生态产业科学与磷氟工程

通过田间试验、相关分析研究了松嫩平原黑土和黑钙土的锌肥有效施用条件。结果表明 :当土壤 p H>7.2、石灰含量 >3.9%、砂粒含量 >40 %、代换量 <15 cm ol/ kg、有机质含量 <2 %、土壤有效锌含量低于缺锌临界值0 .8m g/ kg时 ,施用锌肥具有明显的增产效果。而在高磷情况下会降低土壤锌有效性 ,易引起玉米缺锌加重。吉单10 1和四单 8两个玉米品种对锌缺乏最为敏感。

The soil conditions of effective application of Zinc fertilizer was carrid out through pot and field experiments with black soil and steppe black soil in Songnen Plain, northeast China. The results show that the soil condition are soil's pH>7.2, the content of soil's CaCO\-3>3.9%, the content of soil's sand>40%, C.E.C.<15 cmol/kg, O.M.<2%. And when available Zinc is less than the critical value of 0.8 mg/kg, available soil's Zinc is lowered, which aggravated Zinc deficiency under the condition of high rates of P fertilizer. Jidan 101 and Sidan 8 are the most sensitive to Zinc deficiency among the varieties of maize.