Claim · model-written summary
Excessive nitrogen application (450 kg hm-2) decreased seed setting rate and grain number per spike in rice.
- Taxon
- rice
Oryza sativae0 - Treatment
- excessive nitrogen application (450 kg hm-2)e1
- Outcome
- seed setting rate and grain number per spikee2
- Direction
- decreasee2
Not reportedComparator
Verbatim
e0“yield of rice varieties with different nitrogen efficiency”
e1“excessive nitrogen application (450 kg hm-2)”
e2“a decrease in seed setting rate and grain number per spike”
Title
Zhi-Wen SONG; Lei ZHAO; Jun-Guo BI; et al. ACTA AGRONOMICA SINICA 2024. doi:10.3724/sp.j.1006.2024.32061
Other claims from this paper (15)
- Intervention effect Applying nitrogen fertilizer increased dry matter accumulation of drip-irrigated rice by 1.99%-26.02%.
- Intervention effect Applying nitrogen fertilizer increased nitrogen accumulation of drip-irrigated rice by 25.67%-97.69%.
- Intervention effect Applying nitrogen fertilizer increased rice yield by 23.75%-66.75% under drip irrigation.
- Intervention effect Excessive nitrogen application (450 kg hm-2) reduced the promoting effect on dry matter accumulation in drip-irrigated rice.
- Observation Excessive nitrogen application (450 kg hm-2) concentrated nitrogen mainly in the straw of rice.
- Intervention effect Excessive nitrogen application (450 kg hm-2) ultimately reduced the nitrogen utilization efficiency of rice.
- Observation Under the same nitrogen conditions, the effective number of panicles of T-43 was higher than LX-3 by 1.65%-5.19%.
- Observation Under the same nitrogen conditions, seed setting rate of T-43 was higher than LX-3 by 0.42%-8.47%.
- Observation Under the same nitrogen conditions, dry matter and nitrogen accumulation in leaves and panicles of T-43 were higher than LX-3 by 7.61%-19.68%, 19.81%-40.73%, 19.81%-30.23% and 20.14%-49.65%, respectively.
- Observation Final yield of T-43 was higher than LX-3 by 4.23%-28.47% under the same nitrogen conditions.
- Observation The response of nitrogen utilization efficiency varied among rice varieties (P < 0.05).
- Observation T-43 had higher N agronomic efficiency than LX-3 by 1.05%-25.23%.
- Observation T-43 had higher N recovery efficiency than LX-3 by 5.86%-20.05%.
- Observation T-43 had higher N partial factor productivity than LX-3 by 10.09%-18.01%.
- Recommendation Under drip irrigation, selecting the high nitrogen efficient cultivar T-43 and applying 300 kg hm-2 nitrogen was the best combination of variety and nitrogen rate in this experiment, giving better nitrogen uptake and transport and higher yield.