eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
113
129
10.21608/agro.2011.153
153
Original Article
Effect of Time and Methods of Nitrogen and Potassium Application at Different Growth Stages on Hybrid 1 and Giza 178 Rice Cultivare.
TWO FIELD experiments were carried out at the experimental farm of Rice Research & Training Centre, Sakha, Kafrelsheikh, Egypt to study the effect of nitrogen and potassium fertilization on growth characters, yield and its components of Hybrid rice1 and Giza 178 rice cultivar. The experimental design was a split-split plot design with four replicates, the main plots were assigned to rice cultivar, methods of nitrogen application treatments which were randomly distributed in sub plots as N1 1/2 basal +1/4 at Mid Tillering (MT) +1/4 at Late Boating (LB) and N2 (1/2 basal +1/4 at Mid Tillering + 2% sprayed at (LB) time and methods of potassium application were arranged in the sub-sub plot and assigned as (K1) 1/2 basal +1/2 as topdressing (TD) at L.B, (K2) 1/2 basal+1/4 TD at PI+1/4 TD at L.B, (K3) 1/2 basal +2 % foliar at PI +1/4 TD at LB, (K4) 1/2 basal+1/4 TD at PI+ 2% foliar at LB, (K5) 1/2 basal + 2 %foliar at PI + 2 % foliar at LB. The obtained results could be summarized as follows: In both seasons, the data showed that Hybrid rice1 recorded the highest values of the number of tiller/m2, the number of panicle/m2, the number of filled grain/panicle, 1000 grain weight, straw yield and grain yield compared with Giza 178 rice cultivar. Giza 178 recorded significantincrease in the flag leaf area, total chlorophyll content. Times and methods of nitrogen application as N2 caused significant increase in the flag leaf area and total chlorophyll content in both seasons and straw yield in the second season only, while N1 treatment gave significant increase in number of tillers /hill and number of panicles /hill in both seasons, while number of filled grains /panicle, grain yield (ton/fed) in 2008 season, Times and methods of potassium application caused significant effect in both seasons on plant height, total chlorophyll content, Number of filled grains. panicle-1, 1000- grain weight, grain and straw yields ton/fed-1. We can concluded that Hybride1 rice cultivar when treated with nitrogen as 1/2 of the dose as basal +1/4 at MT +1/4 at late boating stage (LB) and potassium application either as1/2 dose as basal +1/4 as foliar at PI (2% of K2O) +1/4 as TD at LB stage or as1/2 dose as basal +1/4 as TD at PI+ 1/4 as foliar at LB stage (2%of K2O) achieved the highest values of most studied characters and grain yield ton.fed-1.
https://agro.journals.ekb.eg/article_153_6ab14fa451d75ef4759b25b60f4ce727.pdf
Time and methods of nitrogen
Potassium application
Growth stage
Inbred & hybrid rice Cultivar
eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
131
140
10.21608/agro.2011.154
154
Original Article
Impact of Organic Fertilizer and Urea on Grain Yield of Rice Cultivar Giza 178 and Soil Organic Matter Content
TWO FIELD Experiments were carried out during summer seasons 2007 and 2008 at the experimental farm of Rice Research & Training Centre, Sakha, Kafrelsheikh, Egypt, to study the effect of organic fertilizers at rates (0,3,6,9 ton /fed) as Compost rice straw and inorganic fertilizer (at rate 0,100,150 kg urea/fed) on rice productivity and soil organic matter (SOM), the experimentaldesign system of layout was randomized complete block with four replications. The highest values of grain and straw yield in both seasons were recorded by the application of 9 tons composted rice straw (CRS) plus 150 kg urea fed-1. but the difference with the grain yield obtained with 6 tons CRS plus 150 kg urea fed-1 was not significant only in the second season. Also, when 6 tons CRS were applied the addition of 100 kg urea fed-1 or 150 kg urea fed-1 had similar effects on yield. There was a slight difference in 1000 grain weight among all treatments. The number of panicle.hill-1 increased significantly as fertilizer level increased from 0 kg N.fed-1 without CRS to 9 tons CRS plus 150 kg urea.fed-1. There was a significantdifference in panicle length at all treatments of CRS added either separated or combined with urea as compared with the control, Panicle length did not increase with fertilizer level although there was a significant treatment effect (application of CRS, in combination with urea or not) compared to the control. The percentage of soil organic matter in soil increased with increasing the amount of CRS either applied alone or with different levels of urea at all levels compared with the control and soil treated with urea alone. Results showed that organic matter had a significant effect on the percentage of soil organic matter and rice grain yield.
We can conclude that combination of Composted rice straw at rate 9 ton/fed with 150 kg urea/fed increased grain yield with percent 75.64 and 75.35 % over the control (without compost without urea) in 2007 and 2008 respectively and increased the percentage of soil organic matter which gave 2.41 and 2.23 % compared with the control treatment which recorded 1.40 and 1.4 % in both seasons, respectively.
https://agro.journals.ekb.eg/article_154_1d34cc6a7e57305f58ee50ab319ed145.pdf
Rice (Oryza sativa )
Organic fertilizer
soil organic matter
eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
141
154
10.21608/agro.2011.155
155
Original Article
Response of Barley ( Hordeum vulgare L.) Cultivars to Nitrogen Fertilizer with Sprinkler Irrigation under Sandy Soil Conditions
TWO FIELD experiments were carried out in the Experimental Farm, El-Khattara Region, Faculty of Agriculture, Zagazig University, Sharkia Governorate, Egypt during two winter successive seasons (2009/2010 – 2010/2011). The experiments aimed to study the response of hull-less barley cultivars (Giza 129, Giza 130 and Giza 131) to nitrogen fertilizer levels (40, 60 and 80 kg N/fed) under sprinkler irrigation in sandy soil conditions.
The obtained results could be summarized as follows: Significant differences between the three barley cultivars in all characters during both seasons and their combined were found. Where barley cultivar Giza 131 followed by barley cultivar Giza 130 recorded the highest values regarding plant height (77.7 and 77.6cm), spike length (6.9 and 6.5cm), number of spikelets per spike(54.6 and 53.9), number of grains per spike(42.25 and 37.82), grain weight per spike(1.80 and 1.66 g) and grain(1.533 and 1.455 ton) and straw yields (2.712 and 2.582 ton/fed), respectively. While Giza 129 gave the lowest values of plant height 75.4 cm, spike length 6.3 cm, no.of spikelets per spike 49.4, no.of grains per spike 37.3, grain weight per spike 1.58g, grain yield 1.445 and straw yield 2.512 ton per fed. The increase of N level from 40 to 60 and 80 kg N/fed was followed by a significant increase in mentioned characters in both seasons and their combined analysis. The significant interaction between the studied factors indicated that planting Giza 131 which receiving the higher dose of N (80 kg N/fed) exceeded those of cultivars Giza 129 and Giza 130. This is expected when Giza 131 gave the highest values of 1000-grain weight (39.36 gm) as well as grain yield (1.600 ton/fed) than those receiving 40 or 60 kg N/fed, whereas, the lower values (37.73 g and 1.542 ton/fed for previous traits, respectively) were achieved by planting Giza 129 and fertilized with the 1st dose of 40 kg N/fed, respectively. The yield could have been maximized to 1.607, 1.654 and 1.602 tons/fed due to predicted N addition of 111.11, 110.86 and 77.14 kg N/fed to cultivars of Giza 129, Giza 130 and Giza 131. Based on response equation, the highest optimum yields was 1.570 ton/fed by using of 99.56 kg N/fed were added to cultivar of Giza 130.
https://agro.journals.ekb.eg/article_155_30fd84f3b1f88c095c03841bc1bc5495.pdf
Naked Barley (nomenclature)
cultivars
nitrogen
Sprinkler irrigation
sandy soil
eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
155
166
10.21608/agro.2011.156
156
Original Article
Growth, Yield and Nitrogen Utilization Efficiency of Quinoa ( Chenopodium quinoa ) under Different Rates and Methods of Nitrogen Fertilization
TWO FIELD experiments were carried out in Tigzerti Research Station of Siwa Oasis, Desert Research Center, during two successive winter seasons of 2008 and 2009 to study growth, yield, yield components and N utilization efficiency of the pseudocereal quinoa (Chenopodium quinoa) under different rates and methods of N fertilization. Nitrogen fertilizer treatments were applied at four N rates of mineral fertilizer at the rate of 10 kg N/fed (as the control), 60, 80 and 100 kg N/fed; three split up doses of half the rates of mineral nitrogen (30, 40 and 50 kg N/fed with 10 m3 of organic manure for each as soil application) and foliar application of nitrogen at the concentrations 1, 2 and 3%. The results indicated that plant height, the number of basal branches and grain yield/fed were gradually increased with increasing the rate of nitrogen fertilizer up to the highest whether in the case of mineral application only, or in split dose of mineral with organic nitrogen or when nitrogen was applied as the foliar spray. Data also revealed that while the split dose of mineral with organic treatments was associated with highest values of these traits, foliar spray with nitrogen resulted in least values. The effect of the treatment imposed on nitrogen, protein, phosphorus and potassium contents in quinoa grains followed the general tendency of the treatment effect on growth and yield. N use efficiency was decreased with increasing mineral or foliar spray. On the other hand, there were relative increases in (NUE) when half mineral N dose with organic manure was applied. The Foliar application was associated with lower response as compared with other methods.
https://agro.journals.ekb.eg/article_156_8a62a1c28091d6794192a75e0e9b90b6.pdf
Soil
nitrogen
fertilization
Quinoa crop
seed yield
eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
167
178
10.21608/agro.2011.157
157
Original Article
Identifying Heat Tolerant Rice Genotypes under Field Conditions
DEVELOPMENT OF some rice genotypes tolerant to heat stress during different growth stages is one adaptation strategy for mitigating the negative effects of global warming. To this end, assessing the trait variation and identifying suitable genetic donors is essential. We assessed the genetic variability for heat tolerance-related traits in 20 diverse cultivars under heat stress (HS) and non-stress conditions (NS). The experiments were laid out in a randomized complete block design with three replications in New Valley Research Station (south of Egypt) as heat stress conditions and Sakha Research Station (north of Egypt) as non-stress conditions to assess the effects of high temperature during vegetative, reproductive and ripening growth phases on its growth, yield and yield components. Considerable variation of cultivars was observed among genotypes under HS and NS environments. Physiological parameters identifying heat tolerant variety is a necessary and is reliable and superior to all the screening procedures. High temperature induces sterility if the sensitive physiological processes are affected. The average grain yield decreased by 22% under HS relative to the NS environment, with high temperature having the greatest effect on spikelets and pollens sterility in New Valley conditions. Higher spikelet sterilities ranging between 14% and 80% were noted under HS than under NS (10% and 18%), while pollens sterility was also higher under HS (15% and 54 %) than under NS (16% and 34 %). Grain yield was negatively correlated with pollen and spikelet sterility under both HS and NS. Potential donors identified based on at least one trait included ARC11094, Pinulupot1, Tupa729, Shinriki, Kameji and Giza 178.
https://agro.journals.ekb.eg/article_157_c3475a475f6f67ffffb2d7e679bd2731.pdf
rice
heat tolerance
High temperature
Spikelet fertility
Grain yield
eng
National Information and Documentation Center (NIDOC), Academy of Scientific Research and Technology
Egyptian Journal of Agronomy
0379-3575
2357-0288
2011-12-31
33
2
179
188
10.21608/agro.2011.158
158
Original Article
Stability Performance of Some New Yellow Maize Genotypes Across Four Locations
THIS STUDY aimed to investigate the performance and stability across four environments i.e. Gemmeiza, Sakha, Sids andMallawy of eighteen genotypes of maize and two commercial checks hybrids (SC 155 and SC 3084). Combined analysis of variance of stability across environments indicated that significant genetic variability for all studied traits, as well as the environment indicatingdifferential effect of each environment. Sakha location produced the highest grain yield. Most of the hybrids had a significant deviation mean square from linear regression for grain yield implying that these hybrids were unstable across environments except for seven hybrids Gm 1, Gm 2, Gm 6, Gm 9, Gm 14, Gm 17 and Gm 18 which showed small and insignificant S2di estimates, indicating that these hybrids could be considered to be stable hybrids. It could be concluded that the five hybrids; SC Gm 1, SC Gm 5, SC Gm 8, SC Gm 3 and SC Gm 4 can be selected since they produced the highest grain yield, and were earlier than the two check crosses. Moreover, they achievedreasonable degree of stability across the four locations Gemmeiza, Sakha, Sids and Mallawy. These hybrids have to undergo progressive evaluations.
https://agro.journals.ekb.eg/article_158_19afabc357f09bfe33dff38f652cfa9f.pdf
stability
adaptability
Yellow Maize Environment