scholarly journals Effects on the growth of carrots (Daucus carota L.), cabbage (Brassica oleracea var. capitata L.) and onion (Allium cepa L.) of restricting the ability of the plants to intercept resources

2000 ◽  
Vol 51 (344) ◽  
pp. 605-615 ◽  
Author(s):  
L. Peach
Keyword(s):  
Brassica Oleracea ◽  
Allium Cepa ◽  
Daucus Carota ◽  
Daucus Carota L ◽  
Allium Cepa L

Zone tillage systems for onion and carrot production on muck soils

2004 ◽  
Vol 84 (4) ◽  
pp. 1167-1169 ◽  
Author(s):  
C. J. Swanton ◽  
S. Janse ◽  
K. Chandler ◽  
B. D. Booth
Keyword(s):  
Key Words ◽  
Allium Cepa ◽  
Daucus Carota ◽  
Conventional Tillage ◽  
Viable Alternative ◽  
Reduced Tillage ◽  
Tillage Systems ◽  
Daucus Carota L ◽  
Allium Cepa L

This study examined whether zone tillage was a viable alternative to conventional tillage for carrot [Daucus carota L. var. sativus (Hoffm.) Arcang.] and onion (Allium cepa L.) production on muck soils. Total and marketable yields under zone tillage were e qual to (carrot) or greater than (onion) yields under conventional tillage. Carrot yields did not differ between raised and flat bed treatments. Key words: Reduced tillage, conventional tillage, Daucus carota L. var. sativus (Hoffm.) Arcang.); Allium cepa L.

Consistency of long-term marketable yield of carrot and onion cultivars in muck (organic) soil in relation to seasonal weather

2010 ◽  
Vol 90 (5) ◽  
pp. 755-765 ◽  
Author(s):  
M. T. Tesfaendrias ◽  
M. R. McDonald ◽  
J. Warland
Keyword(s):  
Allium Cepa ◽  
Daucus Carota ◽  
Organic Soil ◽  
Data Sets ◽  
Fresh Market ◽  
Marketable Yield ◽  
Daucus Carota L ◽  
Weather Patterns ◽  
The Mean

To identify carrot and onion cultivars that provide consistent marketable yields, we tracked the yields of five fresh market carrot [(Daucus carota L. subsp. sativus (Hoffm.) Arcang.] and six onion (Allium cepa L.) cultivars for at least 13 yr. Relationships between long-term weather variables and marketable yields were also investigated. The effects of cultivar, year and cultivar × year interactions on yield of carrots and onions were assessed. Cultivar and year had significant effects on carrot and onion yields, while the interaction was significant in only one of four data sets of carrot yield. Carrot cv. Cellobunch (95.4 t ha–1) and onion cv. Corona (74.1 t ha–1) had the highest mean marketable yields over the years studied. There was a slight positive correlation between mean yield of the assessed carrots and maximum temperatures in September (r = 0.44). Mean carrot yield was also somewhat negatively correlated with total rainfall in July (r = –0.43) and with number of days with rain in August (r = –0.43) and September (r = –0.44). Most onion cultivars showed stronger relationships between marketable yield and various weather patterns. Marketable yield of onions increased with an increase in the number of days with rainfall in June (r = 0.57). The mean marketable yield of the six onion cultivars decreased in relation to temperatures ≥30°C in June (r = –0.55) and August (r = –0.53). The mean yield of all the onions in the trials was negatively correlated (r = –0.78) with growing degree days (base 5°C, May to August). The results indicated that the data from long-term cultivar trials can be used to identify cultivars that yield well despite seasonal variations in weather. Key words: Daucus carota, Allium cepa, temperature, rainfall

scholarly journals Change in the Length of the Vegetation Period of Tomato (Solanum lycopersicum L.), White Cabbage (Brassica oleracea L. var. capitata) and Carrot (Daucus carota L.) Due to Climate Change in Slovakia

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1110 ◽  
Author(s):  
Ján Čimo ◽  
Elena Aydın ◽  
Karol Šinka ◽  
Andrej Tárník ◽  
Vladimír Kišš ◽  
...  
Keyword(s):  
Climate Change ◽  
Brassica Oleracea ◽  
Solanum Lycopersicum ◽  
Daucus Carota ◽  
Crop Production ◽  
Arable Land ◽  
Vegetation Period ◽  
Daucus Carota L ◽  
Solanum Lycopersicum L ◽  
Brassica Oleracea L

Climate change is affecting all sectors of human activities worldwide, including crop production. The aim of the paper was to evaluate the average daily air temperatures measured at one hundred meteorological stations across Slovakia in 1961–2010 and calculate the maximum length of the vegetation period for Solanum lycopersicum L., Brassica oleracea L. var. capitata and Daucus carota L. Future trends predictions of the temporal and spatial development across the duration of the vegetation period in Slovakia were elaborated for decades 2011–2020, 2041–2050, 2071–2080 and 2091–2100. Our results show that there was an earlier start to the vegetation period in spring and a later termination in autumn for past 30 years. There is a predicted trend of prolongation of the maximum duration of the vegetation period up to 20 days (Solanum lycopersicum L., Brassica oleracea L. var. capitata) and 15 days (Daucus carota L.) in comparison with the refence decade 2001–2010. The maximum vegetation period duration will extend from the south of Slovakia towards the north of the country. The predicted potential increase in crop vegetation periods will be limited by other constraints such as the availability of arable land and soil water availability.

scholarly journals Polyphasic characterization of Burkholderia gladioli isolated from onion and evaluation of its potential pathogenicity for other crops

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
María Serret-López ◽  
Sergio Aranda-Ocampo ◽  
David Espinosa-Victoria ◽  
Luis Enrique Ortiz-Martínez ◽  
Karina Ramírez-Razo
Keyword(s):  
Phaseolus Vulgaris ◽  
Brassica Oleracea ◽  
Allium Cepa ◽  
Daucus Carota ◽  
Agaricus Bisporus ◽  
Burkholderia Gladioli ◽  
Polyphasic Characterization ◽  
Potential Pathogenicity

Los individuos del género <em>Burkholderia</em>, <em>sensu lato</em>, se caracterizan por colonizar diversos nichos ecológicos. Esta investigación tuvo como objetivos caracterizar morfológica, fisiológica, bioquímica y molecularmente a <em>Burkholderia gladioli</em>, aislada de bulbos podridos de cebolla blanca (<em>Allium cepa</em>), y determinar su potencial como patógeno de otras especies vegetales. <em>Burkholderia gladioli</em> promovió, igualmente, la pudrición blanda en bulbos de cebolla morada (<em>A. cepa</em>), tallos de puerro (<em>A. ampeloprasum</em>), inflorescencias de brócoli (<em>Brassica oleracea</em>), cladodios de nopal (<em>Opuntia indica</em>), raíces de zanahoria (<em>Daucus carota</em>) y esporocarpos de champiñón (<em>Agaricus bisporus</em>). <em>Burkholderia gladioli</em> colonizó plantas de frijol (<em>Phaseolus vulgaris</em>) en invernadero y mostró resistencia natural <em>in vitro</em> a productos a base de cobre: cuprimicin agrícola, cuprimicin 500, phyton, oxicloruro de cobre; antibióticos: bactrol, bactriomicin agrícola, kasumin, final bacter, quartz y biológicos: serenade polvo, fungifree y bacterbest. Este estudio reporta por primera vez la caracterización polifásica de <em>B. gladioli</em> en México. Este aislado bacteriano creció a pH 4.0 y 42 °C, lo que podría conferirle habilidad competitiva en suelos ácidos y condiciones semiáridas. Se demostró que tiene un amplio rango de hospederos en condiciones postcosecha, además de ser resistente a diferentes productos usados en campo para el control de fitopatógenos.

scholarly journals Efeito de espécies vegetais em bordadura em cebola sobre a densidade populacional de tripes e sirfídeos predadores

2003 ◽  
Vol 21 (4) ◽  
pp. 731-733 ◽  
Author(s):  
Paulo Antonio de Souza Gonçalves ◽  
Carlos Roberto Sousa e Silva
Keyword(s):  
Zea Mays ◽  
Daucus Carota ◽  
Raphanus Sativus ◽  
Zea Mays L ◽  
Thrips Tabaci ◽  
Eruca Sativa ◽  
Daucus Carota L ◽  
Allium Cepa L ◽  
Raphanus Sativus L ◽  
Fagopyrum Esculentum Moench

Analisou-se a relação entre o efeito do plantio de diferentes espécies vegetais, em bordadura, na cultura da cebola, Allium cepa L, na incidência de Thrips tabaci Lind. e sirfídeos predadores, Toxomerus spp. O experimento foi conduzido na Epagri, EE de Ituporanga, de agosto a dezembro de 1998. Os tratamentos foram cebola em monocultivo; cebola + trigo mourisco (Fagopyrum esculentum Moench); cebola + nabo forrageiro (Raphanus sativus L. var. oleiferus Metzg.); cebola + cenoura (Daucus carota L., cv. Nantes e cv. Brasília); cebola + milho (Zea mays L.); cebola + rúcula (Eruca sativa L.) + vegetação espontânea. O plantio de diferentes espécies vegetais em bordadura não provocou diferenças significativas na incidência de tripes e sirfídeos predadores. A produtividade comercial de bulbos de cebola foi similar em sistema de monocultivo e diversificado, sugerindo ser possível adotar tais sistemas sem perdas em rendimento.

scholarly journals Producción de plántulas de hortalizas con Azospirillum sp. y aspersión foliar de miel de abeja

2017 ◽  
Vol 7 (1) ◽  
pp. 59
Author(s):  
Wendy Cruz Romero ◽  
Juan Manuel Barrios Díaz ◽  
Maria De las Nieves Rodríguez Mendoza ◽  
David Espinoza Victoria
Keyword(s):  
Brassica Oleracea ◽  
Solanum Lycopersicum ◽  
Allium Cepa ◽  
Lactuca Sativa ◽  
Peat Moss ◽  
Solanum Lycopersicum L ◽  
Lactuca Sativa L ◽  
Allium Cepa L

Con el objetivo de proponer biotecnologías para la producción sustentable de almácigos de hortalizas, fueron evaluadas como alternativas de nutrición de plántulas de brócoli (Brassica oleracea var. Itálica), cebolla (Allium cepa L.), lechuga (Lactuca sativa L.) y tomate (Solanum lycopersicum L.), la inoculación con cepas 7A y AMRp10 de Azospirillum y la aspersión foliar de miel de abeja 2% (AFMA), determinando su efecto en la altura, área foliar, diámetro de tallo, peso seco, unidades SPAD y diámetro de bulbo (cebolla). El experimento se realizó bajo condiciones de invernadero empleando un diseño completamente al azar y utilizando como unidades experimentales almácigos comerciales con una mezcla de peat moss y perlita como sustrato. Los resultados indican que la aspersión foliar de miel de abeja 2% incrementó significativamente la altura (13%), área foliar (38%) y peso seco (30%) de las plántulas de brócoli, en las plántulas de lechuga la altura y área foliar fueron mayores que con A.AMRp10 en 18 y 98%, respectivamente, además, en las plántulas de tomate la altura aumentó 23 %, también con respecto a A.AMRp10. Por otra parte, con la inoculación de A.7A, en las plántulas de brócoli se incrementaron 7% las unidades SPAD respecto al tratamiento AFMA y 11% el diámetro de tallo en comparación con A.AMRp10, pero también el área foliar de las plántulas de tomate fue 52% mayor con respecto a A.AMRp10. En esta investigación, la inoculación con la cepa 7A de Azospirillum y la aspersión foliar de miel de abeja, demostraron que tienen efectos promotores del crecimiento vegetal, por lo tanto constituyen una alternativa promisoria y viable para la producción de plántulas de hortalizas.

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