salinity of irrigation water meaning in Chinese

灌溉水的含盐度
灌溉水的盐度
灌溉水含盐度

The stem of helianthus tuberosus ( l . ) had the ability of containing high contents of na + and cl - , and selectively absorbed k + in high proportions seawater irrigation ; the above and tubers yields of helianthus tuberosus ( l . ) had n ' t decreased until at the 50 % proportions seawater irrigation where the yields decreased by 37 % and 32 % in contrast to freshwater - irrigated . it meant that through natural weather , reduction of yields was occurred by salinity of irrigation water but the reduction was not significant until the proportions of seawater in irrigation water were the same as 50 % or above it
海水灌溉下，菊芋的茎部具有明显的贮cl ~ - 、 na ~ +能力，在高浓度海水灌溉下菊芋整个植株对k ~ +具有较高的选择吸收性；菊芋地上部和块茎产量在30海水处理范围内，没有减产趋势，在50海水灌溉下减产幅度分别为37和32 ；可见，正常自然条件下的海水灌溉，对产量的影响主要和灌溉水的浓度有关，但只有在50处理下才显著减产，低于50产量并无差异。