caa a22 4500 445837985 CHVBK 20180317145335.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00271-010-0221-9 doi (NATIONALLICENCE)springer-10.1007/s00271-010-0221-9 A modified checkbook irrigation method based on GIS-coupled model for regional irrigation scheduling [Elektronische Daten] [Xiaopeng Li, Jiabao Zhang, Jintao Liu, Jianli Liu, Anning Zhu, Fei Lv, Congzhi Zhang] In this study, a regional irrigation schedule optimization method was proposed and applied in Fengqiu County in the North China Plain, which often suffers serious soil water drainage and nitrogen (N) leaching problems caused by excessive irrigation. The irrigation scheduling method was established by integrating the ‘checkbook irrigation method' into a GIS-coupled soil water and nitrogen management model (WNMM) as an extension. The soil water and crop information required by the checkbook method, and previously collected from field observations, was estimated by the WNMM. By replacing manually observed data with simulated data from WNMM, the application range of the checkbook method could be extended from field scale to regional scale. The WNMM and the checkbook irrigation method were both validated by field experiments in the study region. The irrigation experiment in fluvo-aquic soil showed that the checkbook method had excellent performance; soil water drainage and N leaching were reduced by 83.1 and 85.6%, respectively, when compared with local farmers' flood irrigation. Using the validated WNMM, the performance of checkbook irrigation in an entire winter wheat and summer maize rotation was also validated: the average soil water drainage and N leaching in four types of soils decreased from 331 to 75mmyear−1 and 47.7 to 9.3kgha−1year−1, respectively; and average irrigation water use efficiency increased from 26.5 to 57.2kgha−1mm−1. The regional irrigation schedule optimization method based on WNMM was applied in Fengqiu County. The results showed a good effect on saving irrigation water, decreasing soil water drainage and then saving agricultural inputs. In a typical meteorological year, it could save>110mm of irrigation water on average, translating to >7.26×107 m3 of agricultural water saved each year within the county. Annual soil water drainage was reduced to <143mm and N leaching to <27kgha−1 in most soils, all of which were significantly lower than local farmers' flood irrigation. In the mean time, crop yield also had an average increase of 2,890kgha−1 when checkbook irrigation was applied. Springer-Verlag, 2010 Li Xiaopeng State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Zhang Jiabao State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Liu Jintao State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Liu Jianli State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Zhu Anning State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Lv Fei State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Zhang Congzhi State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut Irrigation Science Springer-Verlag 29/2(2011-03-01), 115-126 0342-7188 29:2<115 2011 29 271 https://doi.org/10.1007/s00271-010-0221-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00271-010-0221-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xiaopeng State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Zhang Jiabao State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Liu Jintao State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Liu Jianli State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Zhu Anning State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Lv Fei State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 700 1- Zhang Congzhi State Key Laboratory of Soil and Sustainable Agriculture, State Experimental Station of Agro-Ecosystem in Fengqiu, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China aut NATIONALLICENCE 773 0- Irrigation Science Springer-Verlag 29/2(2011-03-01), 115-126 0342-7188 29:2<115 2011 29 271 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer