Abstract: Through field experiments and large scale demonstration,the improvement effect of canada calcium carbonate volcanic salt rock (SRC) on acidified soil and its yield increasing effect on cabbage were verified.The product has good effect on improving the acidified soil.The results show that600~1800 kg/hm² can increase the pH of soil by 0.07~0.28 units in the current season.SRC can also reduce the exchangeable aluminum contentin the soil,reduce the aluminum toxicity in the acid soil,increase the cation exchange capacity of the soil,enhance the ability of supplying and maintaining fertilizer,and increase the exchangeable calcium and magnesium content of the soil.It can reduce the content of available iron and availablemanganese in soil,so as to alleviate soil acidification.On the basis of conventional fertilization,the yield of cabbage can be increased by increasing the amount of SRC.The yield of cabbage can be increased by more than5% when1200 kg/hm² is used;The yield of cabbage can be increased by more than10% when1800 kg/hm² is used,and reached a significant level.

Key words: calcium carbonate volcanic salt rock(SRC), acidified soil, cabbage, application effect