A Mid-Infrared Spectral Inversion Model for Total Nitrogen Content of Farmland Soil in Southern Xinjiang

Zi-jin BAI; Jie PENG; De-fang LUO; Hai-hui CAI; Wen-jun JI; Zhou SHI; Wei-yang LIU; Cai-yun YIN

doi:10.3964/j.issn.1000-0593(2022)09-2768-06

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 9 >Page 2768 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 9, 2768 (2022)

A Mid-Infrared Spectral Inversion Model for Total Nitrogen Content of Farmland Soil in Southern Xinjiang

Zi-jin BAI^1、*, Jie PENG^{1、1; *;}, De-fang LUO^1、1;, Hai-hui CAI^1、1;, Wen-jun JI^2、2;, Zhou SHI^3、3;, Wei-yang LIU^1、1;, and Cai-yun YIN^1、1;

Author Affiliations

¹1. College of Agriculture, Tarim University, Alar 843300, China

²2. College of Land Science and Technology, China Agricultural University, Beijing 100083, China

³3. College of Environment and Resources, Zhejiang University, Hangzhou 310058, China

show less

DOI: 10.3964/j.issn.1000-0593(2022)09-2768-06 Cite this Article

Zi-jin BAI, Jie PENG, De-fang LUO, Hai-hui CAI, Wen-jun JI, Zhou SHI, Wei-yang LIU, Cai-yun YIN. A Mid-Infrared Spectral Inversion Model for Total Nitrogen Content of Farmland Soil in Southern Xinjiang[J]. Spectroscopy and Spectral Analysis, 2022, 42(9): 2768 Copy Citation Text

show less

Fig. 1. Mid-infrared spectral reflectance characteristics of soil samples with different total nitrogen contents

Download full size | View in the Article

Fig. 2. Correlation analysis of soil total nitrogen content and mid-infrared spectral data

Download full size | View in the Article

样本集	数目	最小值/(g·kg^-1)	最大值/(g·kg^-1)	平均值/(g·kg^-1)	标准差/(g·kg^-1)	变异系数/%
建模集	164	0.07	1.66	0.68	0.28	41
预测集	82	0.17	1.50	0.68	0.27	40
总体	246	0.07	1.66	0.68	0.28	41

Table 1. Statistical results of total nitrogen content in soil samples

View in the Article

建模因子	模型	建模集				预测集
建模因子	模型	R²	RMSE	RPD	RPIQ	R²	RMSE	RPD	RPIQ
全波段	PLSR	0.79	0.13	2.17	3.22	0.77	0.13	2.08	3.30
	SVM	0.82	0.12	2.26	3.36	0.73	0.15	1.86	2.88
	RF	0.77	0.14	2.12	2.92	0.75	0.13	2.09	3.24
	BPNN	0.81	0.12	2.31	3.43	0.75	0.12	2.12	3.28
PCA	PLSR	0.76	0.14	2.06	3.06	0.72	0.15	1.84	2.85
	SVM	0.81	0.12	2.24	3.33	0.75	0.14	1.95	3.01
	RF	0.75	0.12	2.14	3.37	0.74	0.15	2.05	3.03
	BPNN	0.84	0.11	2.49	3.70	0.78	0.12	2.33	3.54
SPA	PLSR	0.75	0.14	2.00	2.98	0.57	0.18	1.50	2.31
	SVM	0.69	0.16	1.69	2.52	0.51	0.20	1.39	2.15
	RF	0.74	0.14	2.02	2.96	0.71	0.16	1.77	2.68
	BPNN	0.89	0.10	2.75	4.10	0.76	0.13	2.18	3.41

Table 2. Accuracy comparison of different models for soil total nitrogen content

Download Citation

Save the article for my favorites

Paper Information