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Seed size of maize hybrids [electronic resource]: II- effects on agronomic traits under new sandy soil conditions.

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Badran, M.S

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Language: English Summary language: Arabic Description: p.135-147Other title:

حجم الحبة لهجن الذرة الشامية: 2- تأثيرات على صفات محصولية تحت ظروف الأراضي الرملية الجديدة [Added title page title]

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Journal of agricultural and environmental sciences, 2007 v. 6 (2) [electronic resource].

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In: Journal of Agricultural and Environmental Sciences 2007.v.6(2)Summary: Many previous studies showed that grading hybrid seed based on size, had a little effect on grain yield. However, farmers are still concerned about using small seeds that may result from seed position on the ear or poor growing conditions. This study was carried out to clarify the effect of seeding the commercial maize hybrids, Single Cross 2010 (SC2010), ThreeWay Cross 310 (TWC310) and Three-Way Cross 321(TWC321) with different seed sizes (large, medium and small) on some agronomic traits and yield and its components under newly reclaimed sandy soil conditions. Two field experiments were conducted in a split-split plot, in a complete block design, with three replicates, in EI-Bostan Experimental Farm of College of Agriculture, Alexandria University during the two summer seasons of 2003 and 2004. The results indicated significant differences among the three hybrids in plant height, stem diameter and ear length in 2004 season, and kernel weight in 2003 season. The TWC310 had the highest plants, the longest ear and the thickest stem in 2004 season. Furthermore, the same hybrid had the heaviest kernels in 2003 season. Seed size had a significant effect on ear weight, where the large seed size resulted in the heaviest ears in both seasons. Other significant effects of seed size were observed on ear length, kernel weight and grain yield, where large seed size bad the longest ears and the heaviest kernels and tbe bigbest grain yield in 2003 season. In 2004 season, the small seed size bad significantly less stem diameter, shortest plants, shortest ear, lightest ears and lowest grain yield among the other seed sizes. Furthermore, there was a significant elfed of hybrids by seed size interaction on kernel weigbt .2003 season and on plant beigbt and grain yield in 2004 season Accordingly, it conld be conclnded tbat sowing hybrid maize witb graded large seed size migbt be more productive under newly reclaimed sandy soil conditions.

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Many previous studies showed that grading hybrid seed based on size, had a little effect on grain yield. However, farmers are still concerned about using small seeds that may result from seed position on the ear or poor growing conditions. This study was carried out to clarify the effect of seeding the commercial maize hybrids, Single Cross 2010 (SC2010), ThreeWay Cross 310 (TWC310) and Three-Way Cross 321(TWC321) with different seed sizes (large, medium and small) on some agronomic traits and yield and its components under newly reclaimed sandy soil conditions. Two field experiments were conducted in a split-split plot, in a complete block design, with three replicates, in EI-Bostan Experimental Farm of College of Agriculture, Alexandria University during the two summer seasons of 2003 and 2004. The results indicated significant differences among the three hybrids in plant height, stem diameter and ear length in 2004 season, and kernel weight in 2003 season. The TWC310 had the highest plants, the longest ear and the thickest stem in 2004 season. Furthermore, the same hybrid had the heaviest kernels in 2003 season. Seed size had a significant effect on ear weight, where the large seed size resulted in the heaviest ears in both seasons. Other significant effects of seed size were observed on ear length, kernel weight and grain yield, where large seed size bad the longest ears and the heaviest kernels and tbe bigbest grain yield in 2003 season. In 2004 season, the small seed size bad significantly less stem diameter, shortest plants, shortest ear, lightest ears and lowest grain yield among the other seed sizes. Furthermore, there was a significant elfed of hybrids by seed size interaction on kernel weigbt .2003 season and on plant beigbt and grain yield in 2004 season Accordingly, it conld be conclnded tbat sowing hybrid maize witb graded large seed size migbt be more productive under newly reclaimed sandy soil conditions.

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