干旱区生态环境知识资源中心(Arid): 耕作措施对温带半干旱地区土壤温室气体(CO_2、CH_4、N

Arid

	耕作措施对温带半干旱地区土壤温室气体(CO_2、CH_4、N_2O)通量的影响
其他题名	Effect of tillage pattern on soil greenhouse gases (CO_2, CH_4 and N_2O) fluxes in semi-arid temperate regions
	汪婧; 蔡立群; 张仁陟; 王友玲; 董稳军
来源期刊	中国生态农业学报
ISSN	1671-3990
出版年	2011
卷号	19 期号:6 页码:1295-1300
中文摘要	通过设置在甘肃省定西市李家堡镇的不同耕作措施试验，利用CO_2分析仪、静态箱-气相色谱法对双序列轮作次序下春小麦地、豌豆地生育期内CO_2、CH_4和N_2O通量进行了测定。试验结果表明：4种耕作措施下春小麦地和豌豆地在生育期内均表现为CO_2源、N_2O源和CH_4汇的功能。传统耕作不覆盖、免耕不覆盖、免耕秸秆覆盖和传统耕作结合秸秆还田下，春小麦生育期内平均土壤CO_2通量(mumol?m~(-2)?s~(-1))分别为0.203 6、0.221 2、0.241 8、0.224 9,CH_4通量(mg?m~(-2)?h~(-1))分别为-0.041 6、-0.078 0、-0.081 8、-0.053 7,N_2O通量 (mg?m~(-2)?h~(-1))分别为0.089 1、0.069 2、0.046 1、0.065 6；豌豆生育期内平均土壤CO_2通量(mumol?m~(-2)?s~(-1))分别为0.273 6、0.261 6、0.218 1、0.236 0,CH_4通量(mg?m~(-2)?h~(-1))分别为-0.055 0、-0.073 7、-0.066 2、-0.054 5, N_2O通量(mg?m~(-2)?h~(-1))分别为0.123 4、0.084 7、0.080 6、0.035 0。少免耕及小麦秸秆覆盖有利于减少土壤CO_2排放通量，免耕不覆盖、免耕秸秆覆盖及传统耕作结合秸秆还田均能不同程度地增加CH_4吸收通量、减少N_2O排放通量。综合来看，免耕不覆盖、免耕秸秆覆盖和传统耕作结合秸秆还田3种保护性耕作措施有助于减少土壤温室气体的排放量。春小麦地CO_2通量随着土壤温度、土壤含水量的逐渐升高而增大；CH_4吸收通量随着土壤含水量的逐渐升高而增大，而随着土壤温度的逐渐升高而减小。豌豆地CO_2通量的变化与土壤含水量存在极显著正相关关系；而春小麦地N_2O通量则与平均土壤温度呈显著正相关，豌豆地则为极显著正相关。
英文摘要	Different tillage methods and crop rotations were experimented in Lijiabao Town of Dingxi City, Gansu Province and soil carbon dioxide (CO_2), methane (CH_4) and nitrous oxide (N_2O) fluxes measured using carbon dioxide analyzer and static chamber-gas chromatographic techniques. Analysis of the four tillage methods [tillage without straw or plastic film mulching (T), no-tillage without straw or plastic film mulching (NT), no-tillage with straw mulching (NTS) and tillage with straw mulching (TS)] showed that soils with spring wheat and pea were sources of atmospheric CO_2 and N_2O, sink of CH_4 during crop growth seasons. In spring wheat fields, the mean values of soil CO_2 flux (mumol?m~(-2)?s~(-1)) were 0.203 6, 0.221 2, 0.241 8 and 0.224 9 for T, NT, NTS and TS treatments, respectively. The mean values of soil CH_4 flux (mg?m~(-2)?h~(-1)) were -0.041 6, -0.078 0, -0.081 8 and -0.053 7 and those of soil N_2O flux (mg?m~(-2)?h~(-1)) were 0.089 1, 0.069 2, 0.046 1 and 0.065 6 for T, NT, NTS and TS treatments, respectively. In pea field, the mean values of soil CO_2 flux (mumol?m~(-2)?s~(-1)) were 0.273 6, 0.261 6, 0.218 1 and 0.236 0 for T, NT, NTS and TS treatments, respectively. The mean values of soil CH_4 flux (mg?m~(-2)?h~(-1)) were -0.055 0, -0.073 7, -0.066 2 and -0.054 5 and those for soil N_2O flux (mg?m~(-2)?h~(-1)) were 0.123 4, 0.084 7, 0.080 6 and 0.035 0, respectively. Compared with T, NT and TS, NTS retarded CO_2 and N_2O emission and enhanced CH_4 assimilation. Based on the study, NT, NTS and TS conservation tillage methods were efficient for retarding greenhouse gas emission. CO_2 fluxes increased with increasing soil moisture and temperature in spring wheat field, and CH_4 uptake fluxes increased with increasing soil moisture, but reduced with increasing soil temperature. A significant positive correlation was noted between CO_2 flux and soil moisture in pea field. Similarly, a significant positive correlation was observed between N_2O emission and soil temperature in pea and spring wheat fields.
中文关键词	温带半干旱地区 ; 春小麦 ; 豌豆 ; 轮作 ; 耕作措施 ; 温室气体 ; 排放通量 ; 吸收通量 ; 土壤含水量 ; 土壤温度
英文关键词	Semi-arid temperate region Spring wheat Pea Crop rotation Tillage method Greenhouse gas Emission flux Assimilation flux Soil moisture Soil temperature
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:4373452
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227600
作者单位	汪婧, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 蔡立群, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 张仁陟, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 王友玲, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.; 董稳军, 甘肃农业大学资源与环境学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	汪婧,蔡立群,张仁陟,等. 耕作措施对温带半干旱地区土壤温室气体(CO_2、CH_4、N_2O)通量的影响[J]. 甘肃农业大学,2011,19(6):1295-1300.
APA	汪婧,蔡立群,张仁陟,王友玲,&董稳军.(2011).耕作措施对温带半干旱地区土壤温室气体(CO_2、CH_4、N_2O)通量的影响.中国生态农业学报,19(6),1295-1300.
MLA	汪婧,et al."耕作措施对温带半干旱地区土壤温室气体(CO_2、CH_4、N_2O)通量的影响".中国生态农业学报 19.6(2011):1295-1300.