The Effect of Cobalt on Growth of Tomato

A pot experiment of single factor was carried out to determine the effect of trace element Co on the growth and yield of tomato.It was shown that Co significantly increased the content of chlorophyll and the numbers of flower bud,but had little effect on plant height,complex leaf number and the dry matter weight of root.It was evident that cobalt was able to promote the number of fruit and yield.The content of Co in the different organs of tomato and the available Co of the soil were both obviously improved with the increasing application of Co.In our experiment,the maximum concentration of Co did not play a positive role on the growth of tomato.