| Abstract: |
Two field experiments were carried out during two successive seasons of 2000/2001 and 2001/2002 at two locations i.e. El-Khattara Project Farm Fac. Of Agric. Zagazig Univ. Egypt (Sharkia Governorate) and the Experimental Farm of El-Arish (North Saini) to evaluate growth, yield and its attributes of some long-spike wheat cultivars (Sids 7, 8, 9, Gemmeiza 7 and 9), under different plant densities (300, 400 and 500 grain/m2) and N fertilizer levels (80, 100 and 120 kgN/fad.) on growth, yield and yield attributes.Split-split plot design with three replications was followed in both seasons and at both locations. The results indicated that:A- Growth: At 65, 80 and 95 DAS growth stages, Sids cultivars had the tallest plants, produced much number of leaves / plant and heavier plants, but produced the lowest number of tillers/m2 and wider leaf area / plant compared with Gemmeiza cultivars at different growth stages. Increasing planting density from 300 or 400 to 500 grain/m2 increased plant height, number of tillers/m2 and leaf area index. While decreased leaf area/plant and number of leaves plant. Increasing N-level from 80 or 100 to 120 kg N/fad showed positive response of plant height, number of tillers /m2, number of leaves/plant and leaf area / plant.B- Yield and yield attributes: At harvest. Sids cultivars had the longest spikes, heaviest grain weight/spike, number of grains/spike, 1000 -grain weight, higher crop index and higher grain yield / fad. than Gemmeiza cultivars at both locations. Increasing planting densities from 300 or 400 to 500 grain/m2 increased significantly plant height, number of tillers and spikes/m2, grain, straw and biological yields/fad. at both locations. However, it decreased spike length, number of spikelets / spike, number of grains/spike, grain weight / spike, 1000 grain weight and migration coefficient at El-Khattara and El-Arish locations. Increasing N-levels from 80 or 100 to 120 kg N/fad showed positive effects on all studied characters at both locations.
|
|
|