Effects of Drought and Heat on Photosynthetic Performance, Water Use and Yield of Two Selected Fiber Hemp Cultivars at a Poor-Soil Site in Brandenburg (Germany)

dc.bibliographicCitation.firstPage1361eng
dc.bibliographicCitation.issue9eng
dc.bibliographicCitation.journalTitleAgronomyeng
dc.bibliographicCitation.volume10eng
dc.contributor.authorHerppich, Werner B.
dc.contributor.authorGusovius, Hans-Jörg
dc.contributor.authorFlemming, Inken
dc.contributor.authorDrastig, Katrin
dc.date.accessioned2021-07-23T07:08:33Z
dc.date.available2021-07-23T07:08:33Z
dc.date.issued2020
dc.description.abstractHemp currently regains certain importance as fiber, oil and medical crop not least because of its modest requirements of biocides, fertilizer and water. During recent years, crops were exposed to a combination of drought and heat, even in northern Central-Europe. Dynamic responses of photosynthesis and stomatal conductance to these stresses and their persistent effects had been studied, if at all, in controlled environment experiments. Comprehensive field studies on diurnal and long-term net photosynthesis and gas exchange, and yield properties of hemp during a drought prone, high-temperature season in northern Central-Europe are obviously missing. Thus, in whole season field trails, the essential actual physiological (rates of net photosynthesis and transpiration, stomatal conductance, water use efficiencies, ambient and internal CO2 concentrations) and the yield performance of modern high-yielding multi-purpose hemp cultivars, ‘Ivory’ and ‘Santhica 27’, were evaluated under extreme environmental conditions and highly limited soil water supply. This provides comprehensive information on the usability of these cultivars under potential future harsh production conditions. Plants of both cultivars differentially cope with the prevailing climatic and soil water conditions. While ‘Ivory’ plants developed high rates of CO2 gain and established large leaf area per plant in the mid-season, those of ‘Santhica 27’ utilized lower CO2 uptake rates at lower leaf area per plant most time. This and the higher germination success of ‘Santhica 27’ resulted in nearly twice the yield compared to ‘Ivory’. Although stomatal control of CO2 gain was pronounced in both cultivars, higher stomatal limitations in ‘Ivory’ plants resulted in higher overall intrinsic water use efficiency. Cultivation of both hemp cultivars with only basic irrigation during seed germination was successful and without large effects on yield and quality. This was valid even under extremely hot and dry climatic conditions in northern Central Europe.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/6330
dc.identifier.urihttps://doi.org/10.34657/5377
dc.language.isoengeng
dc.publisherBasel : MDPIeng
dc.relation.doihttps://doi.org/10.3390/agronomy10091361
dc.relation.essn2073-4395
dc.rights.licenseCC BY 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subject.ddc630eng
dc.subject.ddc640eng
dc.subject.otherClimate changeeng
dc.subject.otherIntrinsic water use efficiencyeng
dc.subject.otherStomatal conductanceeng
dc.subject.otherStomatal limitationseng
dc.subject.otherTranspirationeng
dc.subject.otherWater productivityeng
dc.titleEffects of Drought and Heat on Photosynthetic Performance, Water Use and Yield of Two Selected Fiber Hemp Cultivars at a Poor-Soil Site in Brandenburg (Germany)eng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorATBeng
wgl.subjectUmweltwissenschafteneng
wgl.typeZeitschriftenartikeleng
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