ISWC OpenIR  > 水保所知识产出(1956---)
秸秆腐解过程中结构的变化特征
曹莹菲; 张 红; 赵 聪; 刘 克; 吕家珑
2016
Source Publication农 业 环 境 科 学 学 报
Volume35Issue:5Pages:976-984
Abstract

应用尼龙网袋法和傅里叶变换红外光谱分析,研究玉米和大豆秸秆在 3 种不同试验地(葡萄园、桃园、农田)腐解过程中的
结构变化特征,为秸秆还田措施提供理论依据。结果表明,玉米和大豆秸秆的官能团组成具有相似之处,但在 3400、1640、1400~
1460、1310、1000~1100 cm -1 处的吸收峰强度不同,稳定成分存在差异。腐解前后作物秸秆红外光谱吸收峰强度有所改变,随着腐解
时间的增加,羟基、酰胺基、甲基、亚甲基和次甲基的含量逐渐降低,羧基增多,有机酸形成,碳水化合物、酰胺类化合物、糖类等逐渐
分解。易分解的化合物(如脂肪族结构、酰胺类化合物和糖类)可直接进行分解,部分芳香类等难分解化合物则先分解为羧酸酯类
(1725~1735 cm -1 )、脂肪族类(1450~1460 cm -1 )等中间产物后再进行分解。1560~1732 cm -1 处的肩峰与作物残体中有机酸有关。尿素
对玉米秸秆的腐解具有促进作用,且与 1310 cm -1 处的吸收峰变化有关。作物秸秆还田之后,会向腐植酸方向腐解,其结构变化在不
同土地利用类型和干湿处理之间无明显区别(P>0.05),与还田作物秸秆种类以及 N 含量有关。

Other Abstract

In this study, field experiments were conducted in vineyard, peach orchard, and farmland to examine structural characteristics of
organic substances in crop residues(corn stover and soybean stem)during decomposition, using nylon mesh bag method and fourier trans-
form infrared(FTIR)spectroscopy. Results showed that corn and soybean residues had similar functional groups. However, FTIR absorption
peaks and intensities were different at 3400, 1640, 1400~1460, 1310 and 1000~1100 cm -1 because of differences in content of amide com-
pounds and silicon stable matters. The FTIR absorption peaks and intensities in crop residues changed after decomposition. With decompo-
sition, hydroxyl, amide group, methyl, and methylene content in the residues reduced, but carboxyl increased, along with the formation of or-
ganic acids and the decomposition of carbohydrates, amide compounds and sugars. Those easily decomposable compounds such as aliphatic
structure, amide compounds and sugars were directly decomposed, while aromatic substances with difficult decomposition first broke down to
intermediates such as carboxylic acid esters (1725~1735 cm -1 )and aliphatic structure(1450~1460 cm -1 ). The shoulder peak at 1560~1732
cm -1 was associated with organic acids in crop residues. Urea had a promoting effect on decomposition of corn residues, and influenced the
absorption peak at 1310 cm -1 . The residues mainly formed humic acid after decomposition. There were no obvious differences in organic
structures among different land uses and between fresh and dry treatments(P>0.05). However, crop residue type and residue N content im-
pacted structural changes.

Keyword秸秆腐解 红外光谱 结构
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8636
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院,陕西 杨凌 712100
2.黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100
Recommended Citation
GB/T 7714
曹莹菲,张 红,赵 聪,等. 秸秆腐解过程中结构的变化特征[J]. 农 业 环 境 科 学 学 报,2016,35(5):976-984.
APA 曹莹菲,张 红,赵 聪,刘 克,&吕家珑.(2016).秸秆腐解过程中结构的变化特征.农 业 环 境 科 学 学 报,35(5),976-984.
MLA 曹莹菲,et al."秸秆腐解过程中结构的变化特征".农 业 环 境 科 学 学 报 35.5(2016):976-984.
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