The Effects of Nitrogen Fertilizers and Cultural Patterns on Methane Emission From Rice Paddy Fields
The Effects of Nitrogen Fertilizers and Cultural Patterns on Methane Emission From Rice Paddy Fields
复制标题
氮肥和栽培模式对稻田甲烷排放的影响
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Kyeng
中科院分区：
文献类型：
--
作者：
J. Ko;Hang;U. Kang;Hang;D. Lim;Kyeng
为减少稻田甲烷排放，研究了不同氮肥来源和栽培模式对粉质壤土甲烷排放的影响。通过盆栽试验研究了施氮肥对淹水土壤pH、Eh、土壤水分硫酸盐浓度的影响。在移栽栽培中，甲烷的总排放量主要为尿素；对于硫酸铵；用于包覆尿素。干土直播时甲烷排放主要为尿素排放；硫酸铵和包覆尿素。因此，在干燥土壤上直接播种的甲烷排放量比移栽低29.7%。按氮肥计算，硫酸铵和包膜尿素的甲烷排放量分别比尿素降低18.4%和15.9%。盆栽试验中，施氮肥的淹水土壤pH值依次下降的顺序为尿素、包膜肥、硫酸铵、包膜肥，且与淹水土壤总排放的顺序一致。土壤Eh以硫酸铵施用最高，其次为包膜尿素、不施肥、尿素。土壤水分中硫酸盐的浓度顺序为硫酸铵b>包覆尿素>尿素>不施肥。
To mitigate the methane emission from rice paddy fields, effects of nitrogen fertilizers source and cultural patterns were evaluated on silty loam soils. And a pot experiment was carried out to find out the effects of nitrogen fertilizers on soil pH, Eh, sulfate concentration of soil water in flooded soil. In transplanting cultivation, the total methane emission depending on fertilizers was for urea ; for ammonium sulfate ; for coated urea. Methane emitted in direct seeding on dry soil was for urea ; for ammonium sulfate : and for coated urea. Thus, the methane emission rate of direct seeding on dry soil was 29.7% lower than transplanting. According to the nitrogen fertilizers, the methane emission rate by ammonium sulfate and coated urea were reduced 18.4 and 15.9% in comparison with urea, respectively. In pot experiments, pH in flooded soils depending on nitrogen fertilizers dereased in order of urea > coated fertilizer > ammonium sulfate and the order was coincided with that of total emission from flooded soil. Soil Eh was highest in ammonium sulfate application followed by coated urea, no fertilizer, urea. And sulfate concentrations of soil water were in order of ammonium sulfate > coated urea > urea > no fertilizer.