Yield and nitrogen accumulation and partitioning in winter wheat under elevated CO2: A 3-year free-air CO2 enrichment experiment
Xue Han, Xingyu Hao, Shu Kee Lam, Heran Wang, Yingchun Li, Tim Wheeler, Hui Ju, Erda Lin
AGRICULTURE ECOSYSTEMS & ENVIRONMENT | ELSEVIER SCIENCE BV | Published : 2015
Fossil fuel combustion and deforestation have resulted in a rapid increase in atmospheric [CO2] since the 1950’s, and it will reach about 550μmolmol−1 in 2050. Field experiments were conducted at the Free-air CO2 Enrichment facility in Beijing, China. Winter wheat was grown to maturity under elevated [CO2] (550±17μmolmol−1) and ambient [CO2] (415±16μmolmol−1), with high nitrogen (N) supply (HN, 170kg Nha−1) and low nitrogen supply (LN, 100kg Nha−1) for three growing seasons from 2007 to 2010. Elevated [CO2] increased wheat grain yield by 11.4% across the three years. [CO2]-induced yield enhancements were 10.8% and 11.9% under low N and high N supply, respectively. Nitrogen accumulation under..View full abstract
Awarded by National Basic Research Program of China (973 Program)
Awarded by National Key Technology R&D Program in the 12th Five year Plan of China
Awarded by Natural Science Fund projects of Shanxi Province
This work was supported by The National Basic Research Program of China (973 Program) (No. 2012CB955904), National Key Technology R&D Program in the 12th Five year Plan of China (No. 2013BAD11B03), the UK-China Sustainable Agriculture Innovation Network (SAIN) projects, The Agricultural Science and Technology Innovation Program of CAAS, and Natural Science Fund projects of Shanxi Province (No. 2013011039-3).