What the study found
Drip fertigation, a system that supplies water and nitrogen together, improved winter wheat yield and nitrogen uptake across a wide range of planting densities. The authors report that it also broadened the range of densities that still produced near-maximum yields.
Why the authors say this matters
The study suggests that drip fertigation may help winter wheat maintain high yield even when planting density differs from the optimum. The authors conclude that this is linked to improved nitrogen uptake and better coordination between the plant's source capacity and sink size, meaning the balance between resources made by the plant and grain demand.
What the researchers tested
The researchers compared conventional management with drip fertigation across two growing seasons in winter wheat. They tested a wide planting-density gradient from 100 to 800 seeds per square meter and measured grain yield, yield components, population traits, dry matter production, source-sink indices, canopy nitrogen status, nitrogen uptake, and nitrogen-use efficiency.
What worked and what didn't
Across seasons, drip fertigation increased grain yield by 15.4% to 20.8% compared with conventional management. Yield showed a quadratic response to planting density under both systems, but drip fertigation shifted the estimated optimal density upward to 456-487 seeds per square meter from 377-378 seeds per square meter under conventional management and kept near-maximum yields over a broader density range. It also increased productive stem percentage, grains per ear, post-anthesis dry matter production, post-anthesis nitrogen uptake, total nitrogen uptake at maturity, grain nitrogen accumulation, fertilizer-N recovery efficiency, and agronomic efficiency.
What to keep in mind
The abstract does not describe limitations beyond the study being conducted under two growing seasons and within the planting-density range tested. The findings are specific to the winter wheat systems and management regimes examined here.
Key points
- Drip fertigation increased winter wheat grain yield by 15.4% to 20.8% versus conventional management.
- The estimated optimal planting density was higher under drip fertigation than under conventional management.
- Drip fertigation increased post-anthesis dry matter production and post-anthesis nitrogen uptake.
- Fertilizer-N recovery efficiency and agronomic efficiency were both higher under drip fertigation.
- The authors link the yield response to improved source-sink coordination and nitrogen acquisition.
Disclosure
- Research title:
- Drip fertigation improved winter wheat yield and nitrogen uptake
- Authors:
- Xiaoyan Zhou, Mei Qian, Faming Wang, Fengjian Liang, Dapeng Gao, Shangzong Feng, Yonghui Wang, Fucheng Zhang, Xiaojun Hu
- Institutions:
- China Rural Technology Development Center, Cixian People's Hospital, Linyi University, Linyi University, Linyi University, Linyi University, Linyi University, Linyi University, Linyi University
- Publication date:
- 2026-04-02
- OpenAlex record:
- View
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