ANALYSIS OF THE RESPONSE CURVES OF WHEAT YIELD TO NITROGEN FERTILIZATION AS RELATED TO ENVIRONMENT POLLUTION
Hayam Mohamed said Mahmoud;
Abstract
SUMMARY
Two field experiments were conducted at Giza Agricultural Research Station, Agricultural Research Center, Giza Governorate, Egypt during the two seasons of 2009/2010 and 2010/2011.
The experiments aimed to study the response of some wheat cultivars namely: Giza 168, Sakha 94, Gemmeiza 10 and Sids 12 to different N fertilizer levels ( 0, 25, 50, 75, 100, 125 kg N/fad) and determine the degree of the response of grain yield to N fertilizer levels in order to estimate the economic optimum N rate. Also, to investigate the relationship between grain yield and some related characters using multivariate procedures, i.e. correlation and path-coefficient analysis.
The design used was strip-plot in three replications. Wheat cultivars were arranged in the vertical strips while N levels were allocated in the horizontal strips. The experimental unit area was 8.4 m2 consisting of 12 rows each of 3.5 m in length and 20 cm apart. Sowing date was Dec.8th in the two seasons. All agricultural practices of wheat growing in Giza region were done as recommended. Data on growth, grain and straw yields and yield components were collected. The results could be summarized as follows:
Effect of cultivars:
1. Plants of Sakha 94 were the earliest in flowering followed by Giza 168 cultivar, Gemmeiza 10, and Sids 12 in the first season, while in the second one, Giza 168 cultivar flowered earlier followed by Sakha 94 without significant difference, but significantly differed with Sids 12 and Gemmeiza 10.
2. Sakha 94 cultivar was significantly the earliest in maturity (113.28 days from planting) followed by Giza 168, Gemmeiza 10 and Sids 12 in the first season. The tested cultivars could be arranged in the second season as follows: Sids 12 cultivar (matured after 108.5 days), Gemmeiza 10 (after 109.61days), Giza 168 (after 110.61days) and Sakha 94 (after 111.50 days).
3. Wheat cultivars had significant effect on Plant height in the second season only. The tallest plants were produced by Sids 12 cultivar (92.92 cm) and the shortest plants were given by Gemmeiza 10 cultivar (82.97 cm).
4. The results showed marked differences in flag leaf area among the tested wheat cultivars. Giza 168 (in the first season) and Sids 12 (in the second one) cultivars were superior to the other cultivars in flag leaf area.
5. The results clearly showed significant differences among the tested cultivars regarding number of spikes/m2 in both seasons. The highest number of spikes/m2 in the first season was produced by Giza 168 cultivar being 242 spikes/m2. Sids 12 cultivar ranked second followed by Gemmeiza 10 and Sakha 94. In the second season, Sids 12 cultivar ranked the first producing 266.22 spikes/m2 followed by Gemmeiza 10, Sids 12 and Sakha 94.
6. The tested wheat cultivars significantly affected spike length in the two seasons. In the first season, Gemmeiza 10 cultivar was superior to the other cultivars producing the longest spike being 11.04 cm. Sids 12 gave the shortest spike being 9.86 cm. In the second season, Sids 12 cultivar ranked first giving spike length of 12.77 cm followed by Gemmeiza 10 cultivar (12.36 cm). Giza 168 cultivar produced the shortest spike being 10.36 cm.
7. Number of spikelets/spike was significantly affected by wheat cultivars in both seasons. the highest number of spikelets/spike was produced by Sids 12 cultivar in the two seasons being 16.72 and 19.28, respectively. Sakha 94 and Giza 168 cultivars produced the lowest number of spikelets/spike in both seasons, respectively.
8. The evaluated cultivars were significantly different in number of kernels/spike in both seasons. In the first one, Sakha 94 cultivar produced the highest number of kernels/spike being 58.82 followed by Sids 12 (58.73). In the second season, Sids 12 cultivar ranked the first producing 69.72 kernels/spike followed by Gemmeiza 10 (69.61) without significant difference. The lowest number of kernels/spike was given by Gemmeiza 10 and Giza 168 cultivars in the first and second seasons, respectively.
9. Significant differences were observed in weight of kernels/spike among the tested wheat cultivars in both seasons. In the first season, Sids 12 cultivar gave the heaviest weight of kernels/spike followed by Giza 168 and Gemmeiza 10 without significant differences. In the second season, the heaviest weight of kernels/spike was given by Sids 12 followed by Gemmeiza 10. Sakha 94 and Giza 168 gave the lowest weight of kernels/spike in both seasons, respectively.
10. The tested cultivars significantly affected 1000-kernel weight in the second season only. Gemmeiza 10 recorded the highest weight of 1000 kernels being 62.89 gm followed by Sids12 (62.78gm)
Two field experiments were conducted at Giza Agricultural Research Station, Agricultural Research Center, Giza Governorate, Egypt during the two seasons of 2009/2010 and 2010/2011.
The experiments aimed to study the response of some wheat cultivars namely: Giza 168, Sakha 94, Gemmeiza 10 and Sids 12 to different N fertilizer levels ( 0, 25, 50, 75, 100, 125 kg N/fad) and determine the degree of the response of grain yield to N fertilizer levels in order to estimate the economic optimum N rate. Also, to investigate the relationship between grain yield and some related characters using multivariate procedures, i.e. correlation and path-coefficient analysis.
The design used was strip-plot in three replications. Wheat cultivars were arranged in the vertical strips while N levels were allocated in the horizontal strips. The experimental unit area was 8.4 m2 consisting of 12 rows each of 3.5 m in length and 20 cm apart. Sowing date was Dec.8th in the two seasons. All agricultural practices of wheat growing in Giza region were done as recommended. Data on growth, grain and straw yields and yield components were collected. The results could be summarized as follows:
Effect of cultivars:
1. Plants of Sakha 94 were the earliest in flowering followed by Giza 168 cultivar, Gemmeiza 10, and Sids 12 in the first season, while in the second one, Giza 168 cultivar flowered earlier followed by Sakha 94 without significant difference, but significantly differed with Sids 12 and Gemmeiza 10.
2. Sakha 94 cultivar was significantly the earliest in maturity (113.28 days from planting) followed by Giza 168, Gemmeiza 10 and Sids 12 in the first season. The tested cultivars could be arranged in the second season as follows: Sids 12 cultivar (matured after 108.5 days), Gemmeiza 10 (after 109.61days), Giza 168 (after 110.61days) and Sakha 94 (after 111.50 days).
3. Wheat cultivars had significant effect on Plant height in the second season only. The tallest plants were produced by Sids 12 cultivar (92.92 cm) and the shortest plants were given by Gemmeiza 10 cultivar (82.97 cm).
4. The results showed marked differences in flag leaf area among the tested wheat cultivars. Giza 168 (in the first season) and Sids 12 (in the second one) cultivars were superior to the other cultivars in flag leaf area.
5. The results clearly showed significant differences among the tested cultivars regarding number of spikes/m2 in both seasons. The highest number of spikes/m2 in the first season was produced by Giza 168 cultivar being 242 spikes/m2. Sids 12 cultivar ranked second followed by Gemmeiza 10 and Sakha 94. In the second season, Sids 12 cultivar ranked the first producing 266.22 spikes/m2 followed by Gemmeiza 10, Sids 12 and Sakha 94.
6. The tested wheat cultivars significantly affected spike length in the two seasons. In the first season, Gemmeiza 10 cultivar was superior to the other cultivars producing the longest spike being 11.04 cm. Sids 12 gave the shortest spike being 9.86 cm. In the second season, Sids 12 cultivar ranked first giving spike length of 12.77 cm followed by Gemmeiza 10 cultivar (12.36 cm). Giza 168 cultivar produced the shortest spike being 10.36 cm.
7. Number of spikelets/spike was significantly affected by wheat cultivars in both seasons. the highest number of spikelets/spike was produced by Sids 12 cultivar in the two seasons being 16.72 and 19.28, respectively. Sakha 94 and Giza 168 cultivars produced the lowest number of spikelets/spike in both seasons, respectively.
8. The evaluated cultivars were significantly different in number of kernels/spike in both seasons. In the first one, Sakha 94 cultivar produced the highest number of kernels/spike being 58.82 followed by Sids 12 (58.73). In the second season, Sids 12 cultivar ranked the first producing 69.72 kernels/spike followed by Gemmeiza 10 (69.61) without significant difference. The lowest number of kernels/spike was given by Gemmeiza 10 and Giza 168 cultivars in the first and second seasons, respectively.
9. Significant differences were observed in weight of kernels/spike among the tested wheat cultivars in both seasons. In the first season, Sids 12 cultivar gave the heaviest weight of kernels/spike followed by Giza 168 and Gemmeiza 10 without significant differences. In the second season, the heaviest weight of kernels/spike was given by Sids 12 followed by Gemmeiza 10. Sakha 94 and Giza 168 gave the lowest weight of kernels/spike in both seasons, respectively.
10. The tested cultivars significantly affected 1000-kernel weight in the second season only. Gemmeiza 10 recorded the highest weight of 1000 kernels being 62.89 gm followed by Sids12 (62.78gm)
Other data
| Title | ANALYSIS OF THE RESPONSE CURVES OF WHEAT YIELD TO NITROGEN FERTILIZATION AS RELATED TO ENVIRONMENT POLLUTION | Other Titles | تحليل منحنيات استجابة محصول القمح للتسميد الآزوتي وعلاقته بتلوث البيئة | Authors | Hayam Mohamed said Mahmoud | Issue Date | 2014 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.