沙地樟子松人工林土壤磷素转化的根际效应

被引：20

作者：

赵琼

曾德慧

于占源

邓斌

范志平

机构：

[1] 中国科学院沈阳应用生态研究所大青沟沙地生态实验站

来源：

应用生态学报 | 2006年 / 08期

关键词：

樟子松人工林; 根际效应; 有机磷矿化; 土壤酸化; 磷素有效性;

D O I：

10.13287/j.1001-9332.2006.0273

中图分类号：

S791.253 [樟子松];

学科分类号：

摘要：

对大青沟自然保护区内不同年龄樟子松人工林根际和非根际土壤中不同形态磷素含量和酸性磷酸单酯酶(AP)活性进行了比较.结果表明,樟子松根系活动显著地提高了根际土壤有机碳含量及有机质的C/P比,增强了土壤微生物活动和AP活性,促进了有机磷的可利用性与矿化;显著地降低了土壤pH值,促进了Ca-P的溶解;从而提高了土壤磷素的有效性,促进了有机磷和Ca-P向Fe-P、Al-P的转化.与AP活性的根际效应相反,随林龄增加,樟子松对各形态磷素的根际效应逐渐增强,根际和非根际土壤中各形态磷素的变化趋势基本一致,土壤全磷和有机磷含量逐渐下降,而活性磷含量升高.为了保持土壤有机磷库和磷素的持续供应,必须对地被物予以保护.

引用

页码：1377 / 1381

页数：5

共 7 条

[1] Phosphorus retention and movement across an ombrotrophic-minerotrophic peatland gradient [J].

Kellogg, LE ;

Bridgham, SD .

BIOGEOCHEMISTRY, 2003, 63 (03) :299-315

[2] Effects of plant species on phosphorus availability in a range of grassland soils [J].

Chen, CR ;

Condron, LM ;

Sinaj, S ;

Davis, MR ;

Sherlock, RR ;

Frossard, E .

PLANT AND SOIL, 2003, 256 (01) :115-130

[3] Biological and geochemical controls on phosphorus fractions in semiarid soils [J].

Cross, AF ;

Schlesinger, WH .

BIOGEOCHEMISTRY, 2001, 52 (02) :155-172

[4]

Bioavailability of soil inorganic P in the rhizosphere as affected by root-induced chemical changes: a review[J] . Philippe Hinsinger.Plant and Soil . 2001 (2)

[5]

Rhizospheric Processes Influencing the Biogeochemistry of Forest Ecosystems[J] . G.R. Gobran,S. Clegg,F. Courchesne.Biogeochemistry . 1998 (1)

[6]

Uptake of 32 P from labelled organic matter, by mycorrhizal and non-mycorrhizal subterranean clover （ Trifolium subterraneum L.）[J] . Erik J Joner,Iver Jakobsen.Plant and Soil . 1995 (2)

[7]

Influence of conifers on the forms of phosphorus in selected New Zealand grassland soils[J] . L. M. Condron,I. S. Cornforth,M. R. Davis,R. H. Newman.Biology and Fertility of Soils . 1996 (1)

← 1 →