| 滴灌水质与灌溉频率对高含盐土壤棉花苗期生长的影响 |
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| 引用本文： | 王伟,李光永,曾德超.滴灌水质与灌溉频率对高含盐土壤棉花苗期生长的影响[J].灌溉排水学报,2008,27(6):37-40. |
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| 作者姓名： | 王伟 李光永 曾德超 |
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| 作者单位： | [1]中国农业大学工学院,北京100083 [2]中国农业大学水利与土木工程学院,北京100083 |
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| 基金项目： | 国家自然科学基金
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| 摘 要： | 研究了滴灌水质与灌溉频率对棉花苗期生长的影响。试验土壤为砂壤土(砂粒68%、粉粒24%、粘粒8%),土壤初始含盐量为0.8%。灌溉水质有3个水平,分别为CK(自来水)、S10(SAR=10,EC=3)与S5(SAR=5,EC=3);灌溉频率有3个水平,分别为高频(每4 d)、中频(每8 d)与低频(每16 d)。一条滴灌管灌溉2行棉花,棉花的行距为40 cm,株距为10 cm。试验结果表明,在高含盐土壤中,高频灌溉时,水质对棉苗生长的影响更大;微咸水灌溉有利于棉花苗期生长。灌溉频率对地上、地下各生长指标与总干重均有显著影响。微咸水灌溉时,地上部分生长指标与总干重在中频灌溉时均为最大,而根干重与根总长却均随灌溉频率的降低而增加,这表明棉苗在中频灌溉时所受的水分与盐分综合胁迫最小。灌溉水质与频率对根冠比均有显著影响,降低灌溉频率有利于棉花苗期根系发育。
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| 关 键 词： | 滴灌 水质 棉花 灌溉频率 |
Effects of Water Quality and Drip Irrigation Frequency on Growth Parameters of Cotton Seedling under High Initial Soil Salt Content |
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| WANG Weia,LI Guang-yongb,ZENG De-chaoa.Effects of Water Quality and Drip Irrigation Frequency on Growth Parameters of Cotton Seedling under High Initial Soil Salt Content[J].Journal of Irrigation and Drainage,2008,27(6):37-40. |
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| Authors: | WANG Weia LI Guang-yongb ZENG De-chaoa |
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| Institution: | WANG Wei~a,LI Guang-yong~b,ZENG De-chao~a(China Agricultural University a.College of Engineering,b.College of Water Conservancy , Civil Engineering,Beijing 100083,China) |
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| Abstract: | Effects of irrigation water quality and irrigation frequency was investigated on growth parameters of cotton seedling in an unheated rain preventing greenhouse.Sandy loam(sand 68%,silt 24% and clay 8%) with initial salt content of 0.8% is used for the experiment.The irrigation water quality has 3 levels,which is CK(tap water),S10(SAR=10,EC=3) and S5(SAR=5,EC=3) respectively.The irrigation frequency has 3 levels,which is high frequency(4 days),moderate frequency(8 days) and low frequency(16 days) respectivel... |
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| Keywords: | drip irrigation irrigation water quality cotton irrigation frequency |
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