合农60’的形态及生理指标降低幅度要低于低温敏感型大豆品种‘黑农48’。苗期低温胁迫未显著降低耐低温大豆品种‘合农60’株荚数、株粒数、百粒重及籽粒产量,但显著降低了低温敏感型大豆‘黑农48’的株荚数、株粒数、百粒重及籽粒产量。研究得出结论为苗期大豆低温胁迫不利于大豆籽粒产量形成,显著降低低温敏感品种大豆籽粒产量。
Chilling damage often happens at soybean seedling stage in Heilongjiang.To clarify the effect of chilling damage at seedling stage on soybean yield,a pot experiment was conducted.At V1 stage,soybean seedlings in the natural environment were moved into artificial climate cabinet for different temperature treatments,including 6℃,10℃,and 25℃(CK).After 48 h,fresh leaf weight,fresh cotyledon weight,fresh stem weight,fresh root weight and chlorophyll content of soybean seedling were determined.And then soybean seedlings were transferred to bigger pot for growth.The seed yield and yield components were measured at maturity stage.The results showed that cold stress significantly decreased fresh leaf weight,fresh cotyledon weight,fresh stem weight,fresh root weight and chlorophyll content.Morphological and physiological parameters of cold-resistant variety‘Henong60’decreased much more slowly than cold-sensitive variety‘Heinong48’with the temperature decrease.Cold stress at seedling stage did not significantly decrease pod number per plant,seed number per plant,100-seed weight and seed yield of‘Henong60’.However,pod number per plant,seed number per plant,100-seed weight and seed yield of‘Heinong48’were significantly decreased by cold stress at seedling stage.Therefore,the cold stress at soybean seedling stage is not beneficial to the formation of seed yield and can significantly decrease the seed yield of cold-sensitive variety.
作者
盖志佳
张敬涛
刘婧琦
蔡丽君
杜佳兴
孟庆英
谷维
陈磊
Gai Zhijia;Zhang Jingtao;Liu Jingqi;Cai Lijun;Du Jiaxing;Meng Qingying;Gu Wei;Chen Lei(Heilongjiang Academy of Agricultural Sciences Postdoctoral Program,Harbin 150086,Heilongjiang,China;Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences,Jiamusi 154007,Heilongjiang,China;Heilongjiang Provincial Engineering Technology Research Center of Crop Cold Damage,Harbin 150086,China;Agricultural and Chemical Research Institute,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,Heilongjiang,China)
出处
《农学学报》
2019年第12期1-4,共4页
Journal of Agriculture
基金
黑龙江省博士后基金(LBH-Z18268)
黑龙江省农业科学院院级科研项目“大豆玉米持续轮作免耕对土壤理化特性影响的研究”(2017S07)
黑龙江省现代农业产业技术协同创新推广体系项目大豆高产栽培岗位
国家大豆产业体系佳木斯综合试验站
黑龙江省农业科学院博士启动资金项目
关键词
低温胁迫
大豆
幼苗
形态
生理
产量
Cold Stress
Soybean
Seedling
Morphology
Physiology
Yiel
