5Chandhry F M, Loneragan J F： Zinc absorption by wheat seedling： II : Inhibition by hydrogen ions and microelement cations[J]. Soil Sci Soc Am Proc, 1972, 36: 327-331.
6Chandi K S, Takkar P N.Effects of agricultural cropping systems on micro nutrient'stran formation. I. Zinc： Plant and Soil, 1982, 69 : 423-436.
7Chaudhry F M, Loneragan J E. Zinc absorption by wheat seedlings. I : Inhibition by macronutrient ions in short-term experiments and itsrelevance to long-term zinc nutrition[J]. Soil Sci Soc Am Proc,1972, 36: 323-327.
8Chaudhry F M, Loneragan J F： Zinc absorption by wheat seedlings I : Inhibition by macronutrient ions in short-term experiments and its relevance to long-term zinc nutrition[J]. SoilSci.Soc.Am. Proc.1972, 36:323-327.
9Wells B R. 1980. Zinc nutrition of rice growing on Arkansas soils [M]. Fayetteville, AR: Ark Agric Exp Stn Bull Univ of Arkansas, 1980: 848.
