›› 2011, Vol. 28 ›› Issue (4): 724-728.

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Effects of Different Carbon and Nitrogen Fertilizer Combination Treatments on Canopy CO2 Concentration, Photosynthesis and Yield Formation of Cotton Field under Drip Irrigation in Xinjiang

YIN Fei-hu1, GAO Zhi-jian2, XIE Zong-ming3, CHEN Guan-wen1, LI Xiao-lan2   

  1. 1. Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, Xinjiang, China;
    2. Institute of Field Water Conservancy, Soil and Fertilizer Research, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, Xinjiang, China;
    3. Center for Molecular Agrobiotechnology and Breeding, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, Xinjiang, China
  • Received:2010-09-23 Revised:2011-03-14 Online:2011-08-25 Published:2011-09-06

Abstract: Based on pipe network system of drip irrigation under plastic film, the possibility of increasing cotton field canopy CO2 concentration and its effect were investigated via fertilization of dissolvable carbon fertilizer (water insoluble matter <1%). By setting different carbon and nitrogen fertilizer combination treatments, canopy CO2 concentration, leaf photosynthetic rate and yield formation of cotton field in Xinjiang were analyzed. The results show that canopy CO2 concentration was increased with the amount of carbon fertilizer increasing in cotton florescence. Under the conditions of providing adequate irrigation water and inadequate N fertilization, the leaf photosynthetic rate was higher under C300+N113.55 treatment (C300 means that the amount of ammonium bicarbonate was 300 kg/hm2), and N113.55 means that the amount of nitrogen was 113.55 kg/hm2, and it was the lowest under C600+N0 treatment. The seed cotton yield under C300+N113.55 treatment was the highest, and it was the lowest under C600+N0 treatment. There was a significant difference in seed cotton yield among different carbon and nitrogen fertilizer combination treatments.

Key words: carbon and nitrogen fertilizer combination, cotton canopy, CO2 concentration, photosynthesis, cotton yield, drip irrigation, Xinjiang

CLC Number: 

  • S158.3