Zobrazeno 1 - 10
of 22
pro vyhledávání: '"H. W. Polley"'
Publikováno v:
International Journal of Agronomy, Vol 2012 (2012)
Increasing global atmospheric carbon dioxide (CO2) concentration has led to concerns regarding its potential effects on terrestrial ecosystems and the long-term storage of carbon (C) and nitrogen (N) in soil. This study examined responses to elevated
Externí odkaz:
https://doaj.org/article/64aa6777bc254ed691c535ba71b3d8a7
Autor:
Jerry L. Hatfield, Roberto C. Izaurralde, Jack A. Morgan, Philip A. Fay, Allison M. Thomson, H. W. Polley
Publikováno v:
Agronomy Journal. 103:371-381
Projections of temperature and precipitation patterns across the United States during the next 50 years anticipate a 1.5 to 2°C warming and a slight increase in precipitation as a result of global climate change. There have been relatively few studi
Publikováno v:
The Journal of Agricultural Science. 149:1-14
SUMMARYPlant productivity and other ecosystem processes vary widely in their responses to experimental increases in atmospheric carbon dioxide (CO2) concentration. A conceptual framework first suggested by Chapinet al.(1996) was adapted to address th
Publikováno v:
Plant, Cell & Environment. 25:557-566
An investigation to determine whether stomatal acclimation to [CO 2 ] occurred in C 3 /C 4 grassland plants grown across a range of [CO 2 ] (200‐550 µ mol mol − − − 1 ) in the field was carried out. Acclimation was assessed by measuring the
Publikováno v:
Global Change Biology. 7:747-754
Increasing atmospheric CO2 concentrations may have a profound effect on the structure and function of plant communities. A previously grazed, central Texas grassland was exposed to a 200-µmol mol−1 to 550 µmol mol−1 CO2 gradient from March to m
Publikováno v:
Plant and Soil. 231:97-104
Aboveground growth of C4plants responds more strongly to atmospheric CO2 concentration when soil water is limiting rather than abundant. Whether the same is true of root growth and morphology, however, remains to be evaluated. We investigated interac
Publikováno v:
International Journal of Plant Sciences. 161:779-783
Evidence from numerous sources indicates that atmospheric CO2 concentration has increased over the last 200 yr and will continue to increase in the foreseeable future. Much research is directed toward predicting the effects of this change on terrestr
Publikováno v:
Functional Ecology. 14:388-396
Summary 1. We describe a field facility that controls CO 2 along continuous gradients from superambient to subambient concentrations. The facility consists of two transparent, tunnel-shaped chambers, each 1-m wide and tall and 60-m long. Pure CO 2 is
Publikováno v:
Tree Physiology. 21:771-773
Transpiration per unit leaf area of Acacia farnesiana (L.) Willd. plants grown at a CO2 concentration ([CO2]) of 385 micromol x mol(-1) was about twice that of plants grown at 980 micromol x mol(-1). However, whes plants grown for more than a year at
Publikováno v:
Functional Ecology. 21
Summary 1. Plants usually respond to carbon dioxide (CO 2 ) enrichment by increasing photosynthesis and reducing transpiration, but these initial responses to CO 2 may not be sustained. 2. During May, July and October 2000, we measured the effects of