1) pattern of N 2O emission
N2O排放分布格局
2) N2O emission
N2O排放
1.
Two uplands of different reclamation years(since 1987 and 1993,respectively) were selected in our study to research the effect of cultivation years, precipitation,soil moisture and plant on N2O emission.
以三江平原沼泽湿地不同开垦年限(1987年、1993年开垦)的旱田(种植方式为大豆-冬闲)为研究对象,探讨了种植年限、降雨、土壤湿度以及植物参与对旱田N2O排放的影响。
2.
N2O emission was measured in rape growing season of a rice-rape rotation system in the Chengdu plain from November 2004 to May 2005.
利用静态箱—气相色谱法测定了成都平原2004年11月至2005年5月水稻—油菜轮作系统油菜季N2O排放通量。
3.
The results showed,1) Nitrogen fertilizer application enhanced the N2O emission significantly.
通过不同施氮水平与不同氮肥品种2个田间试验,结合静态箱-气相色谱法研究了川中丘陵区2005年5~9月石灰性紫色土-玉米根系系统的N2O排放变化。
3) n2o emission
N2O排放量
1.
The intact soil core-acetylene inhibition technique was used to study the effects of N-fertilizer application rates and types on the denitrification losses and N2O emissions in a calcareous purple soil-maize crop system in the upland area of central Sichuan Basin.
利用原状土柱-乙炔抑制法对不同施氮量和不同氮肥品种下紫色土种植玉米期间的N2O排放量和反硝化损失量进行测定。
4) Nitrous oxide emission
N2O排放
1.
Study on its economic significance and nitrous oxide emission of this practice can provide theoretical and practical basis for further development and utilization of this classical agricultural technique.
稻鸭共作技术是中国传统农业的精华,研究稻鸭共作生态系统中N2O排放产生的环境效应并对其经济价值进行评价,为进一步开发利用这一经典农艺提供理论基础和实践依据。
2.
The new research progress of nitrous oxide emission from agricultural soil was summarized and analyzed,including the key influencing factors(soil moisture,pH value,soil temperature,soil texture and fertilization),mitigation measures and models.
对农田土壤N2O排放的主要影响因素(包括土壤含水量、土壤pH值、土壤温度、土壤质地和肥料施用等)、已有农田土壤N2O排放减排措施及估算模型的研究进展进行了总结分析,并指出了今后研究的重点和方向:(a)探究农田土壤N2O排放的内在机制;(b)提高预测模型的精度;(c)提出科学合理的减排措施。
5) N 2O emission
N2O排放
6) N_2O emission
N2O排放
1.
To investigate the effect of different urea incorporation amount in different soils on N_2O emission,a pot experiment was carried in 2002-2003.
鉴于N2O排放量占施用氮肥量的比例即N2O排放系数还有很大不确定性,室外盆栽试验于2002~2003年选取3个供试土壤,各土壤设置对照和低、中、高氮肥水平,全年施尿素量(以N计)分别为334、670和1 004 kg/hm2。
2.
Denitrification loss(N_2 + N_2O) was measured by the acetylene inhibition-intact soil core technique,and N_2O emission was also measured in the absence of acetylene.
采用田间试验研究了番茄地施用化学氮肥后的氨挥发、反硝化损失和N2O排放及其影响因素。
3.
The results showed that annual averaged N_2O emissions(in nitrogen gauge) in 1990-1994,1995-1999,2000-2004,respectively,were 52.
川渝地区农业生态系统N2O排放量以及农田N2O排放通量,1995~1999年期间比1990~1994年期间增长幅度较大;2000~2004年期间,农田N2O排放通量增长速度未呈现减缓趋势,但由于耕地面积减少,农田N2O排放量增长呈现停滞状态。
补充资料：格局
结构和格式：经济迅速发展，不断打破旧～，形成新～ㄧ这篇文章写得很乱，简直不成个～。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条