.png){kind=icon}
.png){kind=icon}
Return
Efficient fertilization pattern for rice production within the rice-wheat systems
.png){kind=icon}
PRE
AI
S
H
W
Y
J
W
J
Y
Z
Y
DOI：10.1016/j.fcr.2025.109925.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Context: Rice is a staple food for nearly half of the global population. Traditional nitrogen (N) fertilization practices, characterized by high inputs and frequent applications, face increasing challenges related to low N use efficiency (NUE) and rising labor costs. Research question: Previous studies have highlighted the benefits of controlled-release blended fertilizers (CRBF) for enhancing rice production. While limited research has been conducted on the effects of CRBF with different fertilization techniques and their applicability within rice-wheat systems. Methods: A three-year field experiment was conducted at two sites with contrasting soil fertility levels. Six treatments were evaluated: broadcast conventional fertilization of urea (BCF), broadcast conventional fertilization of urea with a 25 % reduction in N (BRF), broadcast fertilization of CRBF with a 25 % reduction in N (BBF), whole-layer fertilization of CRBF with a 25 % reduction in N (WBF), side-deep fertilization of CRBF with a 25 % reduction in N (SBF), and a control without N fertilization. Results: Compared to BCF, SBF increased rice yield by 3.2-8.8 % primarily due to a 5.1-6.7 % increase in panicle numbers, and all CRBF treatments enhanced NUE by 27.6-60.8 % with SBF exhibiting the highest. Notably, SBF improved rice yield and NUE by 6.0-7.0 % and 19.4-25.2 % compared to other CRBF treatments in low-fertility site, respectively, while no significant differences were observed among CRBF treatments in high-fertility site. This pattern reflects the differing responses of rice growth and soil N availability to fertilization patterns under varying soil fertility conditions. Our structural equation model results indicate that fertilization patterns primarily influence rice yield by affecting soil NH4+-N levels and subsequently altering root growth. Economic analysis revealed that SBF resulted in a 37.2-40.1 % increase in net income compared to BCF, primarily due to reduced labor costs and improved yields, with smaller differences among CRBF treatments in high-fertility site. Conclusions: CRBF emerges as a viable alternative to conventional N fertilization, effectively delivering high rice yields and enhanced economic returns across sites with varying soil fertility. SBF optimizes N supply and boosts rice production, yielding significant increases in both yield and NUE, particularly in low-fertility environments. Implications: The findings of this study offer a novel perspective on achieving high yields and efficient fertilization strategies in rice cultivation within rice-wheat systems, potentially guiding future agricultural practices toward improved sustainability and productivity.
Keywords:
Controlled-release blended fertilizer
Side-deep fertilization
Rice yield
Nitrogen use efficiency
Root activity
Journal
IF:
6.4
Papers:
6.4K
Citations:
2.8W
Organization
No organization information available
Cited Papers