EXTRACTABILITY OF￣(15)N LABELLED PLANT RESIDUES IN SOIL BYELECTRO-ULTRAFILTRATION(EUF)
EXTRACTABILITY OF￣(15)N LABELLED PLANT RESIDUES IN SOIL BYELECTRO-ULTRAFILTRATION(EUF)
电超滤法（EUF）浸提测定15N标记植物残体有机氮和无机氮的转化
EXTRACTABILITY OF￣(15)N LABELLED PLANT RESIDUES IN SOIL BYELECTRO-ULTRAFILTRATION(EUF)
电超滤法（EUF）浸提测定15N标记植物残体有机氮和无机氮的转化