{"title":"田间小麦水分胁迫与水分利用效率:与C4植株的比较","authors":"P.K. Aggarwal, S.K. Sinha","doi":"10.1016/0002-1571(83)90063-8","DOIUrl":null,"url":null,"abstract":"<div><p>Two cultivars of wheat, contrasting in their drought resistance characteristics, were grown under irrigated and non-irrigated conditions in the field for two seasons. The water-use efficiency (<em>WUE</em>) ranged from 0.5 to 13.8 g dry matter kg<sup>−1</sup> water used depending upon the growth stage, cultivar and water stress. The average <em>WUE</em> for the season was between 3.34 and 4.70 g dry matter kg<sup>−1</sup> water used. Regression analysis indicated that <em>WUE</em> was a function of dry matter produced and had no direct statistical relationship with the weather parameter. The <em>WUE</em> of plants having the C<sub>3</sub> system of photosynthesis, like wheat, need not be poorer than the plants with the C<sub>4</sub> system if comparisons are made of plants growing in their respective preferred ecological niches. Various possible reasons for the low values of <em>WUE</em> reported for C<sub>3</sub> plants are discussed.</p></div>","PeriodicalId":100061,"journal":{"name":"Agricultural Meteorology","volume":"29 3","pages":"Pages 159-167"},"PeriodicalIF":0.0000,"publicationDate":"1983-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0002-1571(83)90063-8","citationCount":"8","resultStr":"{\"title\":\"Water stress and water-use efficiency in field grown wheat: A comparison of its efficiency with that of C4 plants\",\"authors\":\"P.K. Aggarwal, S.K. Sinha\",\"doi\":\"10.1016/0002-1571(83)90063-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Two cultivars of wheat, contrasting in their drought resistance characteristics, were grown under irrigated and non-irrigated conditions in the field for two seasons. The water-use efficiency (<em>WUE</em>) ranged from 0.5 to 13.8 g dry matter kg<sup>−1</sup> water used depending upon the growth stage, cultivar and water stress. The average <em>WUE</em> for the season was between 3.34 and 4.70 g dry matter kg<sup>−1</sup> water used. Regression analysis indicated that <em>WUE</em> was a function of dry matter produced and had no direct statistical relationship with the weather parameter. The <em>WUE</em> of plants having the C<sub>3</sub> system of photosynthesis, like wheat, need not be poorer than the plants with the C<sub>4</sub> system if comparisons are made of plants growing in their respective preferred ecological niches. Various possible reasons for the low values of <em>WUE</em> reported for C<sub>3</sub> plants are discussed.</p></div>\",\"PeriodicalId\":100061,\"journal\":{\"name\":\"Agricultural Meteorology\",\"volume\":\"29 3\",\"pages\":\"Pages 159-167\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1983-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0002-1571(83)90063-8\",\"citationCount\":\"8\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Agricultural Meteorology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0002157183900638\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agricultural Meteorology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0002157183900638","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Water stress and water-use efficiency in field grown wheat: A comparison of its efficiency with that of C4 plants
Two cultivars of wheat, contrasting in their drought resistance characteristics, were grown under irrigated and non-irrigated conditions in the field for two seasons. The water-use efficiency (WUE) ranged from 0.5 to 13.8 g dry matter kg−1 water used depending upon the growth stage, cultivar and water stress. The average WUE for the season was between 3.34 and 4.70 g dry matter kg−1 water used. Regression analysis indicated that WUE was a function of dry matter produced and had no direct statistical relationship with the weather parameter. The WUE of plants having the C3 system of photosynthesis, like wheat, need not be poorer than the plants with the C4 system if comparisons are made of plants growing in their respective preferred ecological niches. Various possible reasons for the low values of WUE reported for C3 plants are discussed.
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