Due to its tolerance to water deficit and salinity,sorghum is considered a suitable crop for cultivation in regions affected by these stress conditions,enabling the efficient use of limited water resources.This study ...Due to its tolerance to water deficit and salinity,sorghum is considered a suitable crop for cultivation in regions affected by these stress conditions,enabling the efficient use of limited water resources.This study evaluated the resilience of the sweet sorghum cultivar BRS 506 under water deficit and salinity stress,focusing on water relations and yield performance in semiarid conditions.A randomized complete block design was employed in a 3×3 factorial arrangement with four replicates.Treatments consisted of three levels of irrigation water salinity(1.50,3.75,and 6.00 dS m^(-1))and three irrigation levels(50%,75%,and 100%of the estimated maximum crop evapotranspiration,ETc),corresponding to water deficits of 50%,25%,and 0%of ETc.Salinity stress resulted in similar electrolyte leakage in both years.In 2022,relative water content decreased with increasing salinity,whereas saturation deficit and water absorption capacity increased.The highest electrolyte leakage occurred under a 25%water deficit.In contrast,water-related physiological parameters in 2021 remained stable despite water deficits.Juice yield declined by 13.38%under the highest salinity level(6.00 dS m^(-1))compared with the lowest(1.50 dS m^(-1)).Under water deficit conditions,total yield,dry matter,stalk biomass,and juice yield were comparable between 0%and 25%water deficit,with significant reductions only at 50%.Overall,BRS 506 demonstrated resilience to salinity,maintaining cellular integrity.Despite adverse effects on plant water status at high salinity,total yield was unaffected.A 25%irrigation reduction resulted in only a 6.64%yield loss,indicating improved water use efficiency and highlighting the potential for sustainable cultivation of sweet sorghum in water-limited environments.展开更多
选用‘Mer72-3’等11个甜高粱品种幼苗为材料,用100 mmol·L-1 Na Cl进行处理,研究盐胁迫对其生长、光合荧光参数、离子含量及其盐害率的影响。利用模糊函数值法对盐处理下甜高粱苗期的10个生理指标进行综合评价,以筛选出耐盐性较...选用‘Mer72-3’等11个甜高粱品种幼苗为材料,用100 mmol·L-1 Na Cl进行处理,研究盐胁迫对其生长、光合荧光参数、离子含量及其盐害率的影响。利用模糊函数值法对盐处理下甜高粱苗期的10个生理指标进行综合评价,以筛选出耐盐性较强的甜高粱品种并为苗期耐盐性鉴定提供依据。结果表明,与对照相比,100 mmol·L-1 Na Cl处理下各甜高粱品种的鲜重、干重、株高、根长、Fv'/Fm'和ΦPSII及K+/Na+等指标均显著下降。盐处理下甜高粱根部干重盐害率的隶属函数值与总隶属函数值的相关系数(r=0.895)最大,为极显著水平(P<0.01)。因此,根部干重的盐害率可以作为甜高粱苗期筛选耐盐品种的一个重要参考指标。综合评价11个甜高粱品种耐盐强弱顺序为:‘Mer72-2’>‘甜选171’>‘济甜杂11-6’>‘绿能1号’>‘晋甜杂1号’>‘T-98’>‘济甜杂3号’>‘MN-94’>‘济甜杂2号’>‘戴尔’>‘Mer72-3’。展开更多
基金funded by the National Council for Scientific and Technological Development,CNPq.Notice 01/2016 process(432.570/2016-0)Research Support Foundation of Rio Grande do Norte-FAPERN,Process No.:10910019.000263/2021-43.
文摘Due to its tolerance to water deficit and salinity,sorghum is considered a suitable crop for cultivation in regions affected by these stress conditions,enabling the efficient use of limited water resources.This study evaluated the resilience of the sweet sorghum cultivar BRS 506 under water deficit and salinity stress,focusing on water relations and yield performance in semiarid conditions.A randomized complete block design was employed in a 3×3 factorial arrangement with four replicates.Treatments consisted of three levels of irrigation water salinity(1.50,3.75,and 6.00 dS m^(-1))and three irrigation levels(50%,75%,and 100%of the estimated maximum crop evapotranspiration,ETc),corresponding to water deficits of 50%,25%,and 0%of ETc.Salinity stress resulted in similar electrolyte leakage in both years.In 2022,relative water content decreased with increasing salinity,whereas saturation deficit and water absorption capacity increased.The highest electrolyte leakage occurred under a 25%water deficit.In contrast,water-related physiological parameters in 2021 remained stable despite water deficits.Juice yield declined by 13.38%under the highest salinity level(6.00 dS m^(-1))compared with the lowest(1.50 dS m^(-1)).Under water deficit conditions,total yield,dry matter,stalk biomass,and juice yield were comparable between 0%and 25%water deficit,with significant reductions only at 50%.Overall,BRS 506 demonstrated resilience to salinity,maintaining cellular integrity.Despite adverse effects on plant water status at high salinity,total yield was unaffected.A 25%irrigation reduction resulted in only a 6.64%yield loss,indicating improved water use efficiency and highlighting the potential for sustainable cultivation of sweet sorghum in water-limited environments.
文摘选用‘Mer72-3’等11个甜高粱品种幼苗为材料,用100 mmol·L-1 Na Cl进行处理,研究盐胁迫对其生长、光合荧光参数、离子含量及其盐害率的影响。利用模糊函数值法对盐处理下甜高粱苗期的10个生理指标进行综合评价,以筛选出耐盐性较强的甜高粱品种并为苗期耐盐性鉴定提供依据。结果表明,与对照相比,100 mmol·L-1 Na Cl处理下各甜高粱品种的鲜重、干重、株高、根长、Fv'/Fm'和ΦPSII及K+/Na+等指标均显著下降。盐处理下甜高粱根部干重盐害率的隶属函数值与总隶属函数值的相关系数(r=0.895)最大,为极显著水平(P<0.01)。因此,根部干重的盐害率可以作为甜高粱苗期筛选耐盐品种的一个重要参考指标。综合评价11个甜高粱品种耐盐强弱顺序为:‘Mer72-2’>‘甜选171’>‘济甜杂11-6’>‘绿能1号’>‘晋甜杂1号’>‘T-98’>‘济甜杂3号’>‘MN-94’>‘济甜杂2号’>‘戴尔’>‘Mer72-3’。
