Instituto de Ciências Agrárias – CRP
URI permanente desta comunidadehttps://locus.ufv.br/handle/123456789/11787
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Item Carrot yield and recovery efficiency of nitrogen, phosphorus and potassium(Revista Caatinga, 2016-10) Assunção, Natália Silva; Clemente, Junia Maria; Aquino, Leonardo Angelo De; Dezordi, Luciel Rauni; Santos, Luiz Paulo Dornelas DosThe objective of this work was to evaluate the carrot crop recovery efficiency of nitrogen, phosphorus and potassium from fertilizers. Two experiments were conducted in an experimental area in Rio Paranaiba - MG. The cultivar ("Juliana‟) was sown during the summer period and the cultivar "Nayarit‟ during the winter period. In both experiments, the treatments consisted of six fertilization combinations of N, P2O, K2O (kg ha-1): fertilization without N (0-500-450), without P (100-0-450), without K (100-500-0), standard (100-500-450), higher than standard (100-700-600) and lower than standard (100-300-300). The harvest was carried out when most of the roots presented commercial standard well accepted by the consumers. The fresh and dry matter of roots and leaves were quantified, and the yield was calculated based on the fresh matter. The analysis of N, P and K contents in leaves and roots were carried out by harvest time, and the nutrients absorption and exportation were determined based on these contents and on the dry matter of roots and leaves. N, P and K omissions reduced the yield of the cultivar "Juliana‟. For the cultivar "Nayarit‟, only P omission reduced and P and K fertilizations increased the yield. The cultivar "Nayarity‟, which is more productive than "Juliana", absorbed more quantities of N, P and K. Carrot recovery efficiency of nitrogen, phosphorus and potassium is low.Item Pochonia chlamydosporia controls Meloidogyne incognita on carrot(Australasian Plant Pathology, 2014-07) Bontempo, A. F.; Fernandes, R. H.; Lopes, J.; Freitas, L. G.; Lopes, E. A.The fungus Pochonia chlamydosporia var. chlamydosporia isolate Pc-10 (Pc-10) presents great potential for the management of root-knot nematodes on vegetable crops. However, there is no information about the use of Pc-10 on carrot. Thus, we evaluated in this study the effect of Pc-10 incorporated into the soil (PCI) or applied to the surface of the beds (PCS) on control of Meloidogyne incognita on carrot under field conditions, in comparison to an untreated control and the bionematicides Paecilomyces lilacinus + Bacillus subtilis (PLBS), mix of nematophagous fungi and Bacillus sp. (NFB) and P. lilacinus (PL). PCI increased the total and marketable production of carrot roots by 25.35 and 55.03 %, respectively. The production of unmarketable roots was reduced by about 50 % in plots treated with PCI, PCS and PLBS. All bionematicides reduced the number of unmarketable roots with galls, but only PCI reduced the reproduction factor of the nematode. The incorporation of Pc-10 in the soil of the beds controls M. incognita and improves carrot quality and yield.Item Cellulose microfibrillated suspension of carrots obtained by mechanical defibrillation and their application in edible starch films(Industrial Crops and Products, 2016-10-30) Guimarães, Isabela Costa; Reis, Kelen Cristina dos; Menezes, Evandro Galvão Tavares; Rodrigues, Ariel Costa; Silva, Thaís Ferreira da; Oliveira, Isadora Rebouças Nolasco de; Vilas Boas, Eduardo Valério de BarrosA suspension of microfibrillated cellulose (MFC) of carrot was obtained by mechanical defibrillation and it was applied as reinforcement in starch edible films. It was investigated the effect of different amounts of carrots and different numbers of passages through the defibrillator on the resulting suspensions of carrot MFC films. It was also investigated the physical, mechanical, morphological and structural properties of films from corn starch reinforced with suspensions of carrot MFC as a function of the concentration of carrot and the number of passages through the mechanical defibrillator. The carrot concentration and number of passages through the mechanical defibrillator affected the final particle size, film color and thickness, water vapor permeability (WVP), and tensile strength (TS) of the suspensions of carrot MFC films. Starch films reinforced with suspensions of carrot MFC had a lower WVP and higher TS than starch films. Scanning electron microscopy (SEM) shows that the largest number of passages through the mechanical defibrillator results in less aggregation of MFC, making it possible to obtain a good interaction between the suspensions of carrot MFC and starch matrix.Item First report of leafminer Lyriomyza spp. in Daucus carota in Brazil(Brazilian Journal of Biology, 2017-08-31) Fernandes, F. L.; Costa, N. C. R.; Pereira, R. C.; Santos, A. L. Dos; Ribeiro, R. C.; Fernandes, M. E. De S.