樟子松针叶磷组分浓度与土壤有效磷浓度的关系  

Relationships between phosphorus fractions concentrations in Pinus sylvestris var. mongolica needles and soil available phosphorus

作　　者：刘兴宇[1] 赵琼[1] 曾德慧[1] 刘金环[1] 胡亚林[1] 邓东周[1] 王红[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》2008年第3期494-498,共5页Chinese Journal of Applied Ecology

基　　金：国家科技支撑计划项目(2006BAD26B0201-1);国家自然科学基金资助项目(30471377)

摘　　要：为弄清科尔沁沙地东南部樟子松人工林是否受土壤磷素供应的限制,找出反映土壤磷素供应状况的最佳叶片养分指标,分析了樟子松人工林不同年龄针叶中全磷、无机磷、有机磷和全氮浓度以及土壤有效磷浓度.结果表明:研究区樟子松人工林土壤有效磷浓度较低,为0.12～0.63mg.kg-1;土壤有效磷浓度与当年生针叶无机磷和全磷浓度显著相关,而与针叶全磷的相关性来源于针叶中无机磷与全磷的相关.与当年生针叶全磷浓度相比,针叶无机磷浓度能更为准确、直接地反映土壤的供磷水平.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·kg^-1 ）, and had significant correlations with the inorganic P （cPi） and total P （cPt） concentrations in the currentyear 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.

关 键 词：叶片磷组分 土壤磷供应 樟子松 

分 类 号：S791.253[农业科学—林木遗传育种]