[Characteristics of caloric value and nutrient content of four garden tree species].
In this study, the caloric value, nutrient content, and ash content in the stem, leaf, and root of four garden tree species Prunus mume Meiren, P. serrulata, Magnolia denudata and M. grandiflora were determined to explore the distribution characteristics of caloric value in different tree organs at different development stages, and related affecting factors. The results showed that the gross caloric value (GCV) and ash free caloric value (AFCV) in different organs of the tree species ranged from 17.02 to 21.93 kJ g(-1) and from 18.42 to 22.57 kJ g(-1), respectively. Leaf and fine root had relatively higher GCV and AFCV than stem, and AFCV had a decreasing trend with the development of stem and root. P. mume Meiren and P. serrulata had higher GCV and AFCV than M. grandiflora and M. denudate. Both GCV and AFCV of fine root were significantly correlated with its nutrient and ash contents (P <0.01). With the development of root, the correlations of GCV and AFCV with organic carbon content declined gradually, while the GCV of different organs had the strongest correlation with total nitrogen content.
Chen
Mei-ling
ML
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi, China. meiling413@sohu.com
Shangguan
Zhou-ping
ZP
D017753:Ecosystem; D004734:Energy Metabolism; D031566:Magnolia / Q000737:chemistry / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D028223:Pinus / Q000737:chemistry / Q000378:metabolism*; D013045:Species Specificity; D014197:Trees / Q000737:chemistry / Q000378:metabolism
D009584:Nitrogen