日光温室土壤速效养分剖面分布和累积特征研究  

Characteristics of Available Nutrients Distribution and Accumulation in Greenhouse Soil Profile

作　　者：吕福堂[1] 张秀省[1] 董杰[1] 

机构地区：[1]聊城大学农学院,山东聊城252000

出　　处：《土壤通报》2010年第5期1110-1114,共5页Chinese Journal of Soil Science

基　　金：山东省教育厅科技计划项目资助(J08LF01)资助;山东省自然科学基金项目资助(Y2006E02)

摘　　要：为了解日光温室土壤速效养分剖面分布和累积特征,测定了不同种植年限日光温室不同层次土壤速效养分,结果显示:日光温室土壤硝态氮含量剖面分布均呈倒梯形分布,5、10和14年日光温室0～100 cm土层硝态氮累积总量分别为是相邻粮田的4.3、5.8和7.1倍。5、10和14年日光温室表层土壤速效P含量均超过200 mg kg-1,0～100 cm土层土壤速效P积累总量分别是温室外粮田的6.2、13.2和18.0倍,5年低龄温室土壤速效P剖面分布为丁字形,10年以上高龄温室土壤速效P剖面分布均为倒梯形。5、10和14年日光温室表层土壤速效K的含量均超过300 mg kg-1,0～100 cm土层土壤速效K累积总量分别是温室外粮田积累量的1.8、2.9和4.4倍,日光温室土壤速效K剖面分布均为倒梯形。5年温室土壤水溶性P含量呈丁字型分布,10年以上温室土壤水溶性P含量分布呈现倒三角,逐渐向倒梯形发展,不同年限温室水溶性K含量剖面分布均呈倒梯形分布。日光温室土壤速效养分的富集率为速效P>硝态N>速效K,低龄温室土壤养分表层富集为主,而高龄温室中下层积累量所占比例逐渐增加。In order to know the characteristics of available nutrients distribution and accumulation in greenhouse soil profiles,available nutrients in different soil layer in greenhouse with different planting years were measured.The results showed that nitrate nitrogen content in greenhouse soil profile distributed like an ＂inverse trapezoid＂,total content of nitrate nitrogen accumulation in 0-100 cm in greenhouse soil profile with 5,10 and 14 planting years were 4.3,5.8 and 7.1 times greater than that in neighboring field.Available phosphorus in topsoil was over 200 mg kg-1 in greenhouse after planting 5,10 and 14 years in greenhouse,available phosphorus accumulation in 0-100 cm soil profile were 6.2,13.2 and 18.0 times greater than that in neighboring field respectively.Contents of available potassium in 5,10 and 14 year-planted greenhouse were over 300 mg kg-1,and distributed like an ＂inverse trapezoid＂.The total concentrations of available potassium accumulated in soil profile were 1.8,2.9 and 4.4 times greater than that in neighboring field.Distribution of water-soluble phosphorus in 5 year-planted greenhouse was a ＂T-bar＂ and an ＂inverse triangle＂ after 10 years planting,and then developed to an ＂inverse trapezoid＂ gradually.Distribution of water-soluble potassium was an ＂inverse trapezoid＂ after different planting years in greenhouse.Accumulation rates of different soil available nutrients displayed as available P nitrate nitrogen available K.Available nutrients accumulated at surface layer in low-aged greenhouse,and the proportion of nutrients accumulation increased in deep soil layer in old-aged greenhouse.

关 键 词：日光温室 速效养分 剖面分布 累积特征 

分 类 号：S158[农业科学—土壤学]