干旱区覆膜滴灌条件下加工番茄对钙镁铁的吸收及分配规律研究

在覆膜滴灌条件下,研究了加工番茄在不同生育期对钙镁铁的吸收及分配规律,以及土壤在不同生育期的供肥规律.结果表明:(1)有效钙在同一生育期的吸收量为叶>茎>根>果;在不同生育期根和茎对有效钙的吸收规律相似,比较稳定;叶对钙的吸收,随着生育期的推移,逐渐升高.(2)有效镁在整个生育期分配于茎、叶中较多,根、果中较少;同时对有效镁的吸收,定植期各部位略高,其余各个时期又趋于稳定,变化幅度不大.(3)铁的测定由于污染原因,以致测试结果不能正确反映植株对铁的吸收规律.(4)土壤在不同生育期的供肥规律各不相同.

Research on the Law of Absorption and Distribution of Ca,Mg,Fe in Processing Tomato Plant under Plastic Mulched Drip Irrigation

In this paper,nutrient absorption and distribution of Ca,Fe,Mg in processing tomato were studied under plant mulched drip irrigation.The result indicated that(1)in a growthing stage,the content of Ca absorbed in leaf is more than in stem,root,and fruit.Along with growth stage goes on,the content of Ca becomes more and more.(2)In all growth stage,the content of Mg is increased more in stem and leaf than in root and fruit.As well as above,the content of Mg in transplanting stage is increased more than in other stages.(3)Because of the pollution,the content of Fe in plant can not be obtained by the normal absorption law.(4)In different stages,the concentration of Ca,Mg,Fe in soil is differential.