不同种植年限玫瑰大棚土壤中养分变化研究

摘要

The accumulation status of soil organic matter,alkali-hydrolyzable nitrogen,available phosphorus and available potassium and the change of soil electrical conductivity and pH value in greenhouse were studied in the rose-planting soils of different planting years in Yuxi city,Yunnan province.The results showed that soil salinity,TP,available N,available P and available K increased gradually with the increase of planting years,while soil organic matter,pH,TN and TK decreased slowly with the increase of planting years.The physiochemical properties of the shed soil that was planted with rose year after year changed due to customary fertilization.With the longer continuous planting time,the more obvious changed.Defining the characteristics of the flower needed for fertilizer and combined with the actual conditions of greenhouse soil fertilization,is an important part of the benign cycle of flower cultivation.%以云南省玉溪市不同种植年限的玫瑰大棚种植土壤为研究对象,分析了土壤有机质、碱解氮、速效磷、速效钾等养分指标的累积状况以及土壤电导率、pH值的变化情况.结果表明,土壤盐分、全磷、速效氮、速效磷、速效钾含量随着种植年限的增加而逐渐增加,而土壤有机质、pH值以及全氮、全钾含量随着种植年限的增加有缓慢降低的趋势.连年种植玫瑰的大棚土壤理化性状发生改变是由习惯施肥所导致的,连种时间越长,变化越明显.明确花卉需肥特性,结合大棚土壤实际情况因地施肥,是花卉种植良性循环的重要环节.