Nitrogen supply determines responses of yield and biomass partitioning of perennial ryegrass to elevated atmospheric carbon dioxide concentrations

Autor:	U. Schenk, H.‐J. Weigel, Hans-Jürgen Jäger
Rok vydání:	1996
Předmět:	Perennial plant biology Physiology Chemistry fungi food and beverages Biomass chemistry.chemical_element biology.organism_classification Lolium perenne Nitrogen chemistry.chemical_compound Dry weight Agronomy Carbon dioxide Dry matter Biomass partitioning Agronomy and Crop Science
Zdroj:	Journal of Plant Nutrition. 19:1423-1440
ISSN:	1532-4087 0190-4167
Popis:	Perennial ryegrass (Lolium perenne L. cv. Parcour) grown at eight levels of nitrogen (N) fertilization (0–765 mg/pot) was exposed to ambient (390 ppm) and elevated (690 ppm) carbon dioxide (CO2) concentrations for 83 days. Plants were cut three times and dry matter yields determined for each harvest. At final harvest, dry weight of root and stubble biomass was determined, as N concentrations of all plant fractions were determined. Carbon dioxide enrichment effects on yield and total plant biomass increased with increasing N fertilization. The weaker CO2‐related yield enhancement at low N supply was due to the plants inability to increase tiller number. Root fraction of total plant biomass at final harvest was increased by high CO2 and decreased by N supply. Root biomass was significantly increased by CO2 enrichment and for both CO2 treatments the N supply for maximum root mass coincided with the N supply for reaching maximum total plant biomass. A significant correlation between root fraction of ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d84ac7aaf4613e7c8d92c42ab9c0ed00 https://doi.org/10.1080/01904169609365210 Zobrazit plný text záznamu