Claim · model-written summary
Clover growth rate was slightly reduced (<10%) at very low N availability.
TrifoliumNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Clover growth rates were also independent of mineral N availability except for a slight (<10%) reduction at very low N availability levels”
Title
G.S. Griffith Journal of Experimental Botany 2000. doi:10.1093/jexbot/51.352.1879
Other claims from this paper (13)
- Association Mass specific mineral N uptake rates of clover cultivars and ryegrass were similar saturating functions of mineral N availability.
- Association Total N assimilation rates, whole plant C : N ratios and root : shoot ratios of clover cultivars were independent of mineral N availability.
- Association Clover growth rates were independent of mineral N availability, except for a slight reduction at very low N availability.
- Mechanism Specific N2 fixation rate of whole clover plants is precisely controlled to balance the N deficit that remains for constant C : N ratio.
- Observation A deficit always existed between N uptake and the total N assimilation required to maintain C : N ratio in clover.
- Observation Some N2 fixation remained engaged in clover even at high mineral N availability.
- Mechanism Inter-cultivar variation in N2 fixation dynamics of clover could be attributed to variation in growth rate.
- Observation Clover mass specific growth rate declined as plant size increased.
- Intervention effect Increased N availability increased ryegrass growth rate.
- Intervention effect Increased N availability decreased C : N and root : shoot ratios in ryegrass.
- Observation Ryegrass growth rate declined as plant size increased.
- Mechanism Clover inter-cultivar variation in field performance is unlikely to result from variation in N-handling characteristics.
- Mechanism Inter-cultivar differences in growth rate are likely the more important source of clover variation.