摘要
为了给大麦耐渍性品种的筛选、改进栽培措施和应对气象灾害提供理论依据,通过采用盆栽‘华大麦9号’进行苗期模拟渍涝处理,探讨大麦在苗期受渍后的生长状况、生理特性。结果表明:大麦苗期对渍涝的抵抗能力较强,21天以内的渍涝对大麦生育期影响较小,随受渍害时间的延长,大麦生育期出现推迟。苗期渍害对大麦的株高、茎粗和叶绿素SPAD值有影响,随着淹水处理时间的延长而胁迫加重,21天以上的渍涝处理会造成其显著降低。苗期渍害对大麦穗数、穗长、总粒数、实粒数、千粒重、种子产量和秸秆产量都有显著影响,随着淹水处理时间的延长,种子和秸秆产量减低直至绝产,21天以上的渍涝处理其农艺性状显著降低。因此综合以上分析可知,苗期渍害对对大麦秸秆饲用品质有严重影响,受渍害时间的延长,饲用品质降低,尤其以21天以上的渍涝处理降低较显著。大麦苗期淹水对其农艺性状无显著影响的极限时间为14天。
The study aims to screen varieties that are resistant to flood, improve cultivation measures and provide theoretical basis for responding to meteorological disasters. This research made waterlogging treatment on the potted ＇Huadamai9＇ in seedling and variation of barley in seedling stage resistance ability was stronger in stage and explored the growth condition, physiological characteristics after waterlogging treatment. The results showed that the waterlogging seedling stage and the barley growth period was less affected under waterlogging treatment within 21 days .The barley growth period delayed with the extension of the waterlogging time. Under seedling waterlogging, the plant height, stem diameter and chlorophyll SPAD value of barley were affected and as the extension of flooding processing time, the stress was aggravating. 21 days or even longer waterlogging treatment made the plant height, stem diameter and chlorophyll SPAD value decrease significantly. The spike number, spike length, total grains and real grams, weight of 1000-grams, seea ana straw yield were significantly affected under seedling waterlogging, as the extension of flooding time, seeds and straw yield reduced or even had crops failure. The agronomic traits significantly reduced under 21 days＇ waterlogging treatment or even longer. By comprehensive analysis, seedling waterlogging had serious effect on the straw forage quality of barley. The longer duration of waterlogging, the poorer forage quality, especially significant in the waterlogging treatment which was more than 21 days＇. The limit time that seedling water flooding had no significant effect on the agronomic traits of barley is 14 days.
出处
《中国农学通报》
2015年第15期12-16,共5页
Chinese Agricultural Science Bulletin
基金
国家科技支撑计划子课题"环洞庭区避灾种植模式研究与集成示范"(2012BAD20B05-04)
关键词
大麦
苗期
渍涝
农艺性状
秸秆饲用品质
barley
seedling stage
waterlogging
agronomic traits
forage quality
