Journal of Arid Meteorology

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Effects of Water Stress on Growth Index and Yield of Maize in Shiyang River Basin

REN Liwen 1, 2MA Xingxiang 2   

  1. 1. Key Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration /Key Laboratory of Arid Climatic Change and
    Reducing Disaster of Gansu Province / Institute of Arid Meteorology. China Meteorological Administration,Lanzhou 730020, China;
    2. Agriculture Station of Wuwei Meteorological Bureau of Gansu Province,Wuwei 733000,China
  • Online:2014-10-08 Published:2014-10-08

石羊河流域水分胁迫对玉米生长发育指标和产量的影响

任丽雯1, 2马兴祥2   

  1. 1.中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点实验室,甘肃兰州730020;
    2.甘肃省武威市气象局农业气象试验站,甘肃武威733000
  • 作者简介:任丽雯(1989-),女,甘肃武威人,助理工程师,主要从事农业气象与荒漠生态业务和科研工作.E-mail:rlw2116@126.com
  • 基金资助:

     国家自然科学基金项目“半干旱区作物干旱致灾过程特征及其若干阈值研究”(41275118)“科技部行业(气象)专项农田土壤水分利用效率对气候变化的响应及适应技术”(GYHY201106029)甘肃省气象局气象科研项目“基于作物系数法的春小麦干旱指标体系建立”(2012-15)、中国气象局兰州干旱气象研究所科研项目“黄土高原农田蒸散空间变异特征及其环境影响”(KYS2012BSKY01)共同资助

Abstract:

 This experiment has been designed two modes including normal irrigation treatment (CK)and water stress (DT) .By comparing the changes of maize growth index in different growing stages under two kinds of treatments,the effects of water stress on growth index of maize in arid region were discussed. The results showed that after the jointing stage,water demand for maize plants was urgently.Drought could cause the dysplasia of plant organs,plant short and leaf premature senility.The maize s growth indexes under water stress mode were obviously lower than those under the normal water irrigation treatment mode. During the tasseling-milk ripe stage,drought could cause the grain dysplasia and hollow kernels,small grains and little seeds,while it had an effect on the dry matter distribution.The proportion of grain weight under drought stress mode was obviously lower than that under normal water supply mode.Finally during the mature period,the maize output declined dramatically and even had the empty corn bars.

Key words: maize, arid region, water stress;growth index

摘要:

本实验设计正常灌水处理(CK)和水分胁迫处理(DT)2种模式,通过比较2种水分处理下不同发育期玉米各生育指标的变化,研究干旱地区水分胁迫对玉米不同生育时期生长的影响。结果表明:拔节期后,植株对水分需求迫切,干旱易造成营养器官发育不良、植株矮小、叶片早衰,植株的各项生育期相关指标均显著低于正常灌水处理;抽雄乳熟期,干旱导致果穗发育不良籽粒不饱满穗小粒少,并影响植株内部的干物质分配,穗重所占比例明显低于正常灌水处理,最终导致成熟期产量大幅度下降,部分植株出现空杆。

关键词: 玉米, 干旱区, 水分胁迫, 生长发育指标

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