Foliar Litter Decomposition: A Conceptual Model with Focus on Pine (Pinus) Litter—A Genus with Global Distribution

Table 5

Mean intensity distributions (% of total area) as well as mean ratio Alkyl-to-O-Alkyl. Data, which originates from [10] give ratios for 75 MHz ¹³C CP NMR of spectra of newly-shed litter and after 2 and 6 years of decomposition. Mean values refer to 10 foliage litter.

Litter species	Alkyl-C	Methoxy-C	O-Alkyl-C	Di-O-Alkyl-C	Aromatic-C	Phenolic-C	Carbonyl-C	Alkyl/O-Alkyl
	0–47	47–58	58–92	92–112	112–140	140–160	160–185
Mean newly shed	18.9	4.5	42.3	12.3	9.8	6.6	5.6	0.32
Mean 2 years	23.0	5.5	36.6	10.0	10.9	6.5	7.6	0.45
Mean 6 years	22.2	6.6	33.7	10.1	12.4	6.9	8.1	0.44