title: [Productivity of crop-fruit ecological agriculture in middle-south Loess Plateau].
abstract: With the Xipo, Feimahe and Nangou villages as test objects, the productive characteristics of crop-fruit ecological agriculture in the middle-south Loess Plateau were investigated. The results showed that the biomass productivity of a plant was different with its organs, the highest for grain or fruit, and followed by stem, leaf and root. In the crop-fruit ecological agriculture, the higher ratio the crop subsystem, the higher productivity its biomass, the lower economic productivity and lower economic value was; while the fruit subsystem was on the contrary. The productivity of livestock farming subsystem was in a lower level, which restricted the increase of the total ecosystem's productivity. Based on these results, a countermeasure of increasing the ecosystem productivity was put forward.
authors.affiliation: College of Resources and Environmental Science, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China. wufaqi@263.net
authors.forename: Faqi
authors.initials: F
authors.lastname: Wu
authors.forename: Zhengli
authors.initials: Z
authors.lastname: Zhou
authors.forename: Haibin
authors.initials: H
authors.lastname: Liu
mesh_terms: D018533:Biomass; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D027845:Malus / Q000254:growth & development*; D012987:Soil
chemical_list: D012987:Soil