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Pak. J. Bot., 47(SI): 281-287, 2015.

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DRY MATTER PARTITIONING AND GRAIN YIELD OF WHEAT AS AFFECTED BY PHOSPHORUS AND ITS APPLICATIONS

MOHAMMAD SHAFI^1*, RAEES ZAMAN¹, JEHAN BAKHT², YOUSAF HAYAT³

AND SHAHEENSHAH

¹Department of Agronomy University of Agriculture Peshawar, Pakistan

²Institute of Biotechnology and Genetic Engineering University of Agriculture Peshawar, Pakistan

³Department of Statistics University of Agriculture Peshawar, Pakistan

*Corresponding author e-mail: mshafi.aup@gmail.com

Abstract: The present experiment was conducted to study the effect of phosphorus levels and its application methods on wheat varieties using randomized complete block design (RCBD) with split plot arrangement. Wheat varieties (i.e. Siran-10, Atta Habib and Pirsabak-04) were assigned to main plots. Phosphorus levels (i.e. 35, 70, and 105 kg ha^-1) and its application methods (i.e. Broadcast, side dressed and pop-up) were allotted to sub plots. Highest leaf dry weight (0.70 g) , stem dry weight (1.74 g), spike dry weight (0.99 g), productive tiller m^-2 (355), spike length (9.98 cm), grains spike^-1 (48.97), grain weight spike^-1 (2.09 g), thousand grains weight (42.85 g) and grain yield (3949 kg ha^-1) were recorded  from Siran-10. Application of 105 kg P ha^-1 produced maximum leaf dry weight (0.69 g) , stem dry weight (1.85 g), spike dry weight (1.06 g), productive tillers m^-2 (386), spike length (10.09 cm), grains spike^-1 (52.76), grain weight spike^-1 (2.21 g), thousand grain weight (42.03 g) and grain yield (4011 kg ha^-1). Application method (pop-up) produced maximum leaf dry weight (0.71 g), stem dry weight (1.80 g), spike dry weight (1.02 g), productive tillers m^-2 (370), spike length (9.87 cm), grains spike^-1 (50.96), grain weight spike^-1(2.09 g)^, thousand grains weight (42 g) and  grain yield (4068 kg ha^-1). It is concluded that application of phosphorus 105 kg ha^-1 with pop-up application method produced maximum numbers of productive tillers (399), grain spike^-1 (55) and grain yield (3949 kg ha^-1). Highest grain yield (3949 kg ha^-1) was recorded from Wheat variety (Siran-10) compared with other varieties.

Key Words: Wheat, Dry matter, Grain yield, Phosphorus, Application methods