Abstract
Two sweet sorghum cultivars,mid-early maturity cultivarXingaoliang 3and mid-late maturity cultivarXingaoliang 9,were planted in saline-alkaline soil.Photosynthetic characteristics and agronomic traits of them were studied.The result showed that:(1)Compared to control,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci),water use efficiency(WUE),and SPAD value(SPAD)were significantly lower in saline-alkaline soil,especially at late growth period.Pn,Gs,WUE,and SPADof Xingaoliang 3 were higher whereas Trand Ci were lower than those of Xingaoliang 9 in saline-alkaline soil.(2)The growth duration ofXingaoliang 3was shortened by 9 days,whileXingaoliang 9only survived until jointing stage in salinealkaline soil.Compared to control,the biomass of two sweet sorghums in saline-alkaline soil was reduced by 57.8% and 76.5%,respectively,and sugar brix by 38.5% and 100%.(3)The correlation analysis indicated that Pn was highly correlated with Gs,PAR,and Ta.At early stage,the reduction in Pn was associated with stomatal limitation,whereas non-stomatal factor was the main cause after heading.
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Claims 11
Claim · model-written summary
Net photosynthetic rate, transpiration rate and stomatal conductance of sweet sorghum were significantly lower in saline-alkaline soil than in control, especially late in growth.
Verbatim
t0“sweet sorghum”
e1“Compared to control,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci),water use efficiency(WUE),and SPAD value(SPAD)were significantly lower in saline-alkaline soil,especially at late growth period”
Claim · model-written summary
Intercellular CO2 concentration, water use efficiency and SPAD value of sweet sorghum were significantly lower in saline-alkaline soil than in control.
Verbatim
t0“sweet sorghum”
e1“Compared to control,net photosynthetic rate(Pn),transpiration rate(Tr),stomatal conductance(Gs),intercellular CO2 concentration(Ci),water use efficiency(WUE),and SPAD value(SPAD)were significantly lower in saline-alkaline soil,especially at late growth period”
Claim · model-written summary
In saline-alkaline soil, Pn, Gs, WUE and SPAD were higher in Xingaoliang 3 than in Xingaoliang 9.
Verbatim
t0“sweet sorghum”
e2“Pn,Gs,WUE,and SPADof Xingaoliang 3 were higher whereas Trand Ci were lower than those of Xingaoliang 9 in saline-alkaline soil”
Claim · model-written summary
In saline-alkaline soil, Tr and Ci were lower in Xingaoliang 3 than in Xingaoliang 9.
Verbatim
t0“sweet sorghum”
e2“Pn,Gs,WUE,and SPADof Xingaoliang 3 were higher whereas Trand Ci were lower than those of Xingaoliang 9 in saline-alkaline soil”
Claim · model-written summary
The growth duration of Xingaoliang 3 was shortened by 9 days in saline-alkaline soil.
Verbatim
t0“sweet sorghum”
e3“The growth duration ofXingaoliang3was shortened by 9 days”
Claim · model-written summary
Xingaoliang 9 survived only until the jointing stage in saline-alkaline soil.
Verbatim
t0“sweet sorghum”
e4“whileXingaoliang 9only survived until jointing stage”
Claim · model-written summary
Biomass of the two sweet sorghum cultivars in saline-alkaline soil was reduced by 57.8% and 76.5% relative to control.
Verbatim
t0“sweet sorghum”
e5“Compared to control,the biomass of two sweet sorghums in saline-alkaline soil was reduced by 57.8% and 76.5%,respectively,and sugar brix by 38.5% and 100%”
Claim · model-written summary
Sugar brix of the two sweet sorghum cultivars in saline-alkaline soil was reduced by 38.5% and 100% relative to control.
Verbatim
t0“sweet sorghum”
e5“Compared to control,the biomass of two sweet sorghums in saline-alkaline soil was reduced by 57.8% and 76.5%,respectively,and sugar brix by 38.5% and 100%”
Claim · model-written summary
Pn was highly correlated with Gs, PAR and Ta in sweet sorghum.
Verbatim
t0“sweet sorghum”
e7“The correlation analysis indicated that Pn was highly correlated with Gs,PAR,and Ta”
Claim · model-written summary
At early stage, the reduction in Pn of sweet sorghum was associated with stomatal limitation.
Verbatim
t0“sweet sorghum”
e0“At early stage,the reduction in Pn was associated with stomatal limitation”
Claim · model-written summary
After heading, non-stomatal factor was the main cause of the reduction in Pn of sweet sorghum.
Verbatim
t0“sweet sorghum”
e0“the reduction in Pn was associated with stomatal limitation,whereas non-stomatal factor was the main cause after heading”
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