Abstract
Abstract Purpose Nitrogen fertilizer management is an important agricultural tool that must be optimized to promote sustainable practices since the nitrogen-fertilizer recovery by plants (NRP) is low, leading to nitrogen losses to the environment. In sugarcane, N-fertilization has been investigated over the years but little attention has been given to N-fertilizer application methods. Sugarcane crop production and environmental impact regarding N-fertilizer application methods (i.e., applied onto the sugarcane straw layer and incorporated into the soil) were investigated in the present study aiming to achieve an environmental-friendly cropping system. Methods Sugarcane yield and NRP, N 2 O emissions, relevant components of the soil microbiological community and N-fertilizer retention in soil layers were quantified. The experiment was carried out in field conditions where N-fertilizer application methods using 15 N-labelled ammonium nitrate ( 15 NH 4 15 NO 3 ) were compared to a control treatment with no N-fertilization. Results Incorporation of N-fertilizer into the soil increased the sugarcane yield by 17% (two-year average) compared to N-fertilizer applied onto the sugarcane straw layer, which was similar to control treatment. There was an increase in NRP-fertilizer of 79% due to the application of N-fertilizer incorporated into the soil. Furthermore, soil incorporation of N-fertilizer decreased N 2 O emission by 22% with the fertilizer N emission factor reduced four-fold. The N 2 O emissions were mostly associated with ammonium-oxidizing bacteria (AOB). Conclusions Our results show that application of N-fertilizer incorporated into the soil is an environmental-friendly N-fertilization management which will improve agricultural sustainability and reduce environmental impacts. Graphical Abstract
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Soil incorporation increased sugarcane yield by 17% compared with application onto straw.
Verbatim
e0“Incorporation of N-fertilizer into the soil increased the sugarcane yield by 17% (two-year average) compared to N-fertilizer applied onto the sugarcane straw layer”
Claim · model-written summary
Fertilizer nitrogen recovery increased by 79% with soil incorporation.
Verbatim
e0“There was an increase in NRP-fertilizer of 79% due to the application of N-fertilizer incorporated into the soil”
t0“Sugarcane”
e2“N-fertilizer applied onto the sugarcane straw layer”
Claim · model-written summary
Soil incorporation decreased N2O emissions by 22%.
Verbatim
e0“soil incorporation of N-fertilizer decreased N 2 O emission by 22%”
t0“Sugarcane”
e2“N-fertilizer applied onto the sugarcane straw layer”
Claim · model-written summary
The fertilizer N emission factor fell four-fold with soil incorporation.
Verbatim
e0“with the fertilizer N emission factor reduced four-fold”
t0“Sugarcane”
e2“soil incorporation of N-fertilizer decreased N 2 O emission”
e3“N-fertilizer applied onto the sugarcane straw layer”
Claim · model-written summary
N2O emissions were mostly associated with ammonium oxidizing bacteria.
Not reportedDirection
Verbatim
e0“The N 2 O emissions were mostly associated with ammonium-oxidizing bacteria (AOB)”
t0“Sugarcane”
Claim · model-written summary
The authors conclude that incorporating N fertilizer into soil can improve sustainability and reduce environmental impact.
Verbatim
e0“application of N-fertilizer incorporated into the soil is an environmental-friendly N-fertilization management which will improve agricultural sustainability and reduce environmental impacts”
t0“Sugarcane”
The same questions in other papers
nitrogen · yield · Saccharum officinarum (sugarcane)Results differ
117 papers in the same direction as this paper · 15 in the opposite direction · 4 reporting no difference from an alternative
- negative
- positive
- positive
133 papers more in this group
See all 137 papers →nitrogen · environment: emissions · Saccharum officinarum (sugarcane)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.