TY - JOUR
T1 - Frequent alternate wetting and drying irrigation mitigates the effect of low phosphorus on rice grain yield in a 4-year field trial by increasing soil phosphorus release and rice root growth
AU - Xu, Feiyun
AU - Song, Tao
AU - Wang, Ke
AU - Xu, Weifeng
AU - Chen, Guanglei
AU - Xu, Min
AU - Zhang, Qian
AU - Liu, Jianping
AU - Zhu, Yiyong
AU - Rensing, Christopher
AU - Zhang, Jianhua
AU - Yuan, Wei
N1 - Funding Information:
We are grateful for grant support from the National Key R&D Program of China (2017YFE0118100, 2018YFD02003025, and 2017YFD0200206), National Natural Science Foundation of China (31872169), Newton Advanced Fellowship (NSFC-RS: NA160430), strategic leading special science and technology project of the Chinese Academy of Sciences (XDB15030201).
PY - 2020/8/1
Y1 - 2020/8/1
N2 - The nonrenewable nutrient phosphorus (P) has low mobility in soil and is often present in forms that are unavailable to crop plants. Alternate wetting and drying irrigation is one of the widely promoted water-saving irrigation techniques and can increase mineral nutrient availability; however, its interaction with P in paddy fields remains unclear. We conducted a 4-year field experiment to determine whether a specific regime of frequent alternate wetting and drying (FAWD15) irrigation and low P usage (P45) had synergistic effects on rice yield, rice growth, water use efficiency (WUE), agronomic P use efficiency (AEp), and soil residual fertilizer P. We found that compared to the continuously flooded (CF) irrigation, FAWD15 irrigation maintained rice yield under low P usage condition in a 4-year field trial. Our results also showed that under low P usage, FAWD15 resulted in high AEp and WUE, and reduced residual fertilizer P. Further, FAWD15 irrigation increased labile P release and resulted in increased root growth by improving root sucrose distribution. These results suggest that FAWD15 irrigation can mitigate the effect of low P usage on rice grain yield by increasing soil P release and root growth in paddy fields.
AB - The nonrenewable nutrient phosphorus (P) has low mobility in soil and is often present in forms that are unavailable to crop plants. Alternate wetting and drying irrigation is one of the widely promoted water-saving irrigation techniques and can increase mineral nutrient availability; however, its interaction with P in paddy fields remains unclear. We conducted a 4-year field experiment to determine whether a specific regime of frequent alternate wetting and drying (FAWD15) irrigation and low P usage (P45) had synergistic effects on rice yield, rice growth, water use efficiency (WUE), agronomic P use efficiency (AEp), and soil residual fertilizer P. We found that compared to the continuously flooded (CF) irrigation, FAWD15 irrigation maintained rice yield under low P usage condition in a 4-year field trial. Our results also showed that under low P usage, FAWD15 resulted in high AEp and WUE, and reduced residual fertilizer P. Further, FAWD15 irrigation increased labile P release and resulted in increased root growth by improving root sucrose distribution. These results suggest that FAWD15 irrigation can mitigate the effect of low P usage on rice grain yield by increasing soil P release and root growth in paddy fields.
KW - frequent alternate wetting and drying irrigation
KW - phosphorus use efficiency
KW - rice
KW - root growth
KW - water use efficiency
UR - http://www.scopus.com/inward/record.url?scp=85083680067&partnerID=8YFLogxK
U2 - 10.1002/fes3.206
DO - 10.1002/fes3.206
M3 - Journal article
AN - SCOPUS:85083680067
SN - 2048-3694
VL - 9
JO - Food and Energy Security
JF - Food and Energy Security
IS - 3
M1 - e206
ER -
