We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Greenhouse Gas Emissions from Paddy Soils Respond to Different Crop Root Residues and N Fertilizer Types.
- Authors
Xiao, Yan
- Abstract
Greenhouse gas emissions from paddy soils respond differently to different combinations of crop root residues and N forms. An incubation experiment was carried out to explore the effect of four crop residues (milk vetch, ryegrass, winter wheat, and rape) and four nitrogen treatments (without fertilizer, urea, (NH)SO, and KNO) on CH, CO, and NO emissions in a paddy soil. Except in KNO application treatments, CH emissions of milk vetch residue treatments were significantly higher than those of the rest residue treatments. In the presence of milk vetch and ryegrass residues, urea application significantly increased CH emissions in comparison to treatments without fertilizer. Urea significantly promoted CO emissions, whereas (NH)SO and KNO significantly inhibited CO emissions at all root residue treatments. Urea did not increase NO emissions, but (NH)SO and KNO promoted NO emissions at all residue treatments. In addition, KNO had more effects on the increase of NO emissions than (NH)SO in milk vetch-amended soils. Urea addition had no effect on global warming potentials, and (NH)SO and KNO addition significantly increased global warming potentials at all residue treatments except KNO + winter wheat residue combination. Our results indicated that urea application had no additive effect on global warming when root residues were left in paddy soils, whereas (NH)SO and KNO application could increase the risk of global warming.
- Subjects
GREENHOUSE gases &; the environment; ENVIRONMENTAL soil science; CROP residues; NITROGEN fertilizers &; the environment; CARBON cycle; AGRICULTURE &; the environment
- Publication
Water, Air & Soil Pollution, 2017, Vol 228, Issue 12, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-017-3594-z