Abstract
The Huang-Huai-Hai-plains (HHH) is the main wheat (Triticum aestivum)-maize(Zea mays) production area of China. Therefore, adoption of appropriate fertilizer management strategies of improving soil organic carbon (SOC) and crop yields is an important option in HHH. These studies included a total of 6 land use and management treatments including: (i) no fertilizer(CK); (ii) chemical nitrogen(N), phosphorus(P) and potassium(K) fertilizers separately(UF); (?) combined application of chemical fertilizer N,P and K(CF); (?) wheat and maize straw retention or manures including that from soybean (Glycine max) cake, chicken, horse and cow dung or manures only (O); (?) combined application N, P and K and organic fertilizers (CFO); (?) combined application of chemical fertilizer N,P or K separately and organic fertilizers (UFO). The data indicated the following: (i) The baseline SOC stock of arable land was 18.9±1.8 Mg ha-1 and the corresponding crop yield was 4.4±1.5 Mg ha-1; the highest SOC stock was 24.6±1.8 Mg ha-1 for CFO and the corresponding crop yield was 9.7±3.2 Mg ha-1; (ii) The rate of increase of SOC stock was in the order of CFO>UFO>CF>O>UF, while that of increase in crop yield was in the order of CFO>CF>UFO>UF>O; (?) Crop yield increased (Mg ha-1 yr-1) by 0.114 in UF and CF, by 0.039 in treatment O,CFO and UFO, and by 0.033 in CK by increase in SOC stock by 1 Mg ha-1; (?) Yield increased (Mg ha-1 yr-1) by 0.298, 0.119,0.065, and 0.022 by over 5, 10, 15, and over 25 years by increase in SOC stock by 1 Mg ha-1. Therefore, the combined application of chemical and organic fertilizers is the best choice for the developing countries to adapt to and mitigate climate change while advancing food security.
Highlights
The challenges of mitigating climate change and ensuring global food security are among the main global issues of the 21 century
The results show that the fertilizer management combined chemical and organic fertilizer is the best way to increase crop production and improve soil organic carbon (SOC) sequestration across the HHH
The results presented confirmed that the increase in SOC stock in the HHH is due to the balanced application of chemical fertilizers N, P and K and straw residue returned since 1980s
Summary
The challenges of mitigating climate change and ensuring global food security are among the main global issues of the 21 century. Anthropogenic activities have led to an increase in atmospheric concentration of Carbon Dioxide (CO2) from 280 ppm in the per-industrial era to almost 400 ppm at present (The Carbon Dioxide Information Analysis Center [CDIAC], 2009; The World Meteorological Organization [WMO], 2008), and CO2 concentration is increasing at the rate of about 2.2 ppm yr-1. There are more than 1 billion food-insecure people on the world, mostly in developing regions of Asia/Pacific, Sub-Saharan Africa, South/Central American, and the Caribbean (The Food and Agriculture Organization [FAO], 2009). The strategy is to increase agricultural production without increasing either the land area or the chemical fertilizer used. Sustainable management of fertilizers is the optimal choice for the developing countries to adapt to and mitigate climate change while advancing food security
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
