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Titolo:
DO INCREASING ATMOSPHERIC CO2 CONCENTRATIONS CONTRIBUTE TO YIELD INCREASES OF GERMAN CROPS
Autore:
MANDERSCHEID R; WEIGEL HJ;
Indirizzi:
BUNDESFORSCH ANSTALT LANDWIRTSCHAFT,INST PROD & OKOTOXIKOL,BUNDESALLEE 50 D-38116 BRAUNSCHWEIG GERMANY
Titolo Testata:
Journal of agronomy and crop science
fascicolo: 2, volume: 175, anno: 1995,
pagine: 73 - 82
SICI:
0931-2250(1995)175:2<73:DIACCC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBON-DIOXIDE; ELEVATED CO2; PHASEOLUS-VULGARIS; GROWTH; ENRICHMENT; RESPONSES; PLANTS; WHEAT;
Keywords:
ATMOSPHERIC CO2-CONCENTRATION; BEAN; MAIZE; SPRING BARLEY; SPRING WHEAT; GROWTH; YIELD; HECTARE YIELD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
R. Manderscheid e H.J. Weigel, "DO INCREASING ATMOSPHERIC CO2 CONCENTRATIONS CONTRIBUTE TO YIELD INCREASES OF GERMAN CROPS", Journal of agronomy and crop science, 175(2), 1995, pp. 73-82

Abstract

The global atmospheric CO2-concentration is increasing and there has been an increase in Germany of about 30 ppm from 340 ppm to 370 ppm CO2 during the last two decades. The hectare yield of many crops has also increased during this time period. The objective of the present study was to estimate whether the past and future change in the atmospheric composition significantly contributes to the increase in hectare yield. Different crop species (beans, Phaseolus vulgaris, cv Pfalzer Juni; spring barley, Hordeum vulgare L., cvs. Alexis and Arena; spring wheat, Triticum aestivum L., cvs. Star and Turbo; maize, Zea mays L., cvs. Bonny and Boss) were grown at ambient (372 ppm) and at slightly elevated CO2-concentrations (459 ppm and 539 ppm) in open-top chambers andthe effect of the different CO2-concentrations on the growth and yield of the plants was measured. The past and future CO2-effect was estimated from the slope of a linear CO2-yield curve (percentage increase in yield per ppm CO2, 100 % at 370 ppm) fitted to the data and those from previous studies on wheat and maize. The percentage increase in yield per ppm CO2 is insignificant for beans, of borderline significance for silage maize (0.06 % per ppm), and 0.35 % per ppm and 0.26 % per ppm for barley and wheat, respectively. The CO2-elevation primarily decreases the tiller dieback of the cereals. Considering the increase in CO2 of 30 ppm and in the hectare yield of 25 % (barley) and 28 % (wheat) from 1970 to 1990, the contribution of CO2 to the increase in the agricultural production is estimated to be one fourth up to one half ofthe increase in hectare yield of spring cereals. Given a recent yearly increase of 2 ppm the future CO2-related increase in hectare yield is estimated to be about 0.5-0.7 % per year.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 06:31:05