title: [Distribution of fine root biomass of main planting tree species in Loess Plateau, China].
abstract: The distribution of fine roots of Pinus tabuliformis, Populus tomentosa, Prunus armeniaca, Robinia pseudoacacia, Hippophae rhamnoides, and Caragana korshinskii was investigated by using soil core method and the fine root was defined as root with diameter less than 2 mm. The soil moisture and soil properties were measured. The results showed that in the horizontal direction, the distribution of fine root biomass of P. tabuliformis presented a conic curve, and the fine root biomass of the other species expressed logarithm correlation. Radial roots developed, the fine root biomass were concentrated within the scope of the 2-3 times crown, indicating that trees extended their roots laterally to seek water farther from the tree. In the vertical direction, the fine root biomass decreased with the increasing soil depth. Fine root biomass had significant negative correlation with soil water content and bulk density, while significant positive correlation with organic matter and total N contents.
authors.forename: Sheng-Qi
authors.initials: SQ
authors.lastname: Jian
authors.forename: Chuan-Yan
authors.initials: CY
authors.lastname: Zhao
authors.forename: Shu-Min
authors.initials: SM
authors.lastname: Fang
authors.forename: Kai
authors.initials: K
authors.lastname: Yu
mesh_terms: D018533:Biomass; D032602:Caragana; D002681:China; D031281:Hippophae; D028223:Pinus; D018517:Plant Roots / Q000254:growth & development*; D032107:Populus; D027861:Prunus; D031301:Robinia; D012987:Soil; D014197:Trees / Q000254:growth & development*; D014867:Water
chemical_list: D012987:Soil; D014867:Water