作物对“老固定态”铵的利用能力很弱。
直接的方法就是测定砂粒、粉粒和粘粒中的固定态铵含量。
The direct method is to determine the contents of fixed ammonium in sand, silt and clay.
固定态铵的含量不仅与土壤中的粘土矿物有关，施肥对其也有影响。
The content of mineral-fixed ammonium in soil was related not only to soil clay minerals but also to fertilization.
应用推荐