摘要
以棉花为种植对象,连续2年进行了不同盐质量浓度海冰水灌溉试验,分析了不同盐质量浓度海冰水对棉花产量、土壤空间盐分动态运移变化以及棉花光合特性的变化.结果表明:利用本试验设定的不同盐质量浓度的海冰水灌溉,其棉花的产量都比对照要高,说明利用一定盐质量浓度海冰水灌溉能够缓解滨海盐碱地区的干旱问题.利用3 g.L-1的海冰水灌溉,对棉花的增产显著,同时又不会对滨海盐碱地土壤发生次生盐渍化,因此对滨海盐碱地来说,宜采用该盐质量浓度的海冰水灌溉棉田.在本试验设定的几个不同盐质量浓度的海冰水中,利用3 g.L-1的海冰水灌溉,棉花的气孔导度、净光合速率及细胞间CO2体积分数均达到最高水平,这是其能使棉花增产的部分原因.
In this work, sea ice water of different salinity was used to irrigate cotton for two consecutive years. Cotton yield, spatial dynamic migration changes of soil salinity and photosynthetic characteristics of cotton in different salinity sea ice water were analyzed. Data show that cotton yield irrigated by this experimentation is higher than without water irrigation. It proved that using certain salinity sea-ice water can mitigate drought problem of coastal saline-alkali region. Cotton yield increased significantly using 3 g·L^-1 sea ice water, at the same time it did not lead to secondary coastal saline-alkali soil salinization. For the coastal saline-alkali region, using 3 g· L^-1 sea ice water for irrigation resulted in the highest stomatal conductance, the highest net photosynthetic rate and the highest concentration of CO2 between cells, which are part of the reasons of increased cotton yield.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第1期72-75,共4页
Journal of Beijing Normal University(Natural Science)
基金
国家"863"计划资助项目(2006AA100206)
国家"863"计划重大专项资助项目(2004AA24020)
关键词
海冰水
产量
盐分
光合生理特性
sea ice water
yield
salinity
photosynthetic characteristics
