Impact of Urea as Nitrogen Source and Pix as Growth Regulator on Cotton (Gossypium hirsutum L)

Abstract

In order to study the effects of the application of various amounts of nitrogen fertilizers and Pix 35% growth regulator on the morphological features of the Sahel cultivar of cotton (Gossypium hirsutum L.), and on the unginned cotton yield of this cultivar, an experiment was carried out in the factorial design in the randomized complete block format with three replications at the Bayekola Agronomical Research Station in 2009. The factors studied included the amounts of nitrogen fertilizers and of the cotton growth regulator Pix 35% used in the experiment. Results obtained showed that the minimum plant height was obtained in the control treatment (72.93 cm), and that plant height increased with nitrogen application and reached its maximum (77.59 cm) when 225 Kg.h of nitrogen was used. The analysis of the variance of the data indicated that the effects of applying various levels of Pix were very significantly different, so that the greatest plant height was observed in the Pix control treatment (90.94 cm), and it significantly decreased by Pix application and reached 65 cm when 300 g.h of Pix was applied (which was an almost 40% reduction). Furthermore, when nitrogen fertilizers were applied, the unginned cotton yield significantly went up, and this increase in yield continued up to the level of using 150 Kg. h nitrogen; however, when the level of nitrogen application reached 225 Kg.h, the yield started to go down. As a whole, the lowest yield was obtained when nitrogen was not applied (which was the control with a yield of 1469 Kg of unginned cotton per hectare), and the maximum yield (2825 Kg.h of unginned cotton per hectare) was achieved when 150 Kg of nitrogen per hectare was used _ i.e., the unginned cotton yield went up by 14% when 150 Kg of nitrogen per hectare was applied. In our study, it was observed that Pix did not have much influence on increasing yield: the minimum yield (2529 Kg of unginned cotton per hectare) was observed in the treatment of applying 100 g. h of Pix, and the maximum yield (2669 Kg of unginned cotton per hectare) by using 200 gh of Pix. Comparison of the interaction effects of the level of Pix and nitrogen application indicated that, among all the treatments, the maximum yield of unginned cotton (3010 K.h) was achieved when 150 Kg. h of nitrogen and 200 g.h Pix were applied. These results also showed that in the treatments of using 150 Kg nitrogen per hectare, and applying 150 Kg. nitrogen plus 300 g Pix per hectare also, high yield potentials (close to 3 tons per hectare) were created. The minimum yield of unginned cotton (2230 Kg.h) belonged to the treatment of using 200 grams of Pix per hectare.

Comparative Effect of Different NPK Fertilizers on Growth of Cotton (Gossypium hirsutum L.) in Alkaline Calcareous Soil

“…Treatments i.e., T2, T3, T4 also showed significant improvement in these parameters compared to the control but to a lesser extent compared to T5. Similarly, the findings of our investigation are in line with the findings of previous studies Choudhary et al, 2018;Zaidi et al, 2020) which reported that the application of NPK fertilizers enhanced the growth and yield of cotton. These studies also emphasized the positive role of NPK fertilizers in improving soil fertility and crop productivity under alkaline soil conditions.…”

The Influence of Plant Growth Regulators on Morphological Indexes and Performance of Brassica juncea L. in the Forest-Steppe of Ukraine

“…Foliar spray of nutrients and plant growth regulators is the fastest way to boost crop growth because the nutrients are available to plants at the initial and critical stages [20]. Foliar application of plant growth regulators could increase leaf area index, dry matter accumulation, delay root senescence and increase crop yield [25,26].…”

Optimizing Crop Performance: Foliar Strategies For Improved Resilience Under Stressful Environments

“…The experimental design incorporates various treatments, including 19:19:19 NPK, Brassinosteroid, and Salicylic Acid, both individually and in consortia. The study aims to elucidate the impact of these treatments on parameters such as Crop Growth Rate (CGR), Leaf Area Index (LAI), Relative Water Content (RWC), and SPAD Chlorophyll Meter Readings (SCMR) post-flowering (Esmaeil et al, 2012). The outcomes of this research are expected not only to contribute valuable insights into optimizing finger millet management practices under water stress but also to provide a foundation for future investigations into the application of foliar strategies across diverse crops and under different stress conditions.…”