Produção e aceitabilidade de cenoura sob cultivo orgânico no inverno e no verão

Assunção

et al. 2015

Rev. Bras. Ciênc. Solo

Farmers must carefully choose the cultivar to be grown for a successful carrot crop. The yield potential of the cultivar may influence nutrient demand and should be known to plan for fertilization application. The aim of this study was to evaluate the cultivar effect on carrot yield and on the nutrient content and quantities allocated to leaves and roots. Three experiments were set up in two crop seasons in Rio Paranaíba, MG, Brazil. In the first season, typical summer, 10 summer cultivars were sown. In the second season, summer-winter (transition), two experiments were set up, one with summer cultivars and the other with winter cultivars. The treatments consisted of the carrot cultivars distributed in randomized blocks with four replications. Fresh and dry matter of the roots and leaves was quantified. Yield was calculated based on fresh matter of the roots. The nutrient content in leaves and roots was determined at the time of harvest. These contents and the dry matter production of roots and leaves were used to calculate nutrient uptake and export. The greatest average for total and commercial yield occurred in the crop under summer conditions. Extraction of N and K for most of the cultivars in the three experiments went beyond the amounts applied through fertilizers. Thus, there was contribution of nutrients from the soil to obtain the yields observed. However, the amount of P taken up was considerably less than that applied. This implies that soil P fertility will increase after cropping. The crop season and the cultivars influenced yield, nutrient content in the leaves and roots, and extraction and export of nutrients by the carrot crop.

Section: Resultsmentioning

confidence: 99%

Nutrient Demand by the Carrot Crop Is Influenced by the Cultivar

Assunção

et al. 2015

Rev. Bras. Ciênc. Solo

“…The means Means followed by the same letter do not differ statistically (uppercase in the row and lowercase in the column) using the Scott-Knott test at 5% probability. of total soluble solids obtained in the present study are above the range of 6.5 to 7.5º Brix, which is recommended for harvest and consumption (Paulus et al, 2012). Soluble solids content is directly related to the taste and sweetness of plant products.…”

Section: Resultsmentioning

confidence: 45%

“…For the Shin Kuroda cultivar, which belongs to the Kuronan group, the average soluble solids content observed by Paulus et al (2012) was 9.5 ºBrix, with the highest averages observed for carrots grown in the winter. In Mossoró, Grangeiro et al (2012) report an average of 7.62 -8.90 ºBrix for the Brasília cultivar.…”

Section: Cultivarsmentioning

confidence: 96%

Effect of planting date on postharvest quality of roots of different carrot cultivars grown in the Brazilian semiarid region

et al. 2020

Effect of planting date on postharvest quality of roots of different carrot cultivars grown in the Brazilian semiarid regionIn regions with high temperatures, carrot cultivation is difficult because high temperatures tend to reduce the size and pigmentation of the root and, consequently, the yield and quality of the product. However, with the advent of summer cultivars, the cultivation of quality carrots under high temperatures has been viable. The aim of this work was to evaluate the postharvest quality of ten carrot cultivars as a function of different planting dates. The experiments were carried out on the Rafael Fernandes Experimental Farm of the Universidade Federal Rural do Semi-Árido (UFERSA). Four experiments were carried out in May, June, July and August 2017. The experimental design was a randomized block with ten treatments and four replications. The following was evaluated: white halo percentage, soluble solids content, total soluble sugars, total titratable acidity, soluble solids/titratable acidity ratio and beta-carotene content. The interaction between the carrot cultivars and planting date had a significant influence on the postharvest quality of carrot roots. The hybrid cultivars had an overall better post-harvest quality. The carrots sown in July had better quality traits; however, they were more affected by the "white halo" disorder.

“…For the state of Paraná, Paulus et al (2012) obtained a total yield of 20 t ha -1 for Brasília and 18.3 t ha -1 for Kuronan.…”

Section: Resultsmentioning

confidence: 99%

Effect of the planting season on carrot cultivars growth and yield in the brazilian semiarid region

et al. 2021

In regions with high temperatures, carrot cultivation is impracticable, as high temperatures tend to reduce yield and quality of the product. However, with the advent of summer cultivars, carrot cultivation in these regions has become viable. The aim of this work was to evaluate the performance of ten carrot cultivars in different planting seasons. The experiments were carried out at the Rafael Fernandes Experimental Farm of the Federal Rural Semiarid University (UFERSA). The experiments were carried out in May, June, July and August of 2017. The experimental design was a randomized block with ten treatments and four repetitions. The characteristics that were evaluated were the root classification (long, average and short roots); commercial, non-commercial and total yield; dry plant weight and root fresh weight. Both the planting season and the cultivar played important roles in agronomic performance throughout the experimental period. In May and June, the highest average yields and plant growth were obtained (43 and 45 t ha-1 yield, respectively). Hybrid cultivars showed better performance than open-pollinated cultivars in terms of yield. The Brasília, BRS Planalto, and Kuronan varieties showed poor performance in all the evaluated characteristics.