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Effects of bubbled-root irrigation interference infiltration on transport characteristics of water and nitrogen |
LIU Xian, FEI Liangjun, LIU Yang |
Institute of Water Resources and Hydro-electric Engineering, Xi′an University of Technology, Xi′an, Shaanxi 710048, China |
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Abstract To improve the water and fertilizer utilization efficiency of bubbled-root irrigation, in this paper, experiments are carried out on field fertilizer infiltration to identify wetting front migration, wetting volume, soil water and nitrogen distribution in different distances between emitters(30, 40, 50, 60 cm). Results show that the distance between emitters has a great influence on the migration distance of wetting front and wet volume. With increasing distance between emitters, the maximum horizontal wetting distance and wet volume both are large, but the migration distance of wetting front and intersection time all decrease. After the irrigation, the soil moisture and NH+4-N content are the highest under the emitters and higher at the intersection. As redistribution continuing, the wetting front migration and wet volume increase, and NH+4-N content in the volume rises gradually. The redistribution for 1 day, the wetted body basically reaches steady state; for 5 days, the NH+4-N content achieves the maximum. Within 15 days of observation, the NO-3-N content is always in a steadily increasing state. The above results will lay a foundation for a better use efficiency of nitrogen and water in bubbled-root irrigation.
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Received: 31 May 2016
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[1]吴普特,朱德兰,汪有科.涌泉根灌技术研究与应用[J].排灌机械工程学报,2010,28(4):354-357. WU Pute, ZHU Delan, WANG Youke. Research and application of bubbled-root irrigation [J]. Journal of drainage and irrigation machinery engineering, 2010, 28(4): 354-357.(in Chinese)[2]MADRAMOOTOO C A, JANE M. Advances and challenges with micro-irrigation[J]. Irrigation & drainage, 2013, 62(62): 255-261.[3]HANSON B, MAY D. Effect of subsurface drip irrigation on processing tomato yield, water table depth, soil salinity, and profitability[J]. Agricultural water management, 2004, 68(1): 1-17.[4]王维娟,牛文全,孙艳琦,等.滴头间距对双点源交汇入渗影响的模拟研究[J].西北农林科技大学学报(自然科学版),2010,38(4):219-225. WANG Weijuan, NIU Wenquan, SUN Yanqi, et al. Simulation study on the effects of dripper spacing on soil water infiltration conditions under surface drip irrigation with two point-source emitter [J]. Journal of Northwest A&F University(natural science edition), 2010,38(4): 219-225.(in Chinese)[5]魏群,费良军.不同灌水技术要素对地表滴灌交汇入渗特性的影响[J].干旱地区农业研究,2011,29(3):29-34. WEI Qun, FEI Liangjun. Research on interference infiltration characteristic test of surface drip irrigation [J]. Agricultural research in the arid areas, 2011,29(3): 29-34.(in Chinese)[6]BHATNAGAR P R, CHAUHAN H S. Soil water movement under a single surface trickle source[J]. Agricultural water management, 2008, 95(7): 799-808.[7]COTE C M, BRISTOW K L, CHARLESWORTH P B, et al. Analysis of soil wetting and solute transport in subsurface trickle irrigation[J]. Irrigation science, 2003, 22(3/4): 143-156.[8]SKAGGS T H, TROUT T J, ROTHFUSS Y. Drip irrigation water distribution patterns: effects of emitter rate, pulsing, and antecedent water[J]. Soil science society of America journal, 2010, 74(6): 1886-1896.[9]李耀刚,王文娥,胡笑涛.基于HYDRUS-3D的涌泉根灌土壤入渗数值模拟[J],排灌机械工程学报,2013,31(6):546-552. LI Yaogang,WANG Wene,HU Xiaotao. Numerical simulation of soil water infiltration under bubbled root irrigation based on HYDRUS-3D[J], Journal of drainage and irrigation machinery engineering,2013,31(6):546-552.(in Chinese)[10]程慧娟,王全九,曾辰,等.垂直线源灌溉条件下交汇入渗特性研究[J].灌溉排水学报,2010,29(4):63-66. CHENG Huijuan, WANG Quanjiu, ZENG Chen, et al. Intersection infiltration characteristics of vertical line source irrigation [J]. Journal of irrigation and drainage, 2010,29(4): 63-66.(in Chinese)[11]吴恒卿,黄强,魏群.涌泉根灌双点源交汇入渗湿润体试验研究[J].西北农林科技大学学报(自然科学版),2015,43(5):201-207. WU Hengqing, HUANG Qiang, WEI Qun. Moist body of two-point source interference infiltration of surge root irrigation[J]. Journal of Northwest A&F University(natural science edition), 2015,43(5): 201-207.(in Chinese)[12]脱云飞,王克勤,宋维峰,等.膜孔肥液自由入渗土壤水氮运移转化的数值模拟[J].水力发电学报,2013, 32(4):57-63. TUO Yunfei, WANG Keqin, SONG Weifeng, et al. Numerical simulation of transport and transform of soil moisture and nitrogen under film hole infiltration with fertilizer [J]. Journal of hydroelectric engineering, 2013, 32(4): 57-63.(in Chinese)[13]郑彩霞,张富仓,贾运岗,等.不同滴灌量对土壤水氮运移规律研究[J].水土保持学报,2014,28(6):167-170. ZHENG Caixia, ZHANG Fucang, JIA Yungang, et al. Experimental study on soil water and nitrogen migration law under different drip fertilization[J]. Journal of soil and water conservation, 2014, 28(6): 167-170.(in Chinese)[14]费良军,傅渝亮,何振嘉,等.涌泉根灌肥液入渗水氮运移特性研究[J].农业机械学报,2015, 46(6):121-129. FEI Liangjun, FU Yuliang, HE Zhenjia, et al. Transport characteristics of water and Nitrogen under Bubbled-root irrigation with fertilizer solution[J]. Transactions of the CSAM, 2015, 46(6): 121-129.(in Chinese) |
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