排灌机械工程学报
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排灌机械工程学报  2018, Vol. 36 Issue (11): 1087-1091    DOI: 10.3969/j.issn.1674-8530.18.1147
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基于DNDC模型的北京市大兴区冬小麦农业用水效率
乔帅帅1,2,3, 魏征1,2*, 张宝忠1,2, 胡振华3
1.国家节水灌溉北京工程技术研究中心, 北京 100048; 2.中国水利水电科学研究院流域水循环模拟与调控国家重点实验室, 北京 100038; 3.山西农业大学林学院, 山西 太谷 030801
Water use efficiency of winter wheat based on DNDC model in Daxing District Beijing
QIAO Shuaishuai1,2,3, WEI Zheng1,2*, ZHANG Baozhong1,2, HU Zhenhua3
1.National Center of Efficient Irrigation Engineering and Technology Research-Beijing, Beijing 100048, China; 2.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 3.College of Forestry, Shanxi Agricultural University, Taigu, Shanxi 030801, China
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摘要 为了阐明大兴区冬小麦农业用水效率时空变化趋势, 基于近10 a大兴区冬小麦产量统计值和遥感ET值, 构建了冬小麦脱氮-分解作用模型(DNDC模型), 验证了DNDC模型在区域冬小麦水分生产率方面的适用性.结果表明:点位模拟与验证中,冬小麦产量和ET值模拟效果较好,相对误差均小于4.20%,作物水分生产率WP点位模拟值分别为1.91和1.75 kg/m3.区域模拟与验证中,不同土壤区冬小麦产量及ET不尽相同,但总体趋势保持一致,产量随降雨量变化较大,2008年产量达到最大.2007—2016年产量统计平均值为5 227 kg/hm2,产量模拟平均值为4 845 kg/hm2;同期区域冬小麦ET模拟平均值为381.74 mm,遥感平均值为392.66 mm,产量和ET平均相对误差小于13%.2007—2016年WP模拟值为1.10~1.62 kg/m3,平均值为1.27 kg/m3,统计值为1.15~1.62 kg/m3,统计平均值为1.34 kg/m3.
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乔帅帅
魏征
*
张宝忠
胡振华
关键词作物水分生产率   冬小麦   脱氮-分解作用模型   产量   蒸发蒸腾量   用水效率   大兴区     
Abstract: In order to elucidate the spatial-temporal variation trend of agricultural water efficiency in winter wheat in Daxing District, a DNDC(denitrification and decomposition)model of winter wheat was worked out based on winter wheat yield statistics and remote sensing ET values in the district. The applicability of the model was verified to the water productivity of winter wheat in the district. It was shown that the simulated winter wheat yield and ET were in better accuracy as low as less than 4.2% relative error, and the water productivity of the plant was 1.91 and 1.75 kg/m3, respectively. In regional simulation and verification, the yield and ET of winter wheat in different soil areas varied, but the same overall trend remained. The yield depended largely on rainfall, and reached the maximum in 2008. The average annual yield in 2007—2016 was 5 227 kg/hm2, and the simulated average yield was 4 845 kg/hm2. During the same period, the average value of ET simulated in the district was 381.74 mm, and the average value from remote sensing was 392.66 mm with a less than 13% average relative error. The WP value simulated was in 1.10-1.62 kg/m3 in 2007 to 2016 with a mean of 1.27 kg/m3, while the statistic value was in 1.15-1.62 kg/m3 with a statistic mean of 1.34 kg/m3.
Key wordscrop water productivity   winter wheat   DNDC model   yield   evaporation transpiration   water use efficiency   Daxing   
收稿日期: 2018-05-04;
基金资助:

国家自然科学基金资助项目(51479210);水利部公益性行业科研专项(201501017)

引用本文:   
乔帅帅,,魏征等. 基于DNDC模型的北京市大兴区冬小麦农业用水效率[J]. 排灌机械工程学报, 2018, 36(11): 1087-1091.
QIAO Shuai-Shuai-,,WEI Zheng- et al. Water use efficiency of winter wheat based on DNDC model in Daxing District Beijing[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(11): 1087-1091.
 
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