Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10584-018-2170-x |
Impacts of rainfall extremes on wheat yield in semi-arid cropping systems in eastern Australia | |
Feng, Puyu1,2; Wang, Bin2; Liu, De Li2,3,4; Xing, Hongtao1,2; Ji, Fei5; Macadam, Ian3,4; Ruan, Hongyan6; Yu, Qiang1,7,8 | |
通讯作者 | Yu, Qiang |
来源期刊 | CLIMATIC CHANGE
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ISSN | 0165-0009 |
EISSN | 1573-1480 |
出版年 | 2018 |
卷号 | 147期号:3-4页码:555-569 |
英文摘要 | Investigating the relationships between climate extremes and crop yield can help us understand how unfavourable climatic conditions affect crop production. In this study, two statistical models, multiple linear regression and random forest, were used to identify rainfall extremes indices affecting wheat yield in three different regions of the New South Wales wheat belt. The results show that the random forest model explained 41-67% of the year-to-year yield variation, whereas the multiple linear regression model explained 34-58%. In the two models, 3-month timescale standardized precipitation index of Jun.-Aug. (SPIJJA), Sep.-Nov. (SPISON), and consecutive dry days (CDDs) were identified as the three most important indices which can explain yield variability for most of the wheat belt. Our results indicated that the inter-annual variability of rainfall in winter and spring was largely responsible for wheat yield variation, and pre-growing season rainfall played a secondary role. Frequent shortages of rainfall posed a greater threat to crop growth than excessive rainfall in eastern Australia. We concluded that the comparison between multiple linear regression and machine learning algorithm proposed in the present study would be useful to provide robust prediction of yields and new insights of the effects of various rainfall extremes, when suitable climate and yield datasets are available. |
类型 | Article |
语种 | 英语 |
国家 | Australia ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000428427200013 |
WOS关键词 | CLIMATE-CHANGE ; RANDOM FORESTS ; VARIABILITY ; TRENDS ; EMERGENCE ; DROUGHT ; WEATHER |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
来源机构 | 西北农林科技大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208439 |
作者单位 | 1.Univ Technol Sydney, Sch Life Sci, Fac Sci, POB 123, Sydney, NSW 2007, Australia; 2.Wagga Wagga Agr Inst, NSW Dept Primary Ind, Wagga Wagga, NSW 2650, Australia; 3.Univ New South Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia; 4.Univ New South Wales, ARC Ctr Excellence Climate Syst Sci, Sydney, NSW 2052, Australia; 5.NSW Off Environm & Heritage, Queanbeyan, Australia; 6.Guangxi Univ, Coll Agr, Nanning 530000, Guangxi, Peoples R China; 7.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 8.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Feng, Puyu,Wang, Bin,Liu, De Li,et al. Impacts of rainfall extremes on wheat yield in semi-arid cropping systems in eastern Australia[J]. 西北农林科技大学,2018,147(3-4):555-569. |
APA | Feng, Puyu.,Wang, Bin.,Liu, De Li.,Xing, Hongtao.,Ji, Fei.,...&Yu, Qiang.(2018).Impacts of rainfall extremes on wheat yield in semi-arid cropping systems in eastern Australia.CLIMATIC CHANGE,147(3-4),555-569. |
MLA | Feng, Puyu,et al."Impacts of rainfall extremes on wheat yield in semi-arid cropping systems in eastern Australia".CLIMATIC CHANGE 147.3-4(2018):555-569. |
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