Claim · model-written summary
SD3 reduced yield by 9% relative to SD1.
Triticum aestivumNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delaying SD to SD3 and SD4 reduced yield by 9% and 11.3% (SD3: 8 Mg ha−1 and SD4: 7.74 Mg ha−1).”
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 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 spike biomass to biomass at anthesis.
- 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.