title: [N cycle of rubber-tea-chicken agro-forestry model in tropical area of China].
abstract: The N cycle of rubber-tea-chicken eco-agricultural model, a typical tropical agro-forestry system in Wenchang municipality of Hainan province, was studied with quantitative experiment and qualitative analysis, compared with rubber and rubeer-tea systems. The results showed that the N cycling rate, N output and soil surplus N of chicken garden were all the highest, being 43%; 196.5% kg.hm-2 and 237.6 kg.hm-2, respectively. The N output/input rate of chicken sub-system was 91%, and the transformation rate was very high. Compared with the other two systems, the chicken garden had a decreased external N input rate, and its internal cycling N was the highest, being 824.1 kg.hm-2. Rubber-tea-chicken agro-forestry system had a rational N cycling structure, and its N cycle was most active.
authors.affiliation: Agro-ecological Research Institute, Zhejiang University, Hangzhou 310029. mqymqy@china.com
authors.forename: Q
authors.initials: Q
authors.lastname: Meng
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Song
mesh_terms: D000818:Animals; D002645:Chickens / Q000378:metabolism*; D002681:China; D017753:Ecosystem; D028482:Hevea / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D013662:Tea / Q000378:metabolism*; D014329:Tropical Climate
chemical_list: D012987:Soil; D013662:Tea; D009584:Nitrogen