德惠市农田黑土肥力评价及施肥措施研究

对吉林省德惠市黑土农田土壤5项指标综合评价的结果表明,土壤速效钾含量、阳离子交换量处于良好级,速效磷含量、土壤有机质含量处于中等级,全N含量处于差级,pH在不同地块差异明显。土壤保肥、耐肥性能好,但土壤肥力严重退化。因此,在施肥上应遵循增施有机肥,增N、控P、保K,配合施用中微量元素的原则,保持黑土的持续生产能力。

Evaluation on black soil nutrients and fertilization recommendation in Dehui City

A comprehensive evaluation on black soil nutrients was conducted with five indexes. The results show that the available K and CEC are abundant,available P and organic matter are medium and total N content is lack,pH is different among every plot. Nutrient preserving capability and fertilizer response are fine,but soil fertility degrades seriously.Thus, more manure,increased N,controlled P,retained K,and a suitable amount of trace element fertilizer should be applied in Dehui City to keep the sustainable productivity of black soil.