Three typical soil protozoa of Bodo edax, Colpoda cucullus and Amoeba proteus were inoculated into the soil amended with......

<正> 土壤碱解氮作为评定土壤氮素肥力供给能力的指标,A.H.Cornfield（1960）曾报道应用J.M.Bremner-K.J.Shaw（1955）改进的康威皿微量扩......

<正> 利用 NO_3-N 提高营养液氮素浓度,对水培白菜增加产量具有有限性,并在白菜中会过多积累硝酸盐。前人对黄瓜、生菜、结球白菜......