DSSAT模型对豫西冬小麦保护性耕作效应模拟效果验证

鲁向晖; 穆兴民; Vinay Nangia; 隋艳艳; 姚宇卿; 王飞; 高鹏

鲁向晖,穆兴民,Vinay Nangia,隋艳艳,姚宇卿,王飞,高鹏.DSSAT模型对豫西冬小麦保护性耕作效应模拟效果验证[J].干旱地区农业研究,2010,28(3):64~70

DSSAT模型对豫西冬小麦保护性耕作效应模拟效果验证

Validation of the effect of DSSAT model on winter wheat under conservation tillage treatments in west Henan

DOI：10.7606/j.issn.1000-7601.2010.03.12

中文关键词: 保护性耕作冬小麦作物生长产量土壤水分 DSSAT模型

英文关键词:conservation tillage winter wheat crop growth yield soil water DSSAT model

基金项目:Challenge Program on Water&Food“Conservation Agriculture for the Dryland Areas of the Yellow River Basin”(CN228)；“十一五”国家科技支撑计划项目“黄土高原水土流失综合治理工程关键支撑技术研究”(2006BAD09B04)；欧盟DESIRE项目(037046)

作者	单位
鲁向晖	西北农林科技大学,陕西杨凌 712100
穆兴民	西北农林科技大学,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
Vinay Nangia	国际水资源管理研究所,科伦坡 2075
隋艳艳	西北农林科技大学,陕西杨凌 712100
姚宇卿	洛阳市农业科学研究所,河南洛阳 471022
王飞	西北农林科技大学,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
高鹏	中国科学院水利部水土保持研究所,陕西杨凌 712100

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中文摘要:

简要介绍了美国乔治亚大学组织开发的DSSATV4.5模型,并利用洛阳市孟津县20052006年冬小麦田间试验结果对模型的模拟结果进行验证及其适用性分析。通过对冬小麦叶面积指数、产量和农田土壤水分、水分利用效率的模拟与实测结果的对比分析,认为DSSAT模型的模拟效果较好。分析结果表明:模型对叶面积指数的模拟误差RMSE在0.0340.076之间;模拟各处理的产量与水分利用效率也与实测值的关系基本一致;对各处理土壤体积含水量的RMSE误差在0.0510.151之间。研究结果认为DSSAT模型在豫西应用的适宜性较好,可为该地区研究保护性耕作对冬小麦生长及土壤水分的影响提供理论支持。

英文摘要:

Agricultural system models are tools to represent and understand major processes and their interactions in agricultural system. We used the Decision Support System for Agrotechnology Transfer (DSSAT) with four diferent tillage treatments data from a study in west Henan of China to evaluate winter wheat yield, leaf area index and water balance. The model was calibrated using the data of field experiment. The site had a winter wheat-fallow-winter wheat rotation. The treatments were:(1) decrease tllage (DT), 10~15 cm height straw mulching and once plough 25 cm on 1^st July; (2) zero tillage (ZT), zero tillage with 35~40 cm height straw mulching; (3) subsoiling (SS), 35~40 cm height straw mulching and suboiling 40 cm depth on 1^st July; (4) conventional tillage (CT), 10~15 cm height straw mulching and twice plough 20 cm on 1^st July and 1^st October. DSSAT correctly simulated four tillage treatments variations in winter yield, leaf area index and soil water balance. Winter wheat yield variation was simulated with better satisfaction (the error absolute values was less than 3.95% and the error mean absolute value was 2. 78%). Mean value of root mean square erors (RMSE) for simulated leaf area index (LAI) and soil water storage were 0.41 and 0.084, respectively. The predicted water use efficiency for the four tillage treatments were 15.85, 15.40, 16.58 and 15.81 kg/(mm·hm²), respectively, and these values were close to the measured data (16.82, 14.44, 16.86 and 15 .66 kg/(mm·hm²), respectively). Although the analysis results showed us the DSSAT V4.5 was very well agreement for simulated winter wheat grown in west Henan, however, these preliminary results are based on one year and four tillage treatments dataset and further long term analysis need to be carried out for improving the understanding of the conservation agriculture cropping systems in west Henan, China.

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