| 胡柏杨,蒋林树,李艳霞,陈兴财,安思羽.冻融循环对猪粪粒径及有机质变化的影响[J].农业环境科学学报,2021,40(1):219-226. |
| 冻融循环对猪粪粒径及有机质变化的影响 |
| Effects of freeze-thaw cycles on particle size, structure and organic matter composition of pig manure |
| 投稿时间：2020-07-27 |
| DOI：10.11654/jaes.2020-0874 |
| 中文关键词: 冻融循环 猪粪 有机质 粒径 影响 |
| 英文关键词: freeze-thaw cycles pig manure organic matter particle size effect |
| 基金项目:国家自然科学基金项目（21577007，21976017）；北京农学院奶牛营养学北京市重点实验室开放项目 |
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| 中文摘要: |
| 为探究冻融过程对畜禽粪便的粒径分布及其有机质组成的影响，通过湿筛法分析了经历冻融循环前后猪粪粒径分布的变化，并采用傅里叶变换红外光谱和13C核磁共振光谱对冻融循环处理前后猪粪中提取的有机质组分（溶解性有机质、腐植酸、木质素和蛋白质）的结构进行了表征。结果表明：冻融循环使猪粪的大颗粒发生破碎，并且随着冻融循环次数的增加，破碎的效果也更加明显，经过30次冻融循环处理的猪粪与未经冻融的样品相比，>1 000 μm的颗粒含量降低了6.73%，38~75 μm和<38 μm的颗粒含量则分别增加了5.94%和6.13%；冻融循环使猪粪的总有机质含量降低，溶解性有机质含量升高，不饱和有机质增加，并产生了更多的氨基酸以及—COO—和C=O基团。其中，溶解性有机质的芳香度降低，腐植酸和木质素的芳香度基本不变，而蛋白质的芳香度增加。研究表明，冻融循环可能会增加畜禽粪便在自然环境中的溶解度和流动性。 |
| 英文摘要: |
| To explore the effects of freeze-thaw cycles on particle size distribution and organic matter composition of livestock manure, changes in the particle size distribution of pig manure before and after freeze-thaw cycle treatments were studied using the wet screening method; organic matter components(dissolved organic matter, humic acid, lignin, and protein)were extracted from pig manure before and after freeze-thaw cycle treatments and their structure was characterized using Fourier transform infrared spectroscopy and 13C nuclear magnetic resonance spectroscopy.The results showed that freeze-thaw cycles resulted in the breaking of large particles of pig manure, and the breaking effect became significant with an increase in freeze-thaw cycle times. Compared with samples without freeze-thaw cycle treatment, particlesize>1 000 μm in pig manure treated with 30 freeze-thaw cycles decreased by 6.73%, and particlesize of 38~75 μm and <38 μm increased by 5.94% and 6.13%, respectively. Freeze-thaw cycles reduced the total organic matter content and increased the dissolved and unsaturated organic matter content of pig manure. Moreover, pig manure produced more amino acids and -COO- and C=O functional groups after freeze-thaw cycle treatment. Aromatic degree of dissolved organic matter decreased, remained unchanged for humic acid and lignin,and increased for protein. Studies have shown that freeze-thaw cycles may increase the solubility and mobility of livestock manure in natural environment. |
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