| 引用本文: | 宋时雨,杨昊霖,许文其,等.微润灌溉系统在云南红壤土中主要工作性能研究[J].灌溉排水学报,,():16-23. |
| SONG Shiyu,YANG Haolin,XU Wenqi,et al.微润灌溉系统在云南红壤土中主要工作性能研究[J].灌溉排水学报,,():16-23. |
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| 摘要: |
| 【目的】探究微润灌溉系统的主要工作性能，为该灌溉系统在云南红壤土中的使用提供理论依据。【方法】针对云南红壤土，通过测定土壤剖面含水率，开展了灌水压力和灌水器埋深对土壤水分分布规律影响试验；根据作物正常生长所需要的土壤含水率下限，进行了微润灌溉系统浸润宽度以及微润管各种植位置上作物的生长试验研究。【结果】灌水压力、微润管埋深和灌溉时长对单位微润管出流量有显著影响（P<0.05）。经微润管渗出的灌溉水在红壤土中形成的湿润体剖面近似为椭圆形，其剖面面积随灌水压力和埋深的增加而增大。不同灌溉时长条件下，红壤土中的微润管不同位置处浸润宽度呈现“中段大、两端小”的趋势，中段处的浸润宽度比两端处增大15.0%～33.6%；微润灌溉系统工作2周后，浸润宽度趋于稳定，浸润宽度范围平均值为0.92～1.18 m，在作物生长试验中，采集线上4种作物的株高、茎粗、鲜质量和干质量均呈现“中段大、两端小”的趋势。【结论】在0.025 MPa灌溉压力和0.15 m灌水器埋深条件下，作物的种植位置越靠近微润管，其长势越好。 |
| 关键词: 微润灌溉； 云南红壤土； 出流量； 土壤水分分布； 浸润范围 |
| DOI：10.13522/j.cnki.ggps.2017.0453 |
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| Main Performance of Moistube-irrigation System in the Yunnan Red Loam |
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SONG Shiyu, YANG Haolin, XU Wenqi, ZHANG Yijie, YU Yang
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College of Mechanical and Electrical Engineering，Yunnan Agricultural University， Kunming 650201， China
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| Abstract: |
| 【Objective】 Research the main performances of moistube-irrigation system and provide the theoretical basis for moistube-irrigation technology in Yunnan red loam. 【Method】 Aimed at the Yunnan red loam, the effects of the irrigation pressure and the depth of moistube on soil moisture distribution and the wetting width of micro-irrigation system, which according to the lower limit of soil moisture content required for normal growth of crops, were studied and the growth of crops in different planting locations and acquisition lines were researched. 【Result】 There was a very significant interaction between the irrigation pressure and depth for flow (P<0.05). Wetted body was formed in the red loam and its cross-section was approximately oval when the irrigation water discharged through the moistube. The cross-section area enlarged with the increase of irrigation pressure and depth. Under the condition of different irrigation times, the width of infiltration at different positions of moistube showed the trend of “larger in the middle and smaller on both ends”, which was raised by 15.0%~33.6% in the middle section than those on both ends; After two weeks operation, the width of infiltration of moistube-irrigation system was tended to stabilize, and the average value of it ranged from 0.92 to 1.18 m. In crop growth test, the trend of crops’ height, stem diameter, fresh and dry weight of four kinds of crops showed the trend of “larger in the middle and smaller on both ends” on different acquisition lines. These results were in agreement with the result of the infiltration width test. 【Conclusion】 Under the conditions of 0.025 MPa irrigation pressure and the depth of 0.15 m, the closer the planting position of the crops, the better the growth of the crops. |
| Key words: Moistube-irrigation; Yunnan red loam; flow; soil moisture distribution; infiltrating range |
