城市污泥堆肥对栽培基质保水能力和有效养分的影响

被引:73
作者
陈同斌
高定
李新波
机构
[1] 中国科学院地理科学与资源研究所环境修复室
关键词
城市污泥; 盆栽基质; 有效养分; 萎焉点; 保水能力;
D O I
暂无
中图分类号
X703 [废水的处理与利用];
学科分类号
摘要
盆栽试验表明 ,城市污泥堆肥不仅可以明显提高栽培基质的有效氮、磷含量 ,而且可以增强栽培基质的保水性能和植物的抗旱能力 ,但是栽培基质的萎焉点也随着其用量的增加而增高。因此 ,从保证植物水分供应的角度考虑 ,虽然可以大量地使用城市污泥堆肥 ,但是其用量并不是越多越好 ;当用量超过 75 %时 ,继续增加城市污泥堆肥的比例 ,则植物的吸水能力反而会略有下降。从养分供应和保水性能等角度综合考虑 ,采用经过堆肥化处理的城市污泥作为植物栽培基质 ,是城市污泥资源化和无害化的可行途径
引用
收藏
页码:802 / 807
页数:6
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