陕北沙地改良中土壤肥力变化  

Changes of Soil Fertility in the Improved Sandy Land in North of Shaanxi Province

作　　者：张晖 马超群[2] 赵永华[2] 解蕾 

机构地区：[1]陕西省土地整理中心,陕西西安710000 [2]长安大学地球科学与资源学院,陕西西安710054

出　　处：《安徽农业科学》2016年第22期145-148,共4页Journal of Anhui Agricultural Sciences

基　　金：陕西省国土资源厅沙地整治节水灌溉研究项目(214029140183);教育部项目(12XJC840001);中央高校基金项目(2013G6274063;2013G1271094)

摘　　要：[目的]研究陕北沙地改良中土地肥力条件变化,为更好地促进农业生产提供依据。[方法]测定了陕北沙地、新改良地、多年耕种改良地和耕作熟地中土壤水分、温度及有机质、全氮、速效磷、速效钾和全盐含量等指标,分析了土壤肥力变化状况。[结果]土壤水、温与改良状态和灌溉方式有较高相关性,呈现出无灌溉设施的改良地高于沙地,无覆膜有灌溉设施的田块高于无灌溉设施田块,覆膜田块高于未覆膜田块;改良地的有机质、全氮、速效钾、全盐等养分指标含量均优于未改良沙地,且除速效磷外,各养分指标呈随农业利用历史增长而增加的趋势。[结论]通过改良可以有效改善陕北沙地土壤质量,提高肥力;合理的农业生产措施可以进一步提高改良地土壤肥力水平。[Objective] To research the changes of soil fertility condition in sandy land improvement of north of Shaanxi Province, and to provide references for the better promotion of agricultural production.[Method] Sandy land in north Shaanxi Province, newly improved land, improved land after years of farming, and cultivated land were collected to detect the indexes of soil water, temperature, organic matter, total nitrogen, rapidly-available phosphorus, rapidly-available potassium,total salt and so on.The change status of soil fertility was analyzed.[Result] Soil wa-ter, temperature and improved status had relatively high correlation with irrigation method, showing that the improved land with no irrigation fa-cility was higher than the sandy land.Land with irrigation facility but no membrane was higher than that with no irrigation facility; land with membrane was higher than that with no membrane.Contents of nutrient indexes （organic matter, total nitrogen, rapidly available potassium, total salt and so on） of the improved land were superior to the unimproved sandy land.Except the rapidly-available phosphorus, nutrient indexes en-hanced along with the historical growth of agricultural use.[ Conclusion] Soil quality of sandy land in north Shaanxi Province is effectively im-proved;and the fertility is enhanced.Reasonable measures of agricultural production can further enhance the fertility level of improved soil.

关 键 词：沙地 土壤肥力 土壤养分 土壤水分 陕北 

分 类 号：S158[农业科学—土壤学]