王学春,李军,任晶晶.长武旱塬不同麦玉轮作系统产量效应模拟研究[J].干旱地区农业研究,2010,28(3):71~78
长武旱塬不同麦玉轮作系统产量效应模拟研究
College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China; Institute of Soil and Water Conservation, CAS & MWR, Yangling , Shaanxi 712100, China
  
DOI：10.7606/j.issn.1000-7601.2010.03.13
中文关键词:  轮作  EPIC模型  产量  长武旱塬
英文关键词:rotation system  EPIC model  crop yield  Changwu arid-plateau
基金项目:国家自然科学基金资助项目(40371077,30471024)
作者单位
王学春 西北农林科技大学农学院,陕西 杨凌 712100 
李军 西北农林科技大学农学院,陕西 杨凌 712100； 中国科学院,水利部水土保持研究所,陕西 杨凌 712100 
任晶晶 西北农林科技大学农学院,陕西 杨凌 712100 
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中文摘要:
      利用EPIC模型对不同麦玉轮作系统进行模拟,通过对其输出结果的分析,综合考虑产量、经济效益、干旱胁迫和氮肥生产率等因素,对不同麦玉轮作系统进行综合评价,从而比较不同麦玉轮作系统的优劣。结果表明:(1)在模拟研究期间,8种麦玉轮作系统的产量均呈波动性下降趋势,其平均值分别为4.61、4.40、4.16、4.48、4.28、4.29、4.714、.55 t/hm2。所有的麦玉轮作系统中,麦玉轮作系统“春玉米→冬小麦”的经济效益最好。(2)在模拟研究期间,麦玉轮作系统“春玉米→冬小麦→冬小麦”的冬小麦和春玉米所遭受的年均干旱胁迫日数最少(29.51d)。在干旱年份麦玉轮作系统中的冬小麦较春玉米更容易遭受干旱威胁。综合产量、经济效益、作物所遭受的干旱胁迫天数和麦玉轮作系统的氮肥生产率等因素,在长武地区适宜采用的麦玉轮作系统为春玉米→冬小麦。
英文摘要:
      Simulation results of EPIC model were analysed after the simulation of different rotation sequences. Con- sidering grain yield, economic benefit, water stress days and productivity rate of N fertilizer generally, different rotation sequences were assessed, then the advantage and disadvantage were compared. The results showed that:(1) The average grain yield of 8 rotation sequences was 4.61, 4. 40, 4.16, 4.48, 4.28, 4.29, 4.71 and 4.55 t/hm2 respectively and a downward trend appeared during the simulation period. Considering economic benefit, spring maize-winter wheat was the best rotation sequence. (2) Water stress days, suffered by spring maize and winter wheat, of R2 (spring maize-win-ter wheat-winter wheat) was the least (29.51 days average) among 8 rotation sequences. Winter wheat was more suscep-tible to water stress than spring maize in the rotation system. The value of productivity efficiency of N fertilizer in R1(spring maize-winter wheat) was the greatest among all rotation sequences. Taking grain yield, economic benefit, water stress days and productivity rate of N fertilizer into account , the appropriate rotation sequence was R1 ( spring maize-win-ter wheat) on Changwu arid-plateau.
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