河西走廊日光温室不同建棚年限土壤养分及重金属残留研究  

The Study of Soil Nutrient and Heavy Metals in the Soil of Sunlight Greenhouse with Different Building-up Ages in Hexi Corridor

作　　者：李瑞琴[1] 于安芬[1] 车宗贤[2] 邱慧珍[3] 赵有彪[1] 苏永生[1] 刘柱 

机构地区：[1]甘肃省农业科学院畜草与绿色农业研究所,甘肃兰州730070 [2]甘肃省农业科学院土壤肥料与节水农业研究所,甘肃兰州730070 [3]甘肃农业大学,甘肃兰州730070 [4]甘肃省武威市凉州区蔬菜产业办公室,甘肃武威733000

出　　处：《土壤通报》2010年第5期1165-1169,共5页Chinese Journal of Soil Science

基　　金：财政部国家社会公益项目绿色农业科学研究示范项目(2007-04);暨国家科技支撑项目"高原夏菜高效安全生产及保鲜加工关键技术研究与示范"资助

摘　　要：通过测试分析凉州区建棚年限5~14年的日光温室土壤养分、理化性质及重金属残留现状,并将各项指标与露地大田相比较,总体表现是建棚年限在5年以上的日光温室土壤养分明显增加,土壤有机质、全氮、全磷、碱解氮、有效磷、速效钾均表现明显的累积,分别比露地农田高出3.18 g kg-1,0.48 g kg,8.73 mg kg-1,98.38 mg kg-1,45.83 mg kg-1和230.88 mg kg-1;土壤微量元素也比露地大田明显增加,同时土壤盐分及重金属砷、汞的残留也呈现明显的累积趋势,但尚未超出阻碍作物生长的指标范围。Liangzhou District in Hexi Corridor in Gansu is one part of the Green Agricultural Demonstration Zone that was firstly found in Arid Region of Northwest China in April of 2006.This study is based on the idea of green agriculture.The soil nutrients＇ and heavy metals＇ contents and physico-chemical properties in the greenhouse were investigated,and the comparisons of the above measurements between the greenhouse and open fields were also conducted.The results showed that the greenhouse of soil organic matter,total N,total P,hydrolytic N,available P and available K were higher than those in the open fields,with the increase of 3.18 g kg-1,0.48 g kg-1,8.73 mg kg-1,98.38 mg kg-1,45.83 mg kg-1 and 230.88 mg kg-1,respectively.The contents of soil trace elements in greenhouse were also higher than those of the open fields except for B and Mn.The older the greenhouse,the higher the content of available P,available K were investigated.The electric conductivity（EC） in greenhouses was about four times as high as that in the open fields.The contents of soil heavy metals such as As and Hg in the greenhouse were higher than those in the open fields.However,the values of soil EC and heavy metals＇ contents in the greenhouse soil did not reach the harmful level to inhibit the crop growth in the study region.

关 键 词：河西走廊 日光温室蔬菜 建棚年限 土壤养分 重金属 

分 类 号：S158.3[农业科学—土壤学] S158.4[农业科学—农业基础科学]