长期定位施有机肥对西北半干旱区土壤酶活性的影响  

Effect of Long-term Located Organic Fertilization on Soil Enzyme Activity in Semi-arid Areas of Northwest China

作　　者：卫天业[1] 张鹏[2] 杨成元[1] 卫婷[2] 杨斌 魏效春 

机构地区：[1]山西省农科院经济作物研究所,山西汾阳032200 [2]西北农林科技大学中国旱区节水农业研究院,陕西杨凌712100 [3]彭阳县水务局,宁夏彭阳756500

出　　处：《西北农业学报》2015年第1期130-136,共7页Acta Agriculturae Boreali-occidentalis Sinica

基　　金："十一五"国家科技支撑课题"农田集雨保水关键技术研究"(2006BAD29B03)及"节水共性技术研究"(2007BAD88B10)

摘　　要：为了探明长期施用有机肥对旱地土壤酶活性的影响,为旱地土壤改良技术体系的建立提供依据。在宁南旱区进行3a有机肥定位施用试验,设置3个有机肥施用量水平：30 000kg/hm^2（L）、60 000kg/hm^2（M）和90 000kg/hm^2（G）,以不施有机肥作为对照（CK）。结果表明,长期施用有机肥对0～20cm土层土壤脲酶、磷酸酶、蔗糖酶影响较为显著,特别是高量有机肥处理,3a较对照平均提高幅度分别为127.7%、26.1%和19.5%;各有机肥处理0～20cm土层土壤脲酶、磷酸酶活性大小顺序基本为G≥M〉L≥CK,G和M处理效果最显著,3a较对照分别提高（P〈0.05）32.5%～197.2%和16.7%～34.8%;各有机肥处理过氧化氢酶变化规律不明显,基本维持在8.07～9.48U4。说明,旱地施有机肥对提高一些土壤酶活性有显著效果。Effect of long-term organic fertilization on soil enzyme activity in arid area was studied in the paper,so as to provide technical system for soil improvement in semi-arid areas of southern Ningxia.The experiment of long-term located organic fertilization had been done in arid area of Ningnan for3 years.With unorganic fertilization as CK,3different treatments of organic fertilizer application（G：90 000kg/hm^2,M：60 000kg/hm^2 and L：30 000kg/hm^2）,the result showed that urease,phosphatase and invertase activities under G treatment more significantly increased than CK in 0-20 cm soil layer,the average increase of three years were 127.7%,26.1% and 19.5%,respectively.The order of urease,phosphatase in 0-20 cm soil layer is：G≥M〉L≥CK,and G and M treatments had the most significant effects compared with CK,the increasing range of the two fertilization treatments were 32.5%-197.2% and 16.7%-34.8%,respectively,while there were no obviously changes in catalase activity with different organic fertilization treatments,the contents were mostly between 8.07 and 9.48U4.In conclusion,application of organic fertilizer in semi-arid areas plays an active role in improving some enzyme activities significantly.

关 键 词：宁南半干旱区 有机肥 土壤酶活性 

分 类 号：S154.2[农业科学—土壤学]