| 摘要: |
| 试验地点位于我国典型的黄土高原半干旱丘陵山区,由于该区受特殊的地理、地形以及水文气象条件的影响,使得雨水集蓄利用成为解决该区农牧业生产的主要出路。本试验通过有限补充灌溉的方式,采用基于因子分析的主成分提取方法,将玉米穗部性状总结为3个主成分,并分析了各主成分的意义以及在不同补灌条件下对玉米穗部性状的影响。结果表明:影响玉米产量的限制性因子为穗粒重和穗重,并且在主成分分析中,因子载荷分别达到了0.974 8和0.965 1。拔节期补充灌溉处理的穗粒重较不补灌提高62.2%~77.8%,拔节期补充灌溉能够更大程度地提高穗粒重和穗重并减少秃尖长度,研究为集雨补灌旱作区农业节水增产提供了一定的理论依据。 |
| 关键词: 穗部性状 集雨补灌 主成分分析 |
| DOI：10.11841/j.issn.1007-4333.2010.04.002 |
| 投稿时间：2009-12-31 |
| 基金项目:国家"十五"节水农业重大科技专项资助项目(2002AA2Z4221)第一作者:李兴,讲师,博士,主要从事水污染控制与资源化研究,E-mail:lixingmm@yahoo.com.cn通讯作者:程满金,教授级高级工程师,主要从事节水灌溉理论与技术研究,E-mail:chengmanjin@sina.com |
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| Study on maize yield and its ear characters underwater-limited conditions |
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LI Xing1, CHENG Man-jin2, WANG Yong1, GOU Mang-mang2
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| (1.Inner Mongolia Engineering Research Center for Water-saving Agriculture,Inner Mongolia Normal University,Hohhot 010022,China;2.Institute of Water Conservancy Science Inner Mongolia Municipality,Hohhot 010020,China) |
| Abstract: |
| The experiment site is located in the typical semi-arid mountain area of the Loess Plateau in China.Subjected to the adverse effects of special geography,topography and hydro-meteorological conditions,collection and utilization of the rainwater is one of the major solution to agricultural and livestock production in this region.The experiment is performed under different supplementary irrigation conditions.The ear characters are grouped into three major components by using principal component analysis method.Meantime the meaning of all the main components and the impact of corn ear traits in different supplementary irrigation conditions are analyzed.The results showed that ear kernel weight and ear weight are limiting factors affecting maize yield and the factor loading are 0.974 8 and 0.965 1 respectively.Ear kernel weight of supplemental irrigation is 62.2%－77.8% higher than that of ear kernel weight under no irrigation condition at jointing stage.Test showed that supplemental irrigation and increasing the amount of supplementary irrigation within a certain extent can increase ear kernel weight,ear weight and reduce the length of the bald results will provide a theoretical basis for water saving and increasing yield in rainfed farming region. |
| Key words: ear characters supplemental irrigation of harvested rainwater analysis of principal components |
