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Nutrient And Seed Rate Effect On Yield And Yield Contributing Characters Of Wheat At Agro Climatic (Subtropical) Condition Of Faisalabad

2938 words - 12 pages

A field study was conducted to evaluate the effect of different seed rates and nutrition on the yield of wheat; at Agronomic research area, University of Agriculture Faisalabad during 2008-2009.The experiment was laid out in a split plot design with three replications. The treatment comprises four different fertilizer level F0( Control no fertilizer), F1 ( 100-115-67 NPK kg ha-1 ), F2 ( 115-130-82 NPK kg ha-1) and F3 ( 130-145-97 NPK kg ha-1) with three different seed rate S1 (100 kg ha-1), S2( 125 kg ha-1), S3( 150 kg ha-1).Wheat variety Shafaq-2006 was planted. Results showed that different fertilizer level and seed rates affected significantly the various parameters under study especially ,plant height, spike length, number of spikelets spike-1, 1000-grain weight, economical yield and harvest index. Among the seed rates, 125 kg ha 1 produced significantly the highest grains yield (4.30 t ha-1) followed by 150 kg ha 1 seed rate (3.87 t ha-1).Regarding nutrition, F2 (115-130-82 NPK kg ha-1) fertilizer level produced significantly the highest grain yield (4.85 t ha-1

Keywords: Wheat; Seed rate, Fertilizer level; Yield

Introduction
Wheat (Triticum aestivum L.) is the most important cereal crop in the world, and is a staple food of about one third of the world’s population including Pakistan. In Pakistan wheat is the most important cereal crop both in terms of production and area under cultivation.Wheat was cultivated on an area of 9062 thousand hectares, showing an increase of 5.9 percent over last year’s area of 8550 thousand hectares. The size of wheat crop is provisionally estimated at 23.4 million tons (Government of Pakistan, 2009).
In Punjab (Pakistan), there are predominantly cotton-wheat-cotton and rice-wheat-rice cropping systems. The scarcity of the labor for cotton picking and late flowering span of the cotton varieties wastes a lot of time to harvest it. Because of this reason, it become harder to sow wheat at its proper time (Ihsanullah et al., 2002: Hameed et al., 2003). Delay in last picking of cotton and late ripening of basmati varieties of rice are the major causes of delayed planting of wheat. Delayed planting of wheat tends to reduce germination percent and no. of tillers unit-1 area because of sharp rise in temperature during tillering phase of the crop and ultimately decline in the wheat yield ( Soomro and Oad, 2002: Sadeghipour, 2008). In order to mitigate the deleterious effect of late sowing several researchers ( Aslam et al.,2003, Ahmad et al., 2007) suggested to increase the seed rate to compensate the reduction in germination percent and no. of tillers unit-1 area ( Jan et al., 2000).
Seed rate is an important agronomic parameter, which provides early canopy cover for the maximum interception of the solar radiation. This is achieved by producing more number of tillers unit-1 area to give higher yield. Early development of high leaf area index (LAI) in wheat can be promoted by increasing seeding...

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