Claim · model-written summary
Later sowing increased the ratio of spike biomass to biomass at anthesis.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- delaying SDe1
- Outcome
- spike biomass to biomass at anthesise0
- Direction
- increasede0
- Comparator
- SD was delayede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As SD was delayed, the ratios of spike number to maximum stem number, postanthesis ET to seasonal ET, spike biomass to biomass at anthesis, and postanthesis biomass to total biomass all increased, resulting in higher harvest index and WUE.”
t0“wheat”
e1“Relative to the normal SD (SD1), moderately delaying SD to SD2 with increased SR did not reduce yield (SD1: 8.79 Mg ha−1 and SD2: 8.72 Mg ha−1).”
Title
Late sowing with high seeding rate increases wheat water use efficiency under deficit irrigation
B. Wang; Y. Zhang; B. Hao; et al. Journal of Soil and Water Conservation 2017. doi:10.2489/jswc.72.6.629
Other claims from this paper (19)
- Intervention effect Moderately delayed sowing with higher seeding rate did not reduce wheat yield versus normal sowing.
- Intervention effect SD3 reduced yield by 9% relative to SD1.
- Intervention effect SD4 reduced yield by 11.3% relative to SD1.
- Intervention effect Delaying sowing raised WUE from 1.83 to 2.07 kg m−3.
- Mechanism The authors attribute the WUE increase under delayed sowing to a shorter vegetative stage and lower preanthesis evapotranspiration.
- Intervention effect Soil water availability during grain filling was higher with later sowing under deficit irrigation.
- Intervention effect Photosynthetic rate during grain filling was higher with later sowing under deficit irrigation.
- Intervention effect Later sowing increased the ratio of spike number to maximum stem number.
- Intervention effect Later sowing increased the ratio of postanthesis ET to seasonal ET.
- Intervention effect Later sowing increased the ratio of postanthesis biomass to total biomass.
- Intervention effect Later sowing resulted in a higher harvest index.
- Mechanism The authors attribute lower yield on SD4 to fewer grains per spike, lower preanthesis biomass, and lower thousand-grain weight.
- Observation JM22 had higher Pn than SM15 during grain filling.
- Observation JM22 had higher postanthesis biomass than SM15 during grain filling.
- Observation JM22 had higher TGW than SM15 during grain filling.
- Observation JM22 had lower biomass remobilization (BMR) than SM15 during grain filling.
- Observation On SD4, JM22 had higher yield and WUE than SM15.
- Recommendation Under deficit irrigation in the NCP, the authors recommend SD2 with increased seeding rate for high yield and WUE.
- Recommendation The authors recommend SD4 with higher seeding rate to maximize WUE and limit yield loss, especially for JM22.