摘要
利用盆栽试验研究了4个施肥水平条件下污泥堆肥单施(S)、污泥堆肥—尿素配施(S+U)以及尿素单施(U)三因素对芹菜产量、土壤肥力性状的影响,同时研究了污泥堆肥的氮、磷矿化和供应特点。结果表明,与对照相比,不同用量的尿素单施没有显著提高芹菜产量,而施用污泥堆肥条件下,无论是单施还是配合尿素施用均显著增加了芹菜产量,单施污泥堆肥增产幅度为12.6%～34.0%,污泥堆肥配合尿素施用增产幅度为14.2%～18.2%。随着污泥堆肥、尿素等肥料用量的增加,芹菜硝酸盐含量显著增加。在单施条件下,污泥堆肥氮、磷矿化率分别为15.43%～22.75%和1.35%～7.28%,在配施尿素条件下,污泥堆肥氮、磷矿化率分别为13.16%～26.37%和1.21%～7.31%。在施氮量为0.15～0.38gkg-1土壤时,等氮量施用条件下,氮肥利用率表现为S>S+U>U。施用污泥堆肥可以较大幅度地提高土壤速效氮、磷的含量,同时导致土壤pH值下降,大量施用也会引起土壤盐分的累积。
A pot experiment with four fertilization levels and three kind of fertilizer application formulas including sewage sludge compost only （S） , sewage sludge compost and urea apply together （S＋U） , urea only （U） had been established to study the nitrogen and phosphorus mineralization character of the sewage sludge compost, and to analyze effect of differenti fertilization methods on soil fertility and celery growth. The results demonstrated that all the four fertilization levels of U treatment did not enhance celery yields significantly at the 0.05 level compared to the control treatment. In contrast, either S or S＋U treatments both increased the yields obviously, while S treatment increased yield by ranges of 12.6% to 34.0%, and S＋U by ranges of 14.2% to 18.2%. The more fertilizer amounts applied the higher nitrate accumulated in fresh celery sample among three treatments. In the condition of applying sewage sludge compost only（S） the mineralization rates of N, P range from 15.43% to 22.75% and 1.35% to 7.28%; and when sewage sludge and urea applying together （S＋U）, the two elements mineralization rates range from 13.16% to 26.37% and 1.21% to 7.31%, respectively： While net N dose from 0.15 to 0.38g per lkg soil, in the term of equal net N basis application, the N recovery sequence from high to low is S〉S＋U〉U. Application of sewage sludge compost resulted in increase of soil available N, P content and decrease of pH value, meanwhile it＇s large dose application can also lead to salinity accumulation in the soil.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第4期833-837,共5页
Chinese Journal of Soil Science
基金
北京城市排水集团有限责任公司合作项目"长期施用污泥的农学及环境效应研究"
北京市重大科技项目"多功能肥料/基质研究与开发(D0706004040431)"资助
关键词
污泥堆肥
芹菜
氮
磷
矿化
产量
Sewage sludge compost
Celery
Nitrogen
Phosphorus
Mineralization
Yield
