[Relationships between phosphorus fractions concentrations in Pinus sylvestris var. mongolica needles and soil available phosphorus].
To make clear whether Mongolian pine (Pinus sylvestris var. mongolica) plantation is limited by soil phosphorus (P) supply in southeast Horqin sand land and to find out the best leaf indicator of soil P supply, the concentrations of total P, inorganic P and organic P in the needles of different age of P. sylvestris var. mongolica and the soil available P were analyzed. The results showed that in the study area, soil available P was rather low (0.12-0.63 mg x kg(-1)), and had significant correlations with the inorganic P (cPi) and total P (cPt) concentrations in the current-year needles of P. sylvestris var. mongolica. The significant correlation between soil available P and needle cPt derived from the significant correlation between cPi and cPt. Compared with cPt, cPi could reflect the level of soil P supply more accurately and directly.
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. liuxingyu05@hotmail.com
Xing-Yu
XY
Liu
Qiong
Q
Zhao
De-Hui
DH
Zeng
Jin-Huan
JH
Liu
Ya-Lin
YL
Hu
Dong-Zhou
DZ
Deng
Hong
H
Wang
D002681:China; D003889:Desert Climate; D017753:Ecosystem; D009930:Organic Chemicals / Q000032:analysis / Q000378:metabolism; D010758:Phosphorus / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D028223:Pinus / Q000254:growth & development / Q000378:metabolism*; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism*; D012987:Soil / Q000032:analysis*
D009930:Organic Chemicals; D012987:Soil; D010758:Phosphorus