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| Assessing the influence of soil spatial variability on water leakage and nitrate leaching and yield |
| WEN Jiangli1,2, LI Jiusheng1*, ZHAO weixia1, LI Yanfeng1 |
| 1.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2.Beijing Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China |
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Abstract We studied the influences of spatial variability of soil properties and precipitation patterns on crop yield and nitrate leaching in the growth stage of maize using the CERES-Maize crop model. The results indicated that the precipitation can damp the effect of soil spatial variability on water lea-kage, nitrate leaching and maize yield. The maize yield, water leakage, and nitrate leaching during a wet year were obviously higher than those during a normal year and a dry year. The precipitation can damp the effect of soil spatial variability on nitrate leaching and on maize yield. The maize yield decreased and the spatial variability of maize yield increased with the increasing of soil spatial variability. It is of importance to consider soil spatial variability in developing water and nitrogen management when the variation coefficient of silt and clay content exceeds 0.2.
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Received: 02 May 2018
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| [1]SIMUNEK J, GENUCHTENB M T, SEJNAC M. Deve-lopment and applications of the HYDRUS and STANMOD software packages and related codes[J]. Vadose zone journal, 2008, 7(2): 587-600.[2]ASADI M E, CLEMENT R S. Evaluation of CERES-maize of DSSAT model to simulate nitrate leaching, yield and soil moisture content under tropical conditions[J]. Journal of food, agricultural & environment, 2003(1): 270-276.[3]HASEGAWA H, DENISON R F. Model predictions of winter rainfall effects on N dynamics of winter wheat rotation following legume cover crop or fallow[J]. Field crops research, 2005, 91: 251-261.[4]王珍,李久生,栗岩峰.土壤空间变异对滴灌水氮淋失风险影响的模拟评估[J]. 水利学报,2013,44(3):302-311. WANG Zhen, LI Jiusheng, LI Yanfeng. Assessing the influence of soil spatial variability on water leakage and nitrate leaching under drip irrigation through simulation[J]. Journal of hydraulic engineering, 2013, 44(3): 302-311.(in Chinese)[5]USOWICZ B, LIPIEC J. Spatial variability of soil pro-perties and cereal yield in a cultivated field on sandy soil[J]. Soil & tillage research, 2017, 174: 241-250.[6]温江丽.大型喷灌机水肥管理对农田水氮动态及玉米生长的影响[D].北京:中国水利水电科学研究院,2015.[7]DETTORI M,CESARACCIO C,MOTRONI A,et al. Using CERES-wheat to simulate durum wheat production and phenology in Southern Sardinia,Italy[J]. Field crops research, 2011, 120: 179-188.[8]ASABE Standards. ANSI/ASAE S436.1 Test Procedure for Determining the Uniformity of Water Distribution of Center Pivot and Lateral Move Irrigation Machines Equipped with Spray or Sprinkler Nozzles[S]. ASABE. St. Joseph, MI, 2012.[9]YANG J Y, GREENWOOD D J, ROWELL D L, et al. Statistical methods for evaluating a crop nitrogen simulation model, N-ABLE[J]. Agricultural systems, 2000, 64: 37-53.[10]朱陆陆.蒙特卡洛方法及应用[D].武汉:华中师范大学,2014. |
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