| 膜下滴灌棉花根系发育特征及其与土壤水盐分布的关系 |
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| 引用本文： | 何雨江,靳孟贵,王在敏,汪丙国,刘磊.膜下滴灌棉花根系发育特征及其与土壤水盐分布的关系[J].高校地质学报,2010,16(1):39-44. |
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| 作者姓名： | 何雨江 靳孟贵 王在敏 汪丙国 刘磊 |
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| 作者单位： | 1. 中国地质大学 环境学院，武汉 430074；2. 新疆农业大学 水利学院，乌鲁木齐 830052 |
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| 基金项目： | 国家科技支撑计划项目(2007BAD38B01);;新疆自治区重大科技专项课题(20073117-3)联合资助 |
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| 摘 要： | 为探讨膜下滴灌条件下水分和盐分对棉花根系空间发育的影响，在花铃期选择相同灌溉制度、咸淡水灌溉的两个膜下滴灌处理田块采集距滴灌带不同距离、不同深度上的根系样品144 件。用1 mm 土筛和手拣将棉花根系从土壤中筛分出来，去除死根，冲洗干净后用扫描仪扫描成tif 格式图像，再用DT-SCAN 软件计算根长密度。对比分析发现膜下滴灌及盐胁迫条件下，咸水灌溉的根系分布范围较大，其总根长密度比淡水大31.69 mm/cm3，根系生长深度也远大于淡水灌溉。咸水灌溉根系分布主要受盐分胁迫，淡水灌溉根系分布主要受水分胁迫。水平方向上距滴头40 cm以远，水分胁迫对根系发育起主导作用。土壤体积含水率在20% 以上、电导率在2 000 μs/cm 以下时可以满足根系的正常生长发育。
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| 关 键 词： | 膜下滴灌 根系分布 土壤水盐动态 |
| 收稿时间： | 2010-03-20 |
| 修稿时间： | 2010-03-20 |
Characteristics of Cotton Root Development under Mulch Drip Irrigation and Their Relationship with Soil Water and Salt Distribution |
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| HE Yu-jiang,JIN Meng-gui,WANG Zai-min,WANG Bing-guo,LIU Lei.Characteristics of Cotton Root Development under Mulch Drip Irrigation and Their Relationship with Soil Water and Salt Distribution[J].Geological Journal of China Universities,2010,16(1):39-44. |
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| Authors: | HE Yu-jiang JIN Meng-gui WANG Zai-min WANG Bing-guo LIU Lei |
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| Institution: | 1. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China;2. School of Water Conservancy, Xinjiang Agricultural University, Urumqi 830052, China |
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| Abstract: | In order to understand the impact of water-salt on spatial development of cotton roots under mulch drip irrigation, 144 root samples were collected in the flower and boll stage for two different treatments irrigated with saline groundwater and fresh surface water using same irrigation system. Screening out cotton roots from the soil with 1 mm soil sieve and hand-picking, removing dead roots, scanning into a tif format images after washing, then the root length density was obtained through DT-SCAN software c... |
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| Keywords: | mulch drip irrigation root distribution soil water-salt dynamics |
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