城市污泥堆肥对栽培基质保水能力和有效养分的影响  

Effects of Sewage Sludge Compost on Available Nutrients and Water Retention Ability of Planting Substrate

作　　者：陈同斌[1] 高定[1] 李新波 

机构地区：[1]中国科学院地理科学与资源研究所环境修复室,北京100101

出　　处：《生态学报》2002年第6期802-807,共6页Acta Ecologica Sinica

基　　金："九五"国家重大科技攻关资助项目 ( 96 -90 9-0 1 -0 5 );北京市政府公开招标采购资助项目 ( 1 9990 91 2 )

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 。Sewage sludge compost is a kind of excellent fertilizer due to its abundant nutrition and organic matter. After composting, the sewage sludge could be sold as a commodity to make profits that could be improved by adding inorganic fertilizer. So land application has become one of the best ways for sewage sludge, especially for the developing countries with limited cultivated lands, expanding land application of sewage sludge is very essential with the precondition of resolution of pathogen, vector, and heavy metal.Lots of studies have being done on the effects of sewage sludge compost on plants and environment. Some researches reported that total N, total P and organic matter of surface soils were enhanced by the application amount of sewage sludge compost. When sewage sludge compost was used as the substrate of container breeding, the chemical and biological properties of soils were improved. Few studies on the effects of sewage sludge compost on water retention ability of planting substrate have been reported by now.In order to study the effects of sewage sludge compost on water retention ability and soil nutrient availability of planting substrate, pot experiment growing wheat was carried out in the greenhouse. Three experimental series were designed as follows: (1) Series I——the growing substrate without plant was incubated for 30 days, and investigated the moisture of growing substrate, available N and P on day 30; (2) Series II——wheat plant was grown for 30 days, and investigated the soil moisture, available N and P on day 30; (3) Series III——wheat plant was grown for 30 days, and the dynamics of the moisture of growing substrate and wilting point of the plant were tested until the wheat went to death due to lacking of water after stopping the irrigation on day 30. Each series consisted of five treatments, i.e., treatment 1 (100% soil), treatment 2 (25% compost + 75% soil), treatment 3 (50% compost + 50% soil), treatment 4 (75% compost + 25% soil), treatment 5 (100% compost). The results showed

关 键 词：城市污泥堆肥 栽培基质 保水能力 盆栽基质 有效养分 萎焉点 

分 类 号：X703[环境科学与工程—环境工程]