翻译为英文：也有研究发现增减30的降水对氮转化速率没有显著影响但是增减60的降水会显著改变土壤总铵化和总硝化速率

Some studies have also found that a 30% increase or decrease in precipitation does not significantly affect nitrogen transformation rates, but a 60% increase or decrease in precipitation can significantly alter the total ammonification and total nitrification rates of the soil.