An Asian Journal of Soil Science

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Impact of Elevation of Atmospheric CO2 on Yield and Biomass Partitioning in Rice and Wheat


Affiliations
1 Regional Agricultural, Research Station, Pattambi (Kerala), India
2 Indian Agricultural Research Institute, New Delhi, India
     

   Subscribe/Renew Journal


To study the impacts of elevation of CO2 on rice-wheat system, a pot culture experiment and a field experiment were undertaken. The pot culture experiment was conducted in open top chambers (OTCs) with surface soils collected from a typic haplustept (IARI, New Delhi). Rice and wheat were grown as test crops at ambient (approx. 370 mol mol-1) and elevated (600±50  mol mol-1) levels of atmospheric CO2. Total biomass yield was increased by 32.26 and 33.83 per cent as a result of elevation of CO2 concentration in the micro climate of rice and wheat, respectively. Various plant parts differed with respect to their relative gain in yield and the relative gains in biomass of different plant parts on exposure to elevated CO2 were in the order of: Rice: Grain (48.11) > Leaves (43.97) > ischolar_mains (34.95) > stem (18.80) and Wheat: Root (70.54) > Leaves (42.50) > grain (35.39) > stem (21.00). At all stages of crop growth, exposure to higher CO2 in atmosphere increased the preferential partitioning of carbon to ischolar_mains both in rice and wheat.

Keywords

OTC, FACE, Elevated CO2, Rice-Wheat.
Subscription Login to verify subscription
User
Notifications
Font Size


  • Coleman, J.S., McConnaughay, K.D.M. and Bazzaz, F.A. (1993). Elevated CO2 and plant nitrogen use: Is reduced tissue nitrogen concentration size dependent? Oecologia, 93: 195200.

  • Kant Pratap, C.B., Bhadraray, S., Purakayastha, T.J., Jain, V., Pal, M. and Datta, S.C. (2007). Active carbon pools in rhizosphere of wheat (Triticum aestivum L.) grown under elevated atmospheric carbon dioxide concentration in a Typic Haplustept in sub-tropical India. Environ. Pollut., 147, 273– 281.

  • Kimball, B.A. (1986). Influence of elevated CO2 on crop yield. In: Carbon dioxide enrichment of greenhouse crops.2: Physiology, yield, and Economics. (Enoch, H.Z. and Kimbail, B.A. Eds.), CRC Press, Boca Raton, FL, pp. 105-115.

  • Norby, R.J., Wullschleger, S.D., Gunderson, C.A., Hohnson, D.W. and Ceulemans, R. (1999). Tree response to rising CO2 in field experiments: implication for the future forest. Plant Cell & Environ., 22: 683-714.

  • Rogers, G.S., Milham, P.J., Thibaud, M.C. and Conroy, J.P. (1996). Interaction between rising CO2 concentration and nitrogen supply in cotton. I. Growth and leaf nitrogen concentration. Australian J. Plant Physiology, 23: 119-125.

  • Rogers, H.H., Runion, G.B. and Krupa, S.V. (1994). Plant responses to atmospheric CO2 enrichment with emphasis on ischolar_mains and rhizosphere. Environmental Pollution, 83: 155-189.

  • Taub, D., Miller, B. and Allen, H. (2008). Effects of elevated CO2 on protein concentration of food crops: meta analysis. Glob. Change Biol., 14 : 565–575.

  • Ziska, L.H., Weerakoon, W., Namuco, O.S. and Pamplona, R. (1996). The influence of nitrogen on the elevated CO2 response in field grown rice. Australian J. Plant Physiology, 23: 45-52.


Abstract Views: 513

PDF Views: 0




  • Impact of Elevation of Atmospheric CO2 on Yield and Biomass Partitioning in Rice and Wheat

Abstract Views: 513  |  PDF Views: 0

Authors

V. Thulasi
Regional Agricultural, Research Station, Pattambi (Kerala), India
T. J. Purakayastha
Indian Agricultural Research Institute, New Delhi, India
Deo Pal
Indian Agricultural Research Institute, New Delhi, India

Abstract


To study the impacts of elevation of CO2 on rice-wheat system, a pot culture experiment and a field experiment were undertaken. The pot culture experiment was conducted in open top chambers (OTCs) with surface soils collected from a typic haplustept (IARI, New Delhi). Rice and wheat were grown as test crops at ambient (approx. 370 mol mol-1) and elevated (600±50  mol mol-1) levels of atmospheric CO2. Total biomass yield was increased by 32.26 and 33.83 per cent as a result of elevation of CO2 concentration in the micro climate of rice and wheat, respectively. Various plant parts differed with respect to their relative gain in yield and the relative gains in biomass of different plant parts on exposure to elevated CO2 were in the order of: Rice: Grain (48.11) > Leaves (43.97) > ischolar_mains (34.95) > stem (18.80) and Wheat: Root (70.54) > Leaves (42.50) > grain (35.39) > stem (21.00). At all stages of crop growth, exposure to higher CO2 in atmosphere increased the preferential partitioning of carbon to ischolar_mains both in rice and wheat.

Keywords


OTC, FACE, Elevated CO2, Rice-Wheat.

References