Study On The Root Growth Of Lycospersicon Esukurentamu In Different K⁺ And La³⁺ Concentrations

The experiment was carried out to investigate the effects of the major element potassium and trace element lanthanum on the root growth of Lycospersicon Esukurentamu. In order to solve the problems in plug seedlings factory production, searching an effective utilization of substrate fertility and avoiding the environmental contamination caused by excessive fertilizer application. The results were as follows:1. In the germination experiment, the germination declined first then increased when K⁺ increasing concentrations. La³⁺ has negative effect on germination, as the concentration increasing, the germination first increased then decreased. But the inhibition will increase at a high concentration.2. K⁺,La³⁺ can inhibit the root length under different concentrations, but the surface area, volume, diameter, number of tips and the branches of the root all increased. K⁺ has significant effects on increasing the volume and diameter of root, but the main effects of La³⁺ application are increasing the number of tips and branches of the root.3. The growth of ground parts improving by increasing the K⁺ concentration, but the effectiveness isn't significant. The growth first increased then decreased at increasing La³⁺ concentrations, but totally La³⁺ can inhibit the growth of ground parts . Take together, K⁺ can promote the growth of ground parts, conversely La³⁺ can significant promote the growth of root.4. K⁺,La³⁺ significantly increased the soluble sugar content and protein content of root at different concentrations. The relative enzymes activity have close relation with root soluble sugar content and protein content, and the variation tendency is as same as sugar and protein. 5. The effects of K+,La³⁺ on soluble sugar content and protein content have shown consistent trending in leaf and root .