Progress in selected areas of rhizosphere research on P acquisition

被引:63
作者
Trolove, SN
Hedley, MJ
Kirk, GJD
Bolan, NS
Loganathan, P
机构
[1] Massey Univ, Soil & Earth Sci, Nat Resources Inst, Palmerston North, New Zealand
[2] Univ Cambridge, Dept Plant Sci, Cambridge CB2 3EA, England
来源
AUSTRALIAN JOURNAL OF SOIL RESEARCH | 2003年 / 41卷 / 03期
关键词
mycorrhizae; organic acid; P solubilisation; P uptake; soil-P fractions;
D O I
10.1071/SR02130
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Large reserves of P have accumulated in soils of developed countries because additions of P fertiliser to sustain agricultural production have exceeded crop removal. By contrast, in many developing countries in the tropics and subtropics, soil P reserves are gravely low and large additions are required before maintenance requirements begin to decline. In addition, the cost of P fertiliser will increase as the currently accessible deposits of high-grade phosphate rock (PR) diminish. Developing plants that efficiently tap soil P reserves and low grade PR is therefore a priority for agricultural research. For the 50th anniversary of the New Zealand Soil Science Society, this paper reviews research on P efficiency in plants, conducted by staff, students, and research associates of Massey University, in the context of other research into plant mechanisms that enhance P uptake, including effects of root geometry, mycorrhizal associations, and root-induced changes in the soil. Techniques for fractionation of soil P are highlighted.
引用
收藏
页码:471 / 499
页数:29
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