Effects of different activation processes of humic acids on the growth of oilseed rape

Humic acid is an organic matter found in nature, which has a good effect on plant growth, widely used in agriculture. Extract Humic acid from lignite in different method get different Humic acid. In this study we preparation of Humic acid by alkali-soluble acid precipitation method. Different effects of Humic acid prepared by different activation processes so do a promote comparison. Humic acid was produced from lignite used alkali compared different activation process with PH of 6 and 12. The activation rate was 9.6% and 24.6%. Respectively we explored the effects of Humic acids along with inorganic fertile on oilseed rape. The results showed that usage of the two kinds of Humic acids together with inorganic fertile had better effects than the single formula. Besides, the promote effect of Humic acid with PH of 6 was better than PH of 12.