Effect Of Phosphorus Fertilization Rates And Split On Plant Uptake And Available Soil Residual Phosphorus In Calcareous Soil
Journal Title: Scientia Agriculturae - Year 2016, Vol 15, Issue 3
Abstract
A field experiment was conducted at the college of Agriculture and Forestry in Mosul University to evaluate the effect of splitting of phosphorus fertilization on plant uptake and available soil residual phosphorus in calcareous soil, wheat plant, variety Abugareeb was selected as a biological index. A randomized complete block design was used with three replications and ten treatments. Super phosphate (20% P2O5) was applied at three rates viz. 80,160 and 240 kgP2O5 ha-1 plus a control of 0kg ha-1. Each rate of fertilizer was split to three doses viz. split1:All P applied with seeds; split2: Half of P applied with seeds and second half applied ten weeks after seeding; split3: First half applied ten weeks after seeding and second half applied 14 weeks after seeding. Amount of 120 kgN ha-1 was applied to all treatments. Plant and soil samples of four growth stages (10 weeks, 14 weeks and 18 weeks post seeding, and after harvesting or 23 weeks) have been taken. The plant samples results showed a significant increasing of P uptake as fertilization rates increases, but the effect of splits was clear at last stages of plant life (3rd and 4th stages), there were a significant effects of split 2 as compared with the splits 1and 3. Soil analyses results also showed an increase of available residual P at all sampling stages with increasing of P rates, while there was decreasing of available P vs. time. The effect of splitting was significant for split 3 treatments at each P rate individually. The residual P status at 4th stage (after harvest) under the effect of splits in regardless to P rates can be rank as: split 1 < split 2 < split 3. NK uptake, P use efficiency and available soil residual NK also have been discussed.
Authors and Affiliations
Shukri I REKANI, Salih M Al-RASHIDI
Keywords
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- EP ID EP138896
- DOI 10.15192/PSCP.SA.2016.15.3.392397
- Views 127
- Downloads 0
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