Effects of Fertilization on the Distribution Patterns of Biomass and Carbon Storage in Moso Bamboo Forest, Western Fujian Province, China
To study the effects of fertilization on the distribution patterns of biomass and carbon storage in Moso bamboo(Phyllostachys edulis), taking the non-fertilized Moso bamboo forest as the control, Moso bamboo forests with five fertilization types, including 5-year application of specialized fertilizer for bamboo( Ⅰ), 5-year formula NPK-fertilizer(Ⅱ), 5-year organic fertilizer(Ⅲ), and 1-year application of specialized fertilizer for bamboo(Ⅳ),1-year organic fertilizer(Ⅳ) were selected as the research object in Yong ' an City. The results showed that: 1)Fertilization could increase the biomass of P. edulis, which was in order of Ⅲ(91.18 t/hm2)Ⅰ(83.61 t/hm2)Ⅱ(71.38 t/hm2)Ⅴ(71.12 t/hm2)Ⅳ(65.13 t/hm2)Ⅵ(57.83 t/hm2); Fertilization could improve aboveground biomass,including leaf, branch, stem biomass, and increase the proportions to total biomass. Meanwhile, the ratio of above-/below-ground biomass increased in the order of 5-year fertilization application( Ⅰ, Ⅱ, Ⅲ) 1-year fertilization application(Ⅵ, Ⅴ)non-fertilization application. 2)The carbon stock of standing bamboos ranged from 28.37 to45.99 t C/hm2 with the highest value in 5-year application of organic fertilizer(Ⅲ) and the lowest value in nonfertilization application(Ⅵ). Stem was a major contributor to the total carbon storage, while leaf contributed less than 4%. Compared with bamboo forest with non-fertilization application, aboveground carbon storage was improved after the application fertilization. 3)Net primary productivity, annual fixation carbon and annual carbon dioxide sequestration of standing bamboos were in the order of Ⅲ Ⅰ Ⅱ Ⅴ Ⅳ Ⅵ with the values of annual carbon dioxide sequestration of 41.42, 41.17, 30.99, 23.47, 20.69, 20.00 t/(hm2·a), respectively. The timing of fertilizationapplication had gerat impacts on annual net productivity, and 5-year fertilization application(Ⅰ,Ⅱ,Ⅲ) were able to significantly improve net annual productivity in P. edulis forest.