Claim · model-written summary
Excess N application significantly decreased net assimilation rate, reducing crop growth rate and net dry matter accumulation.
- Taxon
- rice
Oryza sativat0 - Treatment
- N application is over limitatione0
- Outcome
- net assimilation rate (NAR)e0
- Direction
- decreasese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“double-cropping rice”
e0“the net assimilation rate (NAR) significantly decreases when the N application is over limitation, in turn leading to reduced crop growth rate (CGR) and net dry matter accumulation”
Title
Zheng Jing; Yi Li; Zhuo Chuan 2004
Other claims from this paper (12)
- Intervention effect N uptake of double-cropping rice followed a parabola curve with N application rate in the first crop of ratoon rice.
- Observation The N absorption rate of rice was highest at the panicle development phase in the first crop.
- Observation The N absorption rate was second highest at late tillering and grain filling of the first crop and from first-crop harvest to full heading of the second crop.
- Intervention effect The share of soil N in total rice N uptake decreased as N application rate increased.
- Intervention effect Fertilizer N uptake followed a parabola curve with increasing N application rate.
- Intervention effect Dry matter accumulation of double-cropping rice followed a parabola curve with first-crop N application rate.
- Association Grain yield correlated significantly and positively with total dry matter accumulation.
- Association First-crop grain yield correlated very closely with net dry matter accumulation in the middle to late stages of the first crop.
- Association Second-crop grain yield also correlated very closely with net dry matter accumulation in the middle to late stages of the first crop.
- Intervention effect Net dry matter accumulation and grain yield of both crops were highest with 225-300 kg/hm2 N in the first crop plus suitable bud fertilizer.
- Observation First-crop grain yield was 10913-11300 kg/hm2.
- Observation Second-crop grain yield of ratoon rice was 7565-7878 kg/hm2.