The total K uptake for KF and NKF were 498.84 and 342.50 kg ha–1 (average across treatments), and
with a total K rate of 554 kg ha–1, K recovery was calculated (using the stated formula in materials and
methods) to be only 28.22%. Not discounting the contribution of diffusion to this recovery[23,24],
probably without the rooting system of pineapple, this recovery would have been lower. During growth, it
is known that the adventitious roots of pineapples form a short and compact system at the stem base, with
numerous strong roots and limited branching. However, under ideal conditions, the soil root system could
spread up to 1–2 m laterally and 0.85 m in depth[25]. It therefore could be that unlike in mineral soils, the
roots of pineapple in the peat soil were not very restricted or confined to the tilled area because of the
relatively low bulk density. This might have allowed the roots under the fertilized condition to access
larger volume of water and plants nutrients than those under the unfertilized condition. In addition,
increased K diffusion gradient under the fertilized condition might have also facilitated the uptake of K in
the fertilized plots[23,24].
The total K uptake for KF and NKF were 498.84 and 342.50 kg ha–1 (average across treatments), and
with a total K rate of 554 kg ha–1, K recovery was calculated (using the stated formula in materials and
methods) to be only 28.22%. Not discounting the contribution of diffusion to this recovery[23,24],
probably without the rooting system of pineapple, this recovery would have been lower. During growth, it
is known that the adventitious roots of pineapples form a short and compact system at the stem base, with
numerous strong roots and limited branching. However, under ideal conditions, the soil root system could
spread up to 1–2 m laterally and 0.85 m in depth[25]. It therefore could be that unlike in mineral soils, the
roots of pineapple in the peat soil were not very restricted or confined to the tilled area because of the
relatively low bulk density. This might have allowed the roots under the fertilized condition to access
larger volume of water and plants nutrients than those under the unfertilized condition. In addition,
increased K diffusion gradient under the fertilized condition might have also facilitated the uptake of K in
the fertilized plots[23,24].
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