干旱区生态环境知识资源中心(Arid): 不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟

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	不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟
其他题名	Simulation of Winter Wheat Growth under Different Scenarios of Water Stress with RZWQM2 Model
	蒋腾聪 1; 窦子荷 1; 姚宁 1; 冯浩 2; 于强 3; 何建强 1
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2018
卷号	49 期号:7 页码:205-216
中文摘要	为提高水分胁迫条件下作物生长过程的模拟精度,根区水质模型(Root zone water quality model 2,RZWQM2)的开发者改进了原有的水分胁迫指标(Soil water index 1,WSI1)得到2种新的水分胁迫指标WSI2和WSI3。其中,WSI2用Nimah and Hanks方程修正影响光合作用的胁迫系数(Soil water factor,SWFAC)中的根系吸水项;WSI3则在WSI2的基础上加入了土壤蒸发项。为比较上述3种水分胁迫指标模拟水分胁迫条件下冬小麦生长发育的精度,并对其在关中地区的适用性进行评价,首先利用2012-2013年和2013-2014年两年度的冬小麦分段受旱试验对RZWQM2模型进行校准和验证,然后分别选取模型中3种不同的水分胁迫因子对2年(2012-2014年)分段受旱试验进行模拟,评价冬小麦的土壤水分动态、蒸腾总量、最终生物量和籽粒产量的模拟效果。结果表明:3种水分胁迫因子能较好地模拟生育后期轻度受旱条件下冬小麦的生长发育过程,但随着受旱程度的加深和受旱时段的提前,模型的模拟精度降低;相较原有水分胁迫因子WSI1,WSI2提高了各受旱处理的模拟精度,其中2年生物量的平均RRMSE降低了2.84个百分点,籽粒产量的平均ARE降低了1.43个百分点,且在越冬期和拔节期受旱处理的模拟精度提高最为明显。综上,现有RZWQM2模型对冬小麦受旱处理的模拟还存在一定局限性,可从改善物候期和ET模拟精度及加入旱后复水对冬小麦生长的补偿效应等方面进一步研究和改进。如需利用现有模型对水分胁迫条件下冬小麦生长发育过程进行模拟,建议选用WSI2。
英文摘要	Aiming to improve its ability to simulate crop growth and yield under different scenarios of soil water stress,the current stress factors of water stress index 1(WSI1) was modified and two more different indices of WSI2 and WSI3 were created for the root zone water quality model(RZWQM2).The index of WSI2 was based on a modification of the soil water factor(SWFAC) for photosynthesis-related processes in RZWQM2 using daily potential root water uptake calculated by the Nimah and Hanks approach.The index of WSI3 was based on WSI2 but with new terms accounting for the stress due to additional heating of the canopy by unused energy for potential soil evaporation in both the supply and demand terms of WSI2.The RZWQM2 model and these three different water stress indices were evaluated by using the data of soil water,total transpiration,biomass and grain yield obtained from a winter wheat experiment conducted under different water stress scenarios at different growing stages in two consecutive growth seasons of 2012-2013 and 2013-2014.The results showed that these three water stress indices were all able to correctly simulate the dynamic changes of winter wheat growth and soil water content when water stress occurred during the heading and grain-filling stages.However,when water stress occurred earlier and severer,the simulation accuracy became lower.Generally,the water stress index of WSI2 was better than WSI1 under different scenarios,since the relative root mean square error(RRMSE) for biomass was decreased by 2.84 percentage point,and the absolute relative error(ARE) for yield was decreased by 1.43 percentage point,especially when water stress occurred during the wintering and greening stages.In general,there were still some limitations for the RZWQM2 model to simulate winter wheat growth under arid conditions.Thus,the RZWQM2 model can be further improved in the following aspects,such as the response of phenology to soil water stress,the improvement of ET simulation,and the compensation effect of rehydration on winter wheat after long water stress.It was suggested that model users should choose WSI2,if the RZWQM2 model was expected to simulate the response of winter wheat to soil water stress.
中文关键词	冬小麦 ; 作物模型 ; 水分胁迫 ; RZWQM2模型 ; 生长发育 ; 土壤水分
英文关键词	winter wheat crop model water stress RZWQM2 model growth and development soil water
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:6279324
来源机构	西北农林科技大学 ; 中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238010
作者单位	1.西北农林科技大学;;西北农林科技大学中国旱区节水农业研究院, 旱区农业水土工程教育部重点实验室;;, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国; 2.西北农林科技大学中国旱区节水农业研究院;;中国科学院水利部水土保持研究所, ;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌;;杨凌, 陕西;;陕西 712100;;712100, 中国; 3.中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	蒋腾聪,窦子荷,姚宁,等. 不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟[J]. 西北农林科技大学, 中国科学院水利部水土保持研究所,2018,49(7):205-216.
APA	蒋腾聪,窦子荷,姚宁,冯浩,于强,&何建强.(2018).不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟.农业机械学报,49(7),205-216.
MLA	蒋腾聪,et al."不同水分胁迫情境下冬小麦生长发育的RZWQM2模拟".农业机械学报 49.7(2018):205-216.