现代农业科技
現代農業科技
현대농업과기
XIANDAIHUA NONGYE
2014年
1期
232-236
,共5页
沼渣液%上清液%营养元素%影响因素
沼渣液%上清液%營養元素%影響因素
소사액%상청액%영양원소%영향인소
biogas residues and biogas slurry%supernatant%nutrients%impact factors
沼渣液还田效果良好，但在国内仍得不到充分利用，为探究原因，对上海市崇明县东部20个养猪场正常运行沼气工程沼渣液肥效、养分分布及肥效影响因素进行分析研究，并对部分测定指标进行相关性分析和一元线性回归拟合。结果表明，养猪场沼渣液营养元素含量丰富，可以作为一种优质的有机肥料，但其因地区、原料、发酵工艺及运行管理方面的差异对沼渣液养分含量的影响，使得其作为有机肥的肥效存在较大的不稳定性。沼渣和沼液中养分分布并不平均，沼渣中有机质、磷和微量元素含量较高，沼液中水溶性氮和钾的含量较高。沼渣液混合物部分测定指标间相关性显著，尤其是混合物全钾含量和混合物电导率，因素间一元线性回归模型拟合效果理想，在条件有限情况下，可由其中某一指标较准确估算其他测定指标的大小，减少测定工作量。
沼渣液還田效果良好，但在國內仍得不到充分利用，為探究原因，對上海市崇明縣東部20箇養豬場正常運行沼氣工程沼渣液肥效、養分分佈及肥效影響因素進行分析研究，併對部分測定指標進行相關性分析和一元線性迴歸擬閤。結果錶明，養豬場沼渣液營養元素含量豐富，可以作為一種優質的有機肥料，但其因地區、原料、髮酵工藝及運行管理方麵的差異對沼渣液養分含量的影響，使得其作為有機肥的肥效存在較大的不穩定性。沼渣和沼液中養分分佈併不平均，沼渣中有機質、燐和微量元素含量較高，沼液中水溶性氮和鉀的含量較高。沼渣液混閤物部分測定指標間相關性顯著，尤其是混閤物全鉀含量和混閤物電導率，因素間一元線性迴歸模型擬閤效果理想，在條件有限情況下，可由其中某一指標較準確估算其他測定指標的大小，減少測定工作量。
소사액환전효과량호，단재국내잉득불도충분이용，위탐구원인，대상해시숭명현동부20개양저장정상운행소기공정소사액비효、양분분포급비효영향인소진행분석연구，병대부분측정지표진행상관성분석화일원선성회귀의합。결과표명，양저장소사액영양원소함량봉부，가이작위일충우질적유궤비료，단기인지구、원료、발효공예급운행관리방면적차이대소사액양분함량적영향，사득기작위유궤비적비효존재교대적불은정성。소사화소액중양분분포병불평균，소사중유궤질、린화미량원소함량교고，소액중수용성담화갑적함량교고。소사액혼합물부분측정지표간상관성현저，우기시혼합물전갑함량화혼합물전도솔，인소간일원선성회귀모형의합효과이상，재조건유한정황하，가유기중모일지표교준학고산기타측정지표적대소，감소측정공작량。
Although the effect of biogas residues and biogas slurry returning to field is good ,they still cannot be used widely in China.The fertilizer efficiency ,distribution of nutrients and the impact factors of fertilizer efficiency of 20 biogas projects′ biogas residues and biogas slurry in Chongming County of Shanghai City were analyzed and parts of measurement indicators were correlation analysis and a linear regression fit.The results showed that pig farm biogas residues mixture were nutrient-rich and could be used as a high-quality organic fertilizer.But because of the difference in area,raw materials,fermentation technology and operation management,such organic fertilizer was not stable.Nutrients were not evenly distributed in biogas residues and biogas slurry ,higher levels of organic matters ,P and trace elements were detected in biogas residue and higher levels of water-soluble N and K were detected in biogas slurry.The correlations between some measurement indicators of biogas residues mixture were significant , especially between TK and conductivity.Linear regression model fitting results of parts of factors were satisfactory.So in some limited situations ,the size of the other measured indicators by one known indicator could be estimated which could reduce the determination workload effectively.
