Spatial Variations in Concentration, Compositions of Glomalin Related Soil Protein in Poplar Plantations in Northeastern China, and Possible Relations with Soil Physicochemical Properties

Table 5

Differences of compositional parameters of purified T-GRSP of different sites in Songnen Plain. The data were derived from X-ray diffraction, ultraviolet spectrum, and 3D fluorescent spectrum.

Site	X-ray diffraction		Wavelength at 295 nm		Compounds derived from 3D fluorescence spectrum
	Grain size; (nm)	Relative crystallinity; (%)	OD value from ultraviolet spectrum	Fluorescence intensity at the maximum emission wavelength	Tyrosine-like protein	Tryptophan-like protein	Fulvic acid-like	Soluble microbial byproduct-like	Humic acid-like	Nitrobenzoxadiazole-like	Calcofluor white-like
Lanling	125	1.35	1.14	28.28	6.41	6.39	13.14	—	33.78	51.88	52.51
Zhaodong	98	0.7	1.02	20.53	1.74	2.85	9.32	—	31.77	52.37	50.07
Dumeng	174	0.73	1.05	29.52	5.11	5.82	11.84	3.16	42.18	—	59.17
Zhaozhou	130	0.69	1.21	25.74	7.78	5.84	11.62	6.45	34.33	57.91	—
Fuyu	138	1.05	1.27	30.49	6.46	8.76	15.93	—	35.95	51.43	52.88
Mingshui	111	1.98	1.37	22.57	4.23	5.63	10.4	—	25.7	41.3	—
Largest/lowest ratio	1.41	2.71	1.34	1.49	4.5	3.07	1.71	2.04	1.64	1.4	1.18
Mean of pooled data	129 (2.6)	1.08 (0.5)	1.18 (0.13)	26.20 (3.98)	5.29 (2.1)	5.88 (1.9)	12 (2.31)	1.6 (2.69)	33.95 (5.4)	42.48 (21.5)	35.77 (27.9)