玉米植株对大田温室气体N_2O排放的影响  

Effect of maize plant on N 2O emission from field.

作　　者：黄国宏[1] 陈冠雄[1] 黄斌[1] 吴杰[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》1998年第3期261-264,共4页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金;中国科学院陆地生态系统痕量物质生态过程开放实验室基金

摘　　要：利用封闭式箱法对玉米田Ｎ２Ｏ排放通量的观测表明，大田种植玉米后，对Ｎ２Ｏ排放产生了很大影响，玉米土壤系统的Ｎ２Ｏ排放通量大于不种玉米的土壤．此外，植物根系能明显促进土壤中Ｎ２Ｏ的排放，特别是在玉米生长后期尤为明显．从播种开始到年底，施尿素导致Ｎ２Ｏ排放为３．３ｋｇ·ｈｍ－２，玉米植株为０．６９ｋｇ·ｈｍ－２，占总排放量的１７．３％．Observation on N 2O flux in maize field using closed chamber technique shows that maize plant had a significant influence on N 2O emission from maize soil system. The N 2O emission from maize soil was greater than that from soil without maize. In addition, the roots of maize plant could obviously promote N 2O emission from soil, especially in its later growing period. N 2O emission after applying urea was 3.3kg·hm -2 from sowing to the end of the year, and 0.69kg·hm -2 of it came from maize plant, which accunted for 17.3% of total N 2O emission.

关 键 词：玉米植株 N2O 排放通量 

分 类 号：S181[农业科学—农业基础科学] S513.08