通过温室盆栽试验,研究了污水灌溉和镉(Cd)胁迫对菠菜叶绿素、Vc、蛋白质、可溶性糖和亚硝酸盐含量的影响.试验共设10个处理,每个处理个重复.分别以清水和污水作对照,以清水和污水配制不同Cd2+浓度的溶液,对菠菜进行浇灌和喷洒处理.结果显示,与清水对照和污水对照相比,随Cd2+处理浓度的增大,菠菜叶绿素、Vc、蛋白质和可溶性糖的含量逐渐降低,亚硝酸盐的含量逐渐增大.Cd2+浓度相同的污水处理与清水处理相比,污水处理蛋白质、可溶性糖和亚硝酸盐含量显著增大,Vc和叶绿素含量显著减小.污水灌溉和Cd胁迫可使菠菜叶绿素、Vc、蛋白质和可溶性糖含量降低,亚硝酸盐含量升高,菠菜品质变差.
Effects of sewage irrigation and cadmium stress on the content of chlorophyll,Vc,protein,soluble sugar and nitrite in spinach have been studied through pot experiment,which included ten treatments with four repeats.Using water and sewage as control,the water and sewage solutions with various concentrations of Cd2+ were used to irrigate spinach.The results indicated that,compared with the water and sewage control,the content of chlorophyll,Vc,protein and soluble sugar decreased and the content of nitrite increased with the rise in concentration of Cd2+.Compared with the treatment of water,under the same concentration of Cd2+ press,the content of protein,soluble sugar and nitrite in spinach treated by sewage increased significantly.However,the content of Vc and chlorophyll decreased significantly.The combined effects of sewage irrigation and Cd press lead to the content of chlorophyll,Vc,protein and soluble sugar in spinach increased,in contrast,the nitrite decreased,the spinach quality deteriorated.
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