不同原料堆制有机肥腐殖酸的化学组成与结构特征

发布时间：2018-01-31 19:40

  本文关键词： 有机肥 腐殖酸 化学元素 红外 C核磁共振 结构特征 电镜扫描　出处：《中国烟草科学》2016年03期 　论文类型：期刊论文

【摘要】：采用元素分析、傅立叶变换红外光谱(FT-IR)、固体~(13)C核磁共振(NMR)以及电镜扫描技术,对3种不同物料堆积的有机肥(T1,玉米杆:牛粪:菜籽饼=60:50:30;T2,玉米杆:废次烟草:牛粪:菜籽饼=35:25:40:30;T3,烟秆:废次烟叶:猪粪:菜籽饼=30:30:40:30)中腐殖酸的化学组成与结构特征进行了初步研究。结果显示:(1)不同有机肥中腐殖酸的C、H、N、O的含量均表现为T3T2T1;(2)FT-IR分析显示,T3样品中腐殖酸的双键H和苯环H较T1、T2样品多;T2样品在1050 cm~(-1)处的吸收强度相对较强;1710 cm~(-1)处的吸收峰T3样品最明显,含有羧基和羰基官能团最多,T1样品中最少。(3)固体~(13)C-NMR分析结果显示,脂肪碳(δ0~50)含量T3样品最高,含氧脂肪碳(δ50~110)含量T1样品最高,芳香碳(δ110~160)含量T2样品最高,δ160~230的羧基碳和羰基碳含量表现为T2=T3T1;(4)电镜扫描结果显示,3种腐殖酸颗粒的表面具有维管状结构和孔隙,维管结构数量表现为T3T2T1,孔隙数量则表现为T1T2T3。以上结果表明,3种腐殖酸的化学组成与结构特征有着明显差异。
[Abstract]:By means of elemental analysis, Fourier transform infrared spectroscopy (FTIR), solid-state 13C NMR and scanning electron microscopy (SEM), the organic fertilizer T1 with three different materials was deposited. Corn rod: cow dung: rapeseed cake 60: 50: 30; T2, corn rod: waste tobacco: cow dung: rapeseed cake 35: 25: 40: 30; T3. The chemical composition and structural characteristics of humic acid in tobacco stalk: waste tobacco leaf: pig manure: rapeseed cake 30: 30: 40: 30) were studied. The content of HN O was T _ 3T _ 2T _ 1; FT-IR analysis showed that there were more humic acid double bond H and benzene ring H in T 3 sample than in T 1 T 2 sample. The absorption intensity of T2 sample was relatively strong at 1050 cm ~ (-1). The absorption peak of T3 at 1710 cm ~ (-1) was the most obvious, and the sample containing carboxyl and carbonyl functional groups was the least. 3) the results of 13C-NMR analysis showed that the absorption peak at 1710 cm ~ (-1) had the most carboxyl and carbonyl functional groups in T _ (1). The content of fatty carbon (未 _ (0) C _ (50)) in T3 sample was the highest, the content of oxygenated fat carbon (未 _ (50) C _ (110)) in T1 sample was the highest, and the content of aromatic carbon (未 _ (110) C _ (160)) in T _ 2 sample was the highest. The content of carboxyl carbon and carbonyl carbon of 未 160T230 is T2T3T1; The scanning electron microscope showed that the surface of the three kinds of humic acid particles had vascular structure and pores, and the number of vascular structures was T 3T 2T1. The number of pores is T _ 1T _ 2T _ 3. The above results show that the chemical composition and structural characteristics of the three humic acids are obviously different.
【作者单位】： 中国科学技术大学;贵州省烟草公司黔西南州公司;
【基金】：中国烟草总公司贵州省公司重点科技项目(201411)
【分类号】：S141
【正文快照】： 腐殖酸是有机肥的重要组成成分,其活性基团具有亲水性和吸附性,可与金属离子生成螯合物,对土壤结构和肥力形成具有重要作用。同时腐殖酸有良好的生理活性,对作物营养和代谢具有极为重要的作用[1]。腐殖酸大量存在于褐煤、泥炭等天然物质中,同时也存在于堆制而成的有机肥料中。，

本文编号：1479844