科学家利用的微生物名叫棕色固氮菌(Azotobactervinelandii),它们存在于各种粮食作物的根系。
固氮菌数量在棉花苗期和花蕾期随种植年限变化有显著差异。
相同茶龄的土壤中固氮菌的数量随土壤肥力的降低而减少;
1·The compound fertilizer improved the population of azotobacter and potassium bacteria, and the phosphate ammonium enhanced the population of phosphobacteria.
复合肥有利于提高固氮菌和钾细菌数量,磷酸铵促进了磷细菌数量的增长。
2·As to same tea age, the population of azotobacter became smaller with the soil fertility decrease.
相同茶龄的土壤中固氮菌的数量随土壤肥力的降低而减少;