| 喷灌条件下冬小麦根系分布与土壤水分条件的关系 |
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| 引用本文： | 高鹭,胡春胜,陈素英.喷灌条件下冬小麦根系分布与土壤水分条件的关系[J].华南农业大学学报,2006,27(1):5-8. |
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| 作者姓名： | 高鹭 胡春胜 陈素英 |
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| 作者单位： | 中国科学院,遗传与发育生物学研究所,河北,石家庄,050021 |
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| 摘 要： | 根据喷灌水分在土壤中的分布特点，研究了不同灌水定额下冬小麦根系生长规律和分布状况．结果表明：同地面灌相比，喷灌条件下作物根系相对集中于表层，有上移现象，喷灌更适合作物生长需要，可提高水分的利用率；根长密度不论是在拔节期还是在收获时其最大值总是在20cm深度，在剖面上的垂直分布随深度增加而递减；不同灌水处理下根系的衰亡速率出现差异，灌水量大根系的衰亡速率较小，在灌水总量相近的情况下，表层能较长时间保持湿润的处理，其根系衰亡速率要小。总体根系的衰亡主要表现为表层根系的衰亡；在该试验的3个灌溉水平下，小麦拔节期和收获时各处理不同层次的根干质量无显著性差异．
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| 关 键 词： | 喷灌 冬小麦 根系生长 根系分布 |
| 文章编号： | 1001-411X（2006）01-0005-04 |
| 收稿时间： | 2005-01-12 |
| 修稿时间： | 2005年1月12日 |
The Relationship Between Soil Water Content and Root Distribution of Winter Wheat Under Sprinkling Irrigation Condition |
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| GAO Lu,HU Chun-sheng,CHEN Su-ying.The Relationship Between Soil Water Content and Root Distribution of Winter Wheat Under Sprinkling Irrigation Condition[J].Journal of South China Agricultural University,2006,27(1):5-8. |
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| Authors: | GAO Lu HU Chun-sheng CHEN Su-ying |
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| Institution: | Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Shijiazhuang 050021, China |
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| Abstract: | Based on soil moisture distribution under sprinkler irrigation,the root growth and distribution of winter wheat under different irrigation conditions were studied.The results show that sprinkling irrigation is more useful for the plant's growing and can also increase the efficient utilization of water.Under sprinkling irrigation,the root of the plant concentrates on the upper soil and tends to move up.Both of jointing stage and ripening stage, the maximum of root length density apprears on the 20 cm layer and root length density decreases with the increases of the depth under 20 cm.The root's death rate is different under different water treatments.The death of the root is mainly occured on the surface of soil.When analyzing the root dry mass of different layers of the three treatments in jointing and ripening stages,the difference isn't significant. |
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| Keywords: | sprinkler irrigation winter wheat root growth root distribution |
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