A field trial was carried out in Ferk6 2 Sugar mill located in northern Ivory Coast, in order to study sugarcane growth and yield response to deficit irrigation imposed over the yield formation stage. The crop used wa...A field trial was carried out in Ferk6 2 Sugar mill located in northern Ivory Coast, in order to study sugarcane growth and yield response to deficit irrigation imposed over the yield formation stage. The crop used was a first ratoon Co 957, a non flowering late season sugarcane variety. The experiment was completely randomized following a one-factor design with 4 water deficit treatments in 3 replicates. It came out that the optimum water deficit treatment reached 20%, i.e., 80% of crop water requirements were satisfied through irrigation. That treatment gave 7.9 kg cane/m3 or 0.98 kg sugar/m3 as irrigation water use efficiency. Relatively low crop growth rates （0.2-0.4 cm/day） as well as low cane yields （24.5-78.4 t/ha） were obtained as a result of an intensive and persistent dry season occurred over the yield formation stage. In line of prevailing climatic conditions, cane juice quality measured was particularly high on Co 957 which used to be a moderately performing variety in Ferk6 2 sugar mill.展开更多
We evaluated several organic fertilizers associated or not to mineral fertilizers, in the cane yield and theoretical sugarcane brandy in plant cane. The experimental design was randomized blocks, with nine treatments ...We evaluated several organic fertilizers associated or not to mineral fertilizers, in the cane yield and theoretical sugarcane brandy in plant cane. The experimental design was randomized blocks, with nine treatments and four replications, constituted of： TI： Liming （ 1 ） ＋ reactive rock phosphate （2） ＋ chemical fertilizer （3）; T2：2 ＋ 3; T3：1 ＋ 3 （control）; T4：1 ＋ 2 ＋ 3 ＋ cattle manure （4）; T5： 1 ＋ 2 ＋ 4; T6：1 ＋ 2 ＋ 3 ＋ chicken manure （5）; T7：1 ＋ 2 ＋ 5; T8：1 ＋ 2 ＋ 3 ＋ cane bagasse （6）; T9：1 ＋ 2 ＋ 6. It was applied the fertilizers in the following doses： cattle manure, 30 t hal; chicken manure, 3.5 t hal; cane bagasse, 24 t ha-1; reactive rock phosphate, 400 kg ha-1 and 120 kg ha-1 of K20 and P205, in the planting furrow. The limestone was distributed in the dose of 2.5 t ha-1 The variety was used SP 79-1011. The cattle manure substituted the chemical fertilization of plant cane. The cane bagasse, when used as organic source should always be complemented with the chemical fertilization; there were no effect of treatments in the principal technological characteristics of the cane.展开更多
Sugarcane advanced variety trials are planted across several locations and harvested for several crop-years to determine genotype by environment interaction and yield stability. Previous studies describe methods for s...Sugarcane advanced variety trials are planted across several locations and harvested for several crop-years to determine genotype by environment interaction and yield stability. Previous studies describe methods for simultaneous screening for yield and stability but did not use parametric statistical tests for comparing genotypes. The objective of this study was to describe a parametric statistical method for simultaneous screening of sugarcane genotypes for yield and stability. Data from 26 crops were collected from trials established at five locations and harvested in the plant, first, second, third and fourth ratoon crops. The mixed procedure of SAS was used for data analysis. The intercept and slope were used to represent yield and stability, respectively. There were significant （P 〈 0.05） differences in yield and stability among the genotypes. Test genotypes were classified into groups of genotypes that produced high yield, or high stability or both. The method provides fast statistical tests for simultaneous screening for yield and stability. The method was also used to compare two genotypes, an application for variety choice at time of release.展开更多
文摘A field trial was carried out in Ferk6 2 Sugar mill located in northern Ivory Coast, in order to study sugarcane growth and yield response to deficit irrigation imposed over the yield formation stage. The crop used was a first ratoon Co 957, a non flowering late season sugarcane variety. The experiment was completely randomized following a one-factor design with 4 water deficit treatments in 3 replicates. It came out that the optimum water deficit treatment reached 20%, i.e., 80% of crop water requirements were satisfied through irrigation. That treatment gave 7.9 kg cane/m3 or 0.98 kg sugar/m3 as irrigation water use efficiency. Relatively low crop growth rates （0.2-0.4 cm/day） as well as low cane yields （24.5-78.4 t/ha） were obtained as a result of an intensive and persistent dry season occurred over the yield formation stage. In line of prevailing climatic conditions, cane juice quality measured was particularly high on Co 957 which used to be a moderately performing variety in Ferk6 2 sugar mill.
文摘We evaluated several organic fertilizers associated or not to mineral fertilizers, in the cane yield and theoretical sugarcane brandy in plant cane. The experimental design was randomized blocks, with nine treatments and four replications, constituted of： TI： Liming （ 1 ） ＋ reactive rock phosphate （2） ＋ chemical fertilizer （3）; T2：2 ＋ 3; T3：1 ＋ 3 （control）; T4：1 ＋ 2 ＋ 3 ＋ cattle manure （4）; T5： 1 ＋ 2 ＋ 4; T6：1 ＋ 2 ＋ 3 ＋ chicken manure （5）; T7：1 ＋ 2 ＋ 5; T8：1 ＋ 2 ＋ 3 ＋ cane bagasse （6）; T9：1 ＋ 2 ＋ 6. It was applied the fertilizers in the following doses： cattle manure, 30 t hal; chicken manure, 3.5 t hal; cane bagasse, 24 t ha-1; reactive rock phosphate, 400 kg ha-1 and 120 kg ha-1 of K20 and P205, in the planting furrow. The limestone was distributed in the dose of 2.5 t ha-1 The variety was used SP 79-1011. The cattle manure substituted the chemical fertilization of plant cane. The cane bagasse, when used as organic source should always be complemented with the chemical fertilization; there were no effect of treatments in the principal technological characteristics of the cane.
文摘Sugarcane advanced variety trials are planted across several locations and harvested for several crop-years to determine genotype by environment interaction and yield stability. Previous studies describe methods for simultaneous screening for yield and stability but did not use parametric statistical tests for comparing genotypes. The objective of this study was to describe a parametric statistical method for simultaneous screening of sugarcane genotypes for yield and stability. Data from 26 crops were collected from trials established at five locations and harvested in the plant, first, second, third and fourth ratoon crops. The mixed procedure of SAS was used for data analysis. The intercept and slope were used to represent yield and stability, respectively. There were significant （P 〈 0.05） differences in yield and stability among the genotypes. Test genotypes were classified into groups of genotypes that produced high yield, or high stability or both. The method provides fast statistical tests for simultaneous screening for yield and stability. The method was also used to compare two genotypes, an application for variety choice at time of release.
