| 旱地土壤N2O排放与土壤脲酶活性关系的研究 |
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| 引用本文： | 白红英,李春越,张一平. 旱地土壤N2O排放与土壤脲酶活性关系的研究[J]. 西北农林科技大学学报(自然科学版), 2003, 31(1): 29-33 |
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| 作者姓名： | 白红英 李春越 张一平 |
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| 作者单位： | 西北农林科技大学,资源环境学院,陕西,杨陵,712100 |
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| 基金项目： | 国家自然科学基金项目 (3 9970 45 9)，黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目 (10 5 0 1-85 )，西北农林科技大学专项基金项目 |
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| 摘 要： | 以年降雨量 6 32 m m的黄土高原南部旱地小麦田及休耕地为研究对象 ,研究了耕作措施及氮肥施用对小麦生长期土壤 N2 O排放及土壤脲酶活性的影响。结果表明 ,种植小麦对农田 N2 O排放及 10～ 2 0 cm和 0～2 0 cm土层中的脲酶有激发效应 ;地膜覆盖能使土壤 N2 O排放量和耕层不同层次中的脲酶活性升高 ;N2 O排放与耕层土壤脲酶活性之间具有极显著线性相关关系 (y=4 .5 6 0 x+6 .6 86 ,r=0 .6 94 * *) ,因此耕作层土壤脲酶活性可以作为旱作农田土壤 N2 O排放量的生物指标之一。
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| 关 键 词： | 土壤N2O排放量 土壤脲酶活性 耕作措施 |
| 文章编号： | 1671-9387(2003)01-0029-05 |
| 收稿时间： | 2002-11-18 |
| 修稿时间： | 2002-11-18 |
Study on N2O emission and urease activity in dryland soil |
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| BAI Hong ying,LI Chun yue,ZHANG Yi ping. Study on N2O emission and urease activity in dryland soil[J]. Journal of Northwest A&F University（Natural Science Edition）, 2003, 31(1): 29-33 |
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| Authors: | BAI Hong ying LI Chun yue ZHANG Yi ping |
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| Affiliation: | (College of Resources and Environment,Northwest Sci Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,China) |
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| Abstract: | Experiments were carried out to study the influence of different cultivation methods and plastic film mulching on the N 2O emission and urease activity in field soil.The results showed that wheat cultivation would activate N 2O emission and urease activity in the soil layer with a depth of 10-20 cm and 0-20 cm.The plastic film mulching would increase the N 2O emission and urease activity in different soil layers.The N 2O emission is positively related to the urease activity in tillable soil layers ( y=4.560x+ 6.686 ,r=0.694 ** ),that is the urease activity can be used as the bio indicator for N 2O emission to reflect the comprehensive influence of other factors. |
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| Keywords: | N 2O emission urease activity cultivation methods |
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