关键词: 硅肥, 硅肥, 水稻, 茎秆抗折力, 影响

Abstract: Abstract: The carbon footprint of crop production is an important component of total carbon footprint, and the study of sources and intensity of carbon emissions is essential to the reduction of greenhouse gas emissions. Based on the main input factors and their coefficients for carbon emissions, the carbon emissions and carbon intensity of crop production were calculated over 1995-2012 in Qingdao City. The results indicated that: (1) in total, carbon emissions of crop production tended to reduce; however, there were 2 different periods, i. e, the relative stable period of 1995-2007 and the yearly reducing period of 2008-2012; (2) based on the proportions of the main input factors’ contributions for carbon emissions , the largest proportion was N fertilize that was up to 43.31%, while based on relative increasing rate of carbon emissions from 1995 to 2012, the fastest was plastic film that was up to 85.51%; (3) changes in carbon intensity indicated that increase of output and yield could be obtained through the way of reasonable combination and efficient utilization of main input factors without increasing carbon emissions.