期刊论文

中文

土壤通报

0564-3945

2004

35

3

299-302

10.3321/j.issn:0564-3945.2004.03.014

湖南农业大学优秀青年基金资助项目

本校为第一机构

在湖南3种土壤中施人尿素后,对土壤短期内pH变化和氨气挥发进行了研究,结果表明:在常温25℃下,3种土壤尿素水解速度次序为:冲积菜园土＞红菜园土＞茶园土;pH变化是先上升达到峰值,然后下降;氨气挥发趋势也是慢慢变大出现峰值,然后降低,在3种土壤中氨气挥发强度次序为:冲积菜园土＞红菜园土＞茶园土.冲积菜园土中,随着温度的升高尿素水解速度加快;pH升高幅度速度变大,峰值提前;氨气挥发强度变大,也是峰值提前.引起各处理差异的原因与土壤本身pH、CEC、有机质、尿酶活性以及外界条件-温度相关.

Short-term changes of pH and volatilization of ammonia in 3 soil types from urea were studied. The result indicated that: At 25℃ the speed order of urea hydrolysis in 3 soil types was alluvial vegetable garden soil>redvegetable soil>tea garden soil; the changes of pH rose first,and then fell;volatilization of ammonia; followed the changes of soil pH.ammonia volatilization intensity order in 3 soil types was alluvial vegetable garden soil>red vegetable garden soil>tea garden soil.In alluvial vegetable garden soil,with the increasing of temperat...