Changes in soil phosphorus pools of grasslands following 17yrs of balanced application of manure and fertilizer

被引：23

作者：

van der Salm, C. ^{[1
,3
]}

van Middelkoop, J. C. ^{[2
]}

Ehlert, P. A. I. ^{[1
]}

机构：

[1] Wageningen Environm Res, POB 47, NL-6700 AA Wageningen, Netherlands

[2] Wageningen Livestock Res, POB 388, NL-6700 AH Wageningen, Netherlands

[3] Wageningen Univ & Res, Business Unit Greenhouse Hort, POB 20, NL-2665 ZG Bleiswijk, Netherlands

来源：

SOIL USE AND MANAGEMENT | 2017年 / 33卷 / 01期

关键词：

Soil test P; soil P balance; balanced fertilizer application; grassland; long-term experiments; CROP YIELD; NITROGEN; AVAILABILITY; DYNAMICS; FORMS; FIELD;

D O I：

10.1111/sum.12333

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Limiting the use of phosphorous (P) in intensive agriculture is necessary to decrease losses to surface waters. Balanced fertilizer application (P supply equals P offtake by the crop) is a first step to limit the use of P. However, it is questioned whether this balance approach is sufficient to maintain soil fertility. A long-term field experiment (17yr), on grazed grassland, has been conducted on sandy soil, marine clay soil and peat soil to obtain insight into the effects of balanced P fertilizer application on soil test P values and to explain the results by changes in P pools in the soil. The balance approach led to a gradual decline in plant available P, measured as P-AL, in the topsoil (<0.10m deep). This decline was accompanied by a decline in oxalate extractable P, dithionite extractable P and inorganic P (0.5m H2SO4). The decline in these mineral P pools in the topsoil was (partly) compensated by an increase in the amount of organic P. There was evidence for the accumulation of P in an occluded form, especially at one of sites which received P as Gafsa rock phosphate [Ca-3(PO4)(2)].

引用

页码：2 / 12

页数：11