TY - JOUR
AU - Goss, Michael
AB - 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 (17 yr), 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 (<0.10 m deep). This decline was accompanied by a decline in oxalate extractable P, dithionite extractable P and inorganic P (0.5 m 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 [Ca3(PO4)2].
TI - Changes in soil phosphorus pools of grasslands following 17 yrs of balanced application of manure and fertilizer
JF - Soil Use and Management
DO - 10.1111/sum.12333
DA - 2017-03-01
UR - https://www.deepdyve.com/lp/wiley/changes-in-soil-phosphorus-pools-of-grasslands-following-17-yrs-of-FuWzK6KQ7c
SP - 2
EP - 12
VL - 33
IS - 1
DP - DeepDyve
ER -