不同施肥处理下灌耕灰钙土水解酶活性的剖面分布及其相关性  

Profile Distributions and Relationships of Soil Hydrolytic Enzymes' Activities in the Irrigated Farming Sierozem under Different F ertilizations

作　　者：刘淑英[1] 王平[1] 王娟[2] 

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]甘肃省定西市旱作农业科研推广中心,甘肃定西743000

出　　处：《土壤通报》2010年第6期1386-1391,共6页Chinese Journal of Soil Science

摘　　要：在不同施肥处理下,对西北半干旱区灌耕灰钙土,土壤转化酶、脲酶和碱性磷酸酶活性的剖面分布以及土壤酶与土壤全量养分、土壤酶之间相关性进行研究。结果表明,各处理在小麦的各个生育期土壤转化酶、脲酶和碱性磷酸酶的活性均为:0～10 cm土层>10～20 cm土层>20～40 cm土层,且绝大多数处理各土层之间酶活性差异都达到显著水平。土壤转化酶、脲酶和碱性磷酸酶与土壤有机质、全氮、全磷含量基本呈正相关,有的达到显著和极显著水平,三种酶与全钾含量均为负相关,基本未达显著。土壤转化酶、脲酶和碱性磷酸酶活性三者之间的相关性呈极显著和显著正相关,酶的总体活性大小可以用来衡量土壤肥力水平的高低。This study examined the profile distribution and relationships of soil total nutrients＇ contents and the activities of intervase,urease and alkali-phosphatase in irrigated cultivation Sierozem under different fertilizer amendments in Semiarid Area of Northwest China.The results showed that the order of the activities of intervase,urease and alkali-phosphatase in different soil depths was 0-10 cm 10-20 cm 20-40 cm during the growing phase of wheat,and it was significantly different as for the soil enzymes＇ activities between different soil depths in most of the fertilizer treatments.The activities of soil intervase,urease and alkali-phosphatase were positively correlated with the contents of soil organic matter,total nitrogen and total phosphorus.There were significantly positive correlation among the activities of intervase,urease and alkali-phosphatase in soil.Generally,the activities of soil enzyme could be used to evaluate to the level of soil fertility.

关 键 词：施肥 小麦生育期 灌耕灰钙土 酶活性 剖面 相关性 

分 类 号：S154.2[农业科学—土壤学]