气候变化领域集成服务门户(CCPortal): Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry

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DOI	10.1016/j.heliyon.2024.e27136
	Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry
	Horf, Michael; Gebbers, Robin; Olfs, Hans -Werner; Vogel, Sebastian
发表日期	2024
EISSN	2405-8440
起始页码	10
结束页码	5
卷号	10 期号:5
英文摘要	Proper application of a fertilizer requires precise knowledge of its nutrient composition. In the case of liquid organic manures (LOM), this information is often lacking due to heterogeneous nature of these fertilizers. Published book values of nutrient contents present the average from a wide range of possible nutrient characteristics, but usually differ considerably from the concentration in a particular manure. Thus, chemical analyses are recommended before applying the specific LOM. Unfortunately, this is usually too costly and time -intensive in practical farming. Onfarm analysis by optical spectrometry in the visible and near -infrared (Vis-NIR) range is considered as an efficient alternative. However, calibration of Vis-NIR spectrometry for LOM is challenging as shown in many studies. One reason is LOMs' tendency to rapidly segregate into a fuzzy continuum with liquid and solid properties. By separating LOM into well-defined liquid and solid phases and measuring them separately, calibration of Vis-NIR spectrometry might be improved. In this study, the effects of four sample pre-treatment techniques on the prediction accuracy of macronutrients (N, P, K, Mg, Ca, S), micronutrients (B, Mn, Fe, Cu, Zn), dry matter and pH of LOM using visible and near infrared spectrometry were comprehensively investigated. The concentrations were referred either to wet basis or to dry matter basis. For the study, a total of 163 samples, separated in two similar LOM sets (pig, cattle, digestates), were either dried, filtered, or centrifuged and always compared to non -treated samples. The experiments demonstrate that in comparison to raw samples (0 r2 = 0.85) neither filtering (0 r2 = 0.76 for filtrates and 0 r2 = 0.71 for filter residues), centrifugation (0 r2 = 0.59 for supernatants and 0 r2 = 0.79 for pellets), nor drying (0 r2 = 0.74) revealed to be a helpful preparation step significantly improving prediction results, independent from referring to wet or dry basis concentrations.
英文关键词	Biogas digestates; Centrifuging; Drying; Filtration; Optical spectroscopy; Livestock manure; Climate change
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001204400800001
来源期刊	HELIYON
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302551
作者单位	Leibniz Institut fur Agrartechnik und Biookonomie (ATB); Martin Luther University Halle Wittenberg
推荐引用方式 GB/T 7714	Horf, Michael,Gebbers, Robin,Olfs, Hans -Werner,et al. Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry[J],2024,10(5).
APA	Horf, Michael,Gebbers, Robin,Olfs, Hans -Werner,&Vogel, Sebastian.(2024).Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry.HELIYON,10(5).
MLA	Horf, Michael,et al."Effects of sample pre-treatments on the analysis of liquid organic manures by visible and near-infrared spectrometry".HELIYON 10.5(2024).