Two field experiments were carried out at Gemmeiza Agricultural Research Station, Gharbia Governorate during two seasons (2008 and 2009) to study the effect of four aminototal concentrations (i.e without, 1g/L, 2g/L and 3g/L) under three N rates (15, 30. and 45 Kg N/fad.) and their interaction on leaf chemical composition, seed and fiber quality of the Egyptian cotton cultivar, Giza 86. Results indicated that the differences between N rates for leaf N content, seed index, protein and oil % were significant, where, lint %, micronaire reading and pressley index were insignificant in the two seasons. Rate of N fertilizer 45 kg N/fad. gave the highest values for leaf N content, seed index, protein and oil %, while, 30 kg N/fad. gave the highest values for leaf k content in the both seasons. Foliar application of aminototal gave a significant effect on leaf N and K contents, seed index, protein and oil %, on the other hand, lint %, micronaire reading and Pressley index were insignificant in the two seasons. Foliar cotton plants with 3g/L or 2g/L concentration from aminototal gave the highest values of most studied attributes. The interaction between N rates and aminototal concentrations were significant for most studied traits except lint %, micronair reading and Pressley index in the two seasons. Also, results show that, fertilization cotton plants with 30 kg N/fad. and sprayed with 2 g/L aminototal improved the fiber and seed quality under the experiment soil conditions.
ABSTEACTTwo field experiments were carried out in El-Gemmeiza Agricultural Research Station Agricultural Research Center, El-Gharbiya Governorate in 2016 and 2017 seasons to study the effect of foliar application with bentonite (times of application and rates) on leaf chemical composition, plant growth, earliness traits, fiber quality and yield of Egyptian cotton (Gossypium barbadense L.), Giza 86 cultivar. A split-plot design with three replicates was used. The main plots included three intervals at (squaring stage and flowering initiation), at (flowering initiation and the top of flowering) and at (squaring stage, flowering initiation and the top of flowering). The sub plots involved four rates of bentonite; (control "without application", spraying with 2, 3 and 4 kg bentonite/fed). The important results could be summarized as follow: Times of foliar application with bentonite gave significant effect on nitrogen, potassium, phosphorus, chlorophyll (a), (b), total chlorophyll and carotenoids concentrations in cotton leaves, in favor of foliar application with bentonite three times (at squaring stage, at flowering initiation and at the top of flowering). Leaves concentrations of nitrogen, potassium, phosphorus, chlorophyll (a), (b), total chlorophyll and carotenoids significantly increased with foliar application of 3kg bentonite /fed as compared with the other rates.The interaction between times of bentonite as foliar spraying and its rates had significant effect on chlorophyll (a), (b), total chlorophyll and carotenoids concentrations in cotton leaves, where foliar spraying with 3kg bentonite per fed three times (at squaring stage, at flowering initiation and at the top of flowering) produced the highest values of these traits. While, leaves N, P and K concentrations did not affect by this interaction. Times of application did not affect plant height and number of fruiting branches/ plant at harvest in both seasons. Bentonite at the rate of 2kg/fed significantly increased cotton growth parameters, i.e., plant height and number of fruiting branches/ plant at harvest as compared with the high rate of betonies(4kg/fed) in both seasons. The interaction significantly affected these two traits in the first season only, where the highest values of cotton growth parameters, i.e., plant height and number of fruiting branches/ plant were, generally, recorded with foliar application of bentonite at the rate of 2kg/fed three times(at squaring stage, at flowering initiation and at the top of flowering). However, the lowest values were recorded with foliar application of bentonite at the rate of 4kg/fed three times (at squaring stage, at flowering initiation and at the top of flowering).Times of foliar application with bentonite gave insignificant effect on earliness traits (numbers of total flowers and total bolls / plant, boll setting % and boll shedding %) in both seasons.Bentonite at the rate of 2kg/fed and at the rate of 3kg/fed significantly increased earliness traits (numbers of total flowers and total bolls / plant a...
Two field experiments were carried out at Gemmeiza Agricultural Research Station, Gharbia Governorate during two seasons (2008 and 2009) to study the effect of four aminototal concentration (i.e without, 1g/L, 2g/L and 3g/L) under three N (15, 30. and 45 Kg N/fad.) and their interaction on leaf chemical composition, yield and yield components of the Egyptian cotton cultivar, Giza 86. Results indicated that the differences between N rates for leaf N content, number of fruiting branches / plant, plant height, number of flowers and bolls / plant, earliness %, boll weight , seed cotton yield per plant and per fad. were significant in the two seasons, where, boll setting % and boll shedding % were significant in the first season only. Rate of N fertilizer 45 kg N/fad. Gave the highest values for leaf N content, number of fruiting branches per plant and plant height, where, 30 kg N/fad. Gave the highest values for leaf K content, number of flowers and bolls per plant , boll weight, seed cotton yield / plant and per fad., on the other hand, 15 kg N/fad gave the best values for earliness % in the both seasons. The differences between 45 kg N/fad and 30 kg N/fad. were insignificant for all studied traits in the both seasons. Foliar application of aminototal gave a significant effect on leaf N and K contents, number of fruiting branches per plant, plant height, number of flowers and bolls per plant, boll weight, seed cotton yield per plant and per fad. on the other hand, earliness %, boll setting and boll shedding % were insignificant in the two seasons. Foliar cotton plants with concentration of 3 or 2g/L from aminototal gave the highest values of most studied attributes. The differences between 2g and 3g/L aminototal were in significant of all studied traits.The interaction between N rates and aminototal concentration were significant for all studied traits except earliness % in the two seasons. Also, results show that, fertilization cotton plants with 30 kg N/fad. and sprayed with 2g/L aminototal increased the yield and yield components under experiment soil conditions.
Two field experiments were carried out at El-Gemmeiza Agricultural Research Station, El-Gharbia Governorate during the two successive seasons of 2015 and 2016. These experiments were conducted to find out the proper irrigation interval and the effect of natural material which reduce the negative effect of water stress as well as their interaction on leaf chemical composition, growth, flowering habit, earliness parameters, seed cotton yield and its components and fiber quality of the Egyptian cotton cultivar Giza 86. A split plot design with three replicates was used in both seasons, where the main plots were assigned to three irrigation intervals (15, 30 and 45 days) and the sub-plots contained natural materials (without, glycine betaine (600 ppm), potassium citrate (3g/l) and salsalic acid (200 ppm) The important results could be summarized as follows: Irrigating intervals gave significant effect on l e a f total chlorophyll, carotenoids, phenols and proline content at 114 days, when irrigated every 45 d a ys followed by irrigated every 30 and 15 day in a descending order. Irrigation every 15 days significantly increased plant height at harvest, number of fruiting branches/plant, number of flowers/plant, boll weight and decreased setting and earliness percentages in both seasons as compared with the other two irrigation intervals (every 30 and 45 days). However, the higher number of open bolls/plant and seed cotton yield / fed were obtained from plants which irrigated every 30 days. Irrigation intervals had insignificant effect on seed index and significant effect on lint % in both seasons. The highest value of lint % was resulted from irrigated plants every 45 days. Spraying with natural materials significantly affected leaf total chlorophyll, phenols and proline content, in favor of spraying potassium citrate and significantly affected leaf carotenoids content at, in favor of spraying salsalic acidSpraying with natural materials significantly affected boll weight and number of open bolls/plant in both seasons in favor of spraying glycine betaine and potassium citrate. Application of salsalic acid or glycine betaine gave significant increase in lint % and insignificant effect on seed index in both seasons. Spraying cotton plants with glycine betaine lead to a significant increase in seed cotton yield per fed. Untreated Plants caused a significant increase in plant height at harvest and number of fruiting branches/plant in both seasons as compared with the plants which received glycine betaine, potassium citrate and salsalic acid. Concerning the interaction between irrigation intervals and natural materials, there is a significant interaction effect with regard to l e a f total chlorophyll, carotenoids, phenols and proline contents, in favor of irrigated cotton plants every 45 days and spraying with potassium citrate for l e a f total chlorophyll, phenols and proline contents and in favor of irrigated cotton plants every 45 days and spraying with salsalic acid for l e a f carotenoids content. Irrigation every 30...
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