TY - JOUR
T1 - Band placement of phosphorus improves the phosphorus use efficiency and wheat productivity under different irrigation regimes
AU - Rehim, Abdur
AU - Farooq, Muhammad
AU - Ahmad, Fiaz
AU - Hussain, Mubshar
PY - 2012
Y1 - 2012
N2 - This study was conducted to evaluate the phosphorus (P) application methods under different irrigation levels to maximize wheat yield and phosphorus use efficiency (PUE). P was applied at 0, 61, 104 and 142 kg P 2O 5 ha -1 as band placement or by broadcasting in wheat irrigated at four irrigation regimes (0, 2, 3 & 4 irrigations). Phosphorus levels were determined to adjusted soil solution P levels (0.0, 0.1, 0.2 & 0.3 mg P L-1) in soil solution by Freundlich Model. Increasing P rate up to 104 kg P 2O 5 ha -1 (0.2 mg P L -1 in soil solution) improved the grain yield, yield related traits, grain and straw P contents, total P uptake, net income and benefit-cost ratio (BCR) of wheat. However, P application at 61 and 142 kg P 2O 5 ha -1 (0.1 & 0.6 mg P L -1 in soil solution) caused higher PUE and Olsen P, respectively. Band placement was more effective and economical than broadcasting. Three irrigations at crown root initiation, booting and grain development stages were more economical to achieve higher grain yield and net income of wheat. In crux, band placement of P at 104 kg P 2O 5 ha -1 (0.2 mg P L -1 in soil solution) with 3 irrigations (at crown rooting, booting & grain development stages) is the best option to harvest maximum wheat productivity, PUE and net economic returns in sandy clay loam soils.
AB - This study was conducted to evaluate the phosphorus (P) application methods under different irrigation levels to maximize wheat yield and phosphorus use efficiency (PUE). P was applied at 0, 61, 104 and 142 kg P 2O 5 ha -1 as band placement or by broadcasting in wheat irrigated at four irrigation regimes (0, 2, 3 & 4 irrigations). Phosphorus levels were determined to adjusted soil solution P levels (0.0, 0.1, 0.2 & 0.3 mg P L-1) in soil solution by Freundlich Model. Increasing P rate up to 104 kg P 2O 5 ha -1 (0.2 mg P L -1 in soil solution) improved the grain yield, yield related traits, grain and straw P contents, total P uptake, net income and benefit-cost ratio (BCR) of wheat. However, P application at 61 and 142 kg P 2O 5 ha -1 (0.1 & 0.6 mg P L -1 in soil solution) caused higher PUE and Olsen P, respectively. Band placement was more effective and economical than broadcasting. Three irrigations at crown root initiation, booting and grain development stages were more economical to achieve higher grain yield and net income of wheat. In crux, band placement of P at 104 kg P 2O 5 ha -1 (0.2 mg P L -1 in soil solution) with 3 irrigations (at crown rooting, booting & grain development stages) is the best option to harvest maximum wheat productivity, PUE and net economic returns in sandy clay loam soils.
KW - Freundlich adsorption isotherms
KW - Grain yield
KW - Irrigation
KW - P application
KW - P uptake
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M3 - Article
AN - SCOPUS:84867739139
SN - 1560-8530
VL - 14
SP - 727
EP - 733
JO - International Journal of Agriculture and Biology
JF - International Journal of Agriculture and Biology
IS - 5
ER -