%0 Journal Article
%T Effects of long-term fertilization on enzyme activities in black soil of Northeast China.<br>长期施肥对东北黑土酶活性的影响
%A WANG Shu-qi
%A HAN Xiao-zeng
%A QIAO Yun-fa
%A WANG Shou-yu
%A <br>王树起
%J 应用生态学报
%D 2008
%I 
%X In this paper, black soil samples at the depths of 0-20 cm and 20-40 cm were collected from the Hailun Agricultural Ecology Station of Chinese Academy of Sciences to study the effects of long-term fertilization on their urease, invertase, phosphatase and catalase activities and total C and N contents. The results showed that long-term application of chemical fertilizers and organic manure increased the activities of urease, invertase and phosphatase in 0-20 cm and 20-40 cm soil layers in different degree, and the combined application of them increased the activities of the three enzymes significantly, with an increment of 43.6%-113.2%, 25.9%-79.5% and 14.7%-134.4% in 0-20 cm soil layer and 56.1%-127.2%, 14.5%-113.8% and 16.2%-207.2% in 20-40 cm soil layer, respectively. However, long-term application of chemical fertilizers without organic manure had little effects on catalase activity. The activities of urease, invertase and phosphatase decreased with increasing soil depth. Long-term application of N fertilizer increased urease activity, and P fertilization had obvious positive effect on phosphatase activity. Long-term fertilization also had obvious effects on the soil total C and N contents and C/N ratio.
%K 黑土
%K 长期施肥
%K 化肥
%K 有机肥
%K 土壤酶
%K 土壤深度
%K 施肥
%K 东北
%K 黑土酶活性
%K 酶活性影响
%K Northeast
%K China
%K black
%K soil
%K activities
%K enzyme
%K fertilization
%K 含量
%K 土壤全
%K 作用
%K 磷肥
%K 施用氮肥
%K 土层深度
%K 过氧化氢酶
%K 土壤酶的活性
%K 配合施用
%K 施用化肥
%K 土壤脲酶
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=DE86CF7A5DBB1FA6CE711D4D4328A275&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=CEFF71AEB051114C&eid=CF0706A3E35031F6&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=26