长期施肥及覆膜栽培对土壤锌、铜、锰的形态及有效性影响的研究

通过在沈阳棕壤上的5年定位试验,对不同施肥处理土壤进行锌、铜、锰各形态系统分析,结果表明：覆膜栽培加剧了土壤中锌、铜、锰各形态的消耗,不同施肥处理,三种元素各形态含量存在较大差异,土壤有机态锌、铜,氧化物结合态铜,交换态锰,碳酸盐结合态锰是玉米吸收的主要形态。

EFFECTS OF LONG-TERM FERTILIZATION AND PLASTIC SHEET-COVERED CULTURE ON FORMS OF Zn, Cu AND Mn IN SOIL AND THEIR AVAILABILITY

A systematic study concerning the effects of persistent fertilization and plastic sheet-covered culture on forms of Zn, Cu and Mn in a brown soil of Shenyang was conducted. The results showned that the consumptions of various forms of Zn, Cu and Mn increased after plastic sheet-covered culture. The forms of these three elements varied greatly in different fertilization treatments. The major forms absorbed by corn from soil were ogranic Zn and Cu, oxide bound Cu, exchangeable Mn and carbonate bound Mn.