What's the effect of Sodium humate?
With sodium humate and water retaining agent in different proportions, the application effect of lettuce was studied. The test results showed that compared with the control, the simultaneous application of sodium humate and water retention agent showed a positive effect on the growth of lettuce, and the plant height of the three experimental groups increased by 20.63%, 46.87%, 58.75%, and the yield increased by 38.4%. ~61.3%, reaching a significant level; in terms of quality, the Vc content of lettuce in the three experimental groups increased by 17.25%, 28.6%, and 46.54% compared with the control, and the crude protein content increased by 16.25%, 48.01%, and 34.46%, respectively. Nitrate content decreased by 19.68%, 28.37%, and 33.62%, respectively. The application of 7:3 sodium humate and water retention agent was the best under the condition of equal nitrogen, phosphorus and potassium nutrients.