The research on the effect of different of straw instead of nitrogen fertilizer on soil fertilizer efficiency

To look for alternative fertilizer products, the application of wheat straw was explored in different forms instead of chemical fertilizer. The N, P, K, organic matter, humus, pH, germination rate in soil were determined to observe the effect on soil fertility. The results indicate that biochar had the best effect on soil fertility when straw was returned to the field in different forms; the effect of biochar on increasing the content of soil organic matter and humus was more obvious than the nitrogen fertilizer; biochar has little difference in total potassium; biochar has the most obvious effect on increasing the content of total nitrogen and available phosphorus. As a new type of fertilizer, biochar can replace chemical fertilizer which causes damage to soil environment. Biochar has the ability of fixing carbon and can slow down the greenhouse effect.