| 土壤质地对地下滴灌灌水器水力要素的影 |
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| 引用本文： | 李刚,白丹,王晓愚,付嘉.土壤质地对地下滴灌灌水器水力要素的影[J].农业机械学报,2009,40(2):58-62. |
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| 作者姓名： | 李刚 白丹 王晓愚 付嘉 |
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| 作者单位： | 西安理工大学西北水资源与环境生态教育部重点实验室,西安,710048 |
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| 摘 要： | 为研究不同质地土壤中灌水器水力要素的变化规律及其差异,选取灌水器工作压力、土壤容重和土壤初始含水率为因素,分别在粘土、壤土和砂土中采用混合水平均匀设计安排试验.试验结果表明,不同土壤中的灌水器出流规律一致:即当工作压力不变时,灌水器流量在灌水初期略大,而后减小并趋于恒定,这个变化过程仅1～2min;在相同压力下,地下滴灌灌水器流量比地表滴灌小5%～20%,压力越大,二者越接近;灌水器流量随工作压力的增加而增大;土壤因素对灌水器流量有微弱的制约作用,使流量减小.相同条件下,土壤质地越轻,灌水器流量越大;但随着土壤容重和土壤初始含水率的增加,土壤质地越轻,流量减小程度越大.
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| 关 键 词： | 地下滴灌 灌水器 土壤质地 水力要素 |
of Different Textural Soils on Hydraulic Characteristics of Emitters under Subsurface Drip Irrigation |
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| Li Gang,Bai Dan,Wang Xiaoyu,Fu Jia.of Different Textural Soils on Hydraulic Characteristics of Emitters under Subsurface Drip Irrigation[J].Transactions of the Chinese Society of Agricultural Machinery,2009,40(2):58-62. |
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| Authors: | Li Gang Bai Dan Wang Xiaoyu Fu Jia |
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| Institution: | Key Lab of Northwest Water Resources and Environment Ecology;Ministry of Education;Xi'an University of Technology;Xi'an 710048;China |
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| Abstract: | In order to study hydraulic characteristics and their differences of SDI emitter in various textural soils and to analyze effect of soil factors on emitter discharge,the experimental scheme was arranged in the clay,loam and sand soil based on uniform design with mixed levels of three factors that were respectively work pressure of emitter,soil bulk density and soil initial water content.The results show that the rules of emitter discharges in three textural soils are the same.The discharge of SDI emitter is... |
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| Keywords: | Subsurface drip irrigation Emitter Soil texture Hydraulic characteristics |
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