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廖宗文, LIU KEXING, LIAO ZHONGWEN and YOU ZHILIN
Pedosphere 7(4):379~382, 1997,-0001,():
-1年11月30日
fertilizer effect,, methane emission,, organic-inorganic fertilizer,, rice
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【期刊论文】固-液反应包膜尿素膜的微结构与红外光谱特征及氮素释放特性研究
廖宗文, 毛小云, 冯 新, 王德汉, 孙克君
中国农业科学 2004,37(5):704-710,-0001,():
-1年11月30日
应用扫描电镜和红外光谱仪对2种固-液反应型包膜尿素的膜结构及成膜机理进行分析,并结合水中氮素溶出特性探讨了膜的结构特征与控释性能的关系。结果表明,固-液反应型包膜尿素膜由固体颗粒间的紧密排列并通过液体胶联的多层叠加构成,叠加层间和单层固体颗粒间排列的紧密程度决定膜的孔隙度和孔径大小,且与包膜材料特性有关。对膜谱学特征研究表明,固、液2种包膜材料在复合成膜过程中固体粉末表面的O-H与液体包膜材料的双键位置有合作用,这种键合作用是膜形成和保证膜强度的基础。2种包膜尿素氮素释放速度有较大差别,且与膜结构密切相关,膜的孔隙度和孔径大小是决定氮素溶出速率的关键因素。
包膜尿素, 膜, 扫描电镜, 红外光谱, 氮素释放特性
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廖宗文, LIU Ke-Xing, LIAO Zong-Wen*, WANG Sheng-Chun and YOU Zhi-Lin
Pedosphere 13(4):337-344, 2003,-0001,():
-1年11月30日
Three types of paddy soils, derived from granite, Quaternary red clay and basalt, respectively, were selected to study the effects of Fe and Mn in paddy soils on methane production and emission through pot and incubation experiments. The results indicated that the difference of Fe and Mn in paddy soils was one of the important factors causing obvious differences in methane emission from different soil types. Soil Fe and Mn affecting methane emission from the paddy soils was likely through affecting soil Eh and forming Fe and Mn plaques on rice roots. Different rates and valences of added Fe and Mn significantly affected methane production from paddy soils. Therefore, this study enhanced understanding of processes controlling methane emission from paddy soils and may help to improve modeling and estimating regional and global methane emission from paddy soils.
Fe,, methane emission,, methane production,, Mn,, paddy soil
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