摘要
取养殖池塘的底泥和上覆水体于室内模拟水体小环境,设计:添加沸石、酶抑制剂、微生物、沸石与酶抑制剂组合、沸石与微生物组合五种处理与对照组进行5个月培养,分析培养前后底泥中有机态磷组分、有效磷及上覆水体有效磷含量。试验结果表明,两个养殖池塘底泥中有机磷各组分含量依次为MLOP>MROP>HROP>LOP,MLOP、LOP含量经过微生物和对照处理之后的减少量最大,而酶抑制剂处理减少最少,MROP含量微生物及与沸石组合处理增加,其余均有所下降,HROP含量所有处理中几乎不变;两池塘底泥对上覆水有效磷的贡献具有相同的规律,MLOP的贡献率最大,其次为LOP,MROP居于第三,HROP没有贡献;底泥中和上覆水体中的有效磷与LOP和MLOP之间呈显著正相关,与MROP和HROP之间相关不显著。底泥中各组有机磷对底泥中和上覆水体中有效磷的直接通径系数大小为MLOP>LOP>HROP>MROP。
The sediments and overlying water were placed under room experimental environment. taken： zeolite, enzyme inhibitor, microbe, zeolite and enzyme inhibitor, zeolite and microbe. Five treatments were Organic phosphorus fractions, available-P in the sediments and available-P in the overlying water were analyzed before and after cultured. The results showed that the order of organic phosphorus fractions in two ponds was MLOP 〉MROP 〉 HROP 〉LOP. The contents of LOP and MLOP decreased the most in microbe treatment and control, but they decreased the less in enzyme inhibitor. The contents of MROP increased in microbe, zeolite and microbe, but decreased in other treatments. The contents of HROP almost remained unchangeable in all treatments. The sediments in two ponds performed the same principle on the contributions to the phosphorus of overlying water： MLOP contributed most, followed by LOP, and MROP while HROP had no contribution. In the overlying water and the sediments, available phosphorus were positively correlated with LOP, MLOP and insignificantly correlated with HROP and MROP. The direct path coefficient index of the available phosphorus affected by organic phosphorus, which existed in sediments and overlying water, were MLOP〉 LOP〉 HROP〉 MROP.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第1期112-116,共5页
Chinese Journal of Soil Science
基金
天津市自然基金重点项目(07JCZDJC04600)
天津市教委基金项目(20060708)资助
关键词
不同处理
池塘
底泥
有机磷组分
Different treatment
Ponds
Sediment
Organic phosphorus
