Claim · model-written summary
Root zone soil ammonium and nitrate nitrogen concentrations and root length density were strongly correlated with summer flush architectural traits.
CitrusNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“citrus”
e1“Root zone soil ammonium nitrogen and nitrate nitrogen concentrations and root length density were strongly correlated with SF architectural traits”
Title
Effects of summer nitrogen application rate on citrus shoot-root-soil interactions
Wenfeng Li; Qianzi Wang; Yongzhong Liu; et al. Scientia Horticulturae 2026. doi:10.1016/j.scienta.2026.114698
Other claims from this paper (17)
- Intervention effect Reducing nitrogen supply progressively delayed summer flush emergence in citrus.
- Intervention effect Reducing nitrogen supply advanced maturation of the summer flush, shortening the flush period.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing shoot number by 42.86 %.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing length by 8.99 %.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing basal diameter by 9.76 %.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing leaf number by 16.74 %.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing emergence rate by 29.37 %.
- Intervention effect Moderate N (3–4 g per plant) significantly suppressed summer flush growth relative to high N (5–7 g per plant), reducing biomass by 47.59 %.
- Intervention effect The optimal N range maximized the net increment in plant height (1.96 cm).
- Intervention effect The optimal N range maximized the net increment in main stem diameter (1.52 cm).
- Observation Within the optimal N range, summer shoots maintained medium-to-high levels of nutrient content (N, phosphorus, potassium).
- Observation Within the optimal N range, summer shoots maintained medium-to-high levels of physiologically active substances (abscisic acid, chlorophyll, proline).
- Observation Within the optimal N range, root growth was moderated to a medium-low level.
- Observation The nutrient status of the root zone soil and roots remained in the medium-to-high range.
- Method / resource Multiple regression models incorporating soil nitrogen and root variables explained more than 50% of the variance in summer flush phenotype.
- Mechanism The regulation of summer flush growth is attributed to an N-driven soil-root-shoot feedback in which the root zone inorganic N pool, root morphology and the balance of shoot active substances jointly define growth patterns.
- Recommendation Applying 3–4 g N per plant is advisable as the ideal summer rate for potted citrus seedlings in controlled environments.