Background: Cotton growing in Côte d’Ivoire faces a number of constraints, not least climate change, which is having an increasingly visible impact on production. In addition to the drop in cotton production, on...Background: Cotton growing in Côte d’Ivoire faces a number of constraints, not least climate change, which is having an increasingly visible impact on production. In addition to the drop in cotton production, one of the problems facing the Ivorian cotton industry is the low fibre yield at ginning factories and the poor quality of the fibre sold on the international market. The causes identified include the poor quality of seed cotton purchased on local markets, particularly the level of impurities. This study was therefore carried out to determine the influence of the waste contained in the seed cotton ginned in factories on the fibre yield and the technological characteristics of cotton fibre in Côte d’Ivoire. The work consisted in carrying out ginning trials in ginning factories to assess fibre yield in relation to the level of impurities in the cotton harvested. The fibre samples taken from the bales during the ginning trials were analysed on an HVI 1000/1000 integrated measurement chain. The data collected were used to perform a multivariate analysis (PCA) and simple regressions. Results: The results showed that the waste rate increased from 2.96% to 5.33% from the youngest production generations to the oldest. Principal component analysis revealed correlations between parameters collected in factories. The level of impurity was negatively correlated with fifer ginning yield, fibre length (y = −0.4408x + 28.991;R2 = 0.3956;p = 0.005) and length uniformity (y = −0.5963x + 81.078;R2 = 0.5185;p = 0.001). It is positively correlated with short fibre content (y = 1.8376x + 8.8186;R2 = 0.5833;p = 0.000) and trash in baled fibres (y = 4.8515x + 25.759;R2 = 0.4054;p = 0.004). Conclusion: Impurities in seed cotton contribute to reducing the fibre yield at ginning in factories and degrading the fibre characteristics by reducing fibre length and uniformity on the one hand, and by increasing short fibre rates on the other. This contributes to reducing the market value of cotton fibre.展开更多
Cotton cultivation plays a major socio-economic role in the north and centre of Côte d’Ivoire, where it is the driving force behind the agricultural development of rural populations and contributes to the fight ...Cotton cultivation plays a major socio-economic role in the north and centre of Côte d’Ivoire, where it is the driving force behind the agricultural development of rural populations and contributes to the fight against poverty. In recent years, the crop has faced huge problems, including falling production and a deterioration in fibre quality. To remedy this, research has proposed cotton varieties of the species Gossypium hirsutum, which were popularised during the 2016-2020 period. This study was carried out to assess the fibre technological performance of these varieties in the growing areas. Its objective was to assess the technological characteristics of the fibre of varieties Y331 BLT, Gouassou Fus1 and Sicama Vir1 in the agro-ecological zones of cotton growing in Côte d’Ivoire. To do this, the varieties were grown at the observation posts in Séguéla, Korhogo and Nambingué, three localities that represent the southern, central and northern cotton-growing areas in Côte d’Ivoire, respectively. The seed cotton harvested on the experimental plots was ginned using a 10-saw gin. The fibres obtained were analysed on an HVI 1000/1000 integrated measurement chain. The results show that the technological characteristics of the fibre are likely to vary according to the variety grown or the locality of production. Fibre yields vary from 41.97% to 43.98% depending on the variety. However, the varieties compared in the different cotton-growing areas behave in much the same way in terms of the fibre’s technological characteristics. Each variety can therefore be grown in these zones and produce fibre of good technological quality, provided that the recommended agronomic and post-harvest practices are followed. The greatest variations are due to the influence of agro-ecological conditions on fibre characteristics, which are highly dependent on the locality where the cotton is grown. The micronaire index (4.24), length (29.43 mm) and tenacity (32.66 g/tex) are higher and better in Séguéla area, while the yellowness index is lower (8.32) and better in Nambingué zone. There could therefore be terroir cotton whose fibre could be marketed differently because of a particular good technological parameter. For example, fibres from the south of the cotton-growing zone could be more prized than those from other localities because of their better silk length, good tenacity and low yellowness index.展开更多
文摘Background: Cotton growing in Côte d’Ivoire faces a number of constraints, not least climate change, which is having an increasingly visible impact on production. In addition to the drop in cotton production, one of the problems facing the Ivorian cotton industry is the low fibre yield at ginning factories and the poor quality of the fibre sold on the international market. The causes identified include the poor quality of seed cotton purchased on local markets, particularly the level of impurities. This study was therefore carried out to determine the influence of the waste contained in the seed cotton ginned in factories on the fibre yield and the technological characteristics of cotton fibre in Côte d’Ivoire. The work consisted in carrying out ginning trials in ginning factories to assess fibre yield in relation to the level of impurities in the cotton harvested. The fibre samples taken from the bales during the ginning trials were analysed on an HVI 1000/1000 integrated measurement chain. The data collected were used to perform a multivariate analysis (PCA) and simple regressions. Results: The results showed that the waste rate increased from 2.96% to 5.33% from the youngest production generations to the oldest. Principal component analysis revealed correlations between parameters collected in factories. The level of impurity was negatively correlated with fifer ginning yield, fibre length (y = −0.4408x + 28.991;R2 = 0.3956;p = 0.005) and length uniformity (y = −0.5963x + 81.078;R2 = 0.5185;p = 0.001). It is positively correlated with short fibre content (y = 1.8376x + 8.8186;R2 = 0.5833;p = 0.000) and trash in baled fibres (y = 4.8515x + 25.759;R2 = 0.4054;p = 0.004). Conclusion: Impurities in seed cotton contribute to reducing the fibre yield at ginning in factories and degrading the fibre characteristics by reducing fibre length and uniformity on the one hand, and by increasing short fibre rates on the other. This contributes to reducing the market value of cotton fibre.
文摘Cotton cultivation plays a major socio-economic role in the north and centre of Côte d’Ivoire, where it is the driving force behind the agricultural development of rural populations and contributes to the fight against poverty. In recent years, the crop has faced huge problems, including falling production and a deterioration in fibre quality. To remedy this, research has proposed cotton varieties of the species Gossypium hirsutum, which were popularised during the 2016-2020 period. This study was carried out to assess the fibre technological performance of these varieties in the growing areas. Its objective was to assess the technological characteristics of the fibre of varieties Y331 BLT, Gouassou Fus1 and Sicama Vir1 in the agro-ecological zones of cotton growing in Côte d’Ivoire. To do this, the varieties were grown at the observation posts in Séguéla, Korhogo and Nambingué, three localities that represent the southern, central and northern cotton-growing areas in Côte d’Ivoire, respectively. The seed cotton harvested on the experimental plots was ginned using a 10-saw gin. The fibres obtained were analysed on an HVI 1000/1000 integrated measurement chain. The results show that the technological characteristics of the fibre are likely to vary according to the variety grown or the locality of production. Fibre yields vary from 41.97% to 43.98% depending on the variety. However, the varieties compared in the different cotton-growing areas behave in much the same way in terms of the fibre’s technological characteristics. Each variety can therefore be grown in these zones and produce fibre of good technological quality, provided that the recommended agronomic and post-harvest practices are followed. The greatest variations are due to the influence of agro-ecological conditions on fibre characteristics, which are highly dependent on the locality where the cotton is grown. The micronaire index (4.24), length (29.43 mm) and tenacity (32.66 g/tex) are higher and better in Séguéla area, while the yellowness index is lower (8.32) and better in Nambingué zone. There could therefore be terroir cotton whose fibre could be marketed differently because of a particular good technological parameter. For example, fibres from the south of the cotton-growing zone could be more prized than those from other localities because of their better silk length, good tenacity and low yellowness index.
