设施栽培条件下土壤养分及有机质组成变化趋势的研究

以黄泛平原壤质潮土不同年限的设施栽培土壤为研究对象,探讨了设施栽培条件对土壤养分及土壤有机质组成的影响。结果表明,设施栽培土壤碱解氮、速效磷、速效钾、盐分含量均明显高于大田,其含量主要取决于施用化学肥料的种类和数量,随栽培年限的增加而增加;土壤有机质、腐殖酸、胡敏酸含量随种植年限有升高趋势;HA/FA与栽培年限显著相关,表示设施栽培条件下,土壤熟化程度随有机肥料的逐年施用而有所提高,但HA/FA变化幅度不大,这可能与设施栽培形成的高温高湿条件及施用有机肥料中难分解物质的含量有关。

Study on Soil Nutrient and Organic Matter Composition Changing Tendency of Protected Cultivation

In this paper,loamy fluvo-aquic soil of Huang-the depositing plain which used by the way of protected cultivaion for different planting years were studied.The soil nutrient and organic matter had changed under this cultivition system.The results showed that the content of available nitrogen,phosphorus and potassium were higher than uncovered soil.The contents were connected with the species and quantity of in organic fertilizer application and increasing with the cultiviting time.The level of organic matter,humus and humic acid increased correspondingly.HA/FA increased with the planting years.It showed that the soil fertility rising with organic manure used yearly.But HA/FA did not vary much more than uncovered soil,this may be associated with the high temperature and high humid condition under protected cultivition and the content of complex matter in organic manure.