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Previous issue date: 2015-08-07 / The lack of planting material has limited the expansion of the Peruvian carrot cultivation, therefore a better use of the seedlings in recommended. The aim of this work was to study the growth and survival of Peruvian carrot seedlings pre-propagated in paper containers filled with different substrates and study the effects of substrates on agro-economic productivity of plants from this species. The initial propagation of Peruvian carrot plants 'Amarela de Carandaí' was carried out with seedlings composed of shoots obtained from mother plants grown at the Medicinal Plant Garden in the previous harvest, that were maintained in a cold chamber and planted in containers made out of newpapers, filled with six substrates: T1 = 100% commercial substrate (C); T2 = 100% soil (S); T3 = 80% C + 20% S; T4 = 60% C + 40% S; T5 = 40% C + 60% S; and T6 = 20% C + 80% S. The six treatments were arranged in randomized block design with eight replications and experimental unit composed of 20 paper containers. The treatments applied in the field were the same six pre-planting treatments, arranged in a randomized block design, with four replications and experimental unit composed of 12 Peruvian carrot plants. At the initial propagation, the highest plant was 9.56 cm at 29 days after planting (DAP) and the survival rate was 35.37% at 36 DAP, when transplanting was conducted. The survival rate of the plants in the field was 67.65%. The highest values for plant height (34.09 cm), stem diameter (62.54 cm) and number of leaves (34.82) were observed in plants at 204 DAP. The average SPAD value was 36.34. The larger fresh leaf mass (9.54 t ha-1), shoots (13.53 t ha-1) and marketable roots (18.52 t ha-1) were obtained in T6 (treatment 6), and non-marketable roots (3.08 t ha-1) in T1 (treatment 1). The larger dry leaf mass (1.38 t ha-1), shoots (2.41 t ha-1), marketable roots (3.88 t ha-1) and non-marketable roots (0.67 t ha-1) were obtained in T6. Crown fresh and dry mass showed an overall average of 4,25 t ha-1 and 0.83 t ha-1, respectively. The largest marketable roots numbers (277,200 ha-1) were obtained in plants from T4 and T6 treatments, and non-marketable roots (415,800 ha-1) and shoots (1,059,300 ha-1) in T6. The largest marketable roots diameter (38.27 mm) and non-marketable roots (21.91 mm) were produced by plants from T1. The longer lengths of marketable roots were in plants from T6 (10.16 cm) and non-marketable roots in T1 (5.72 cm). An agro-economic assessment showed that the estimated costs ranged in R$ 24,896.31, between the highest cost (R$ 103,195.94) in T1 and the lowest cost (R$ 78,299.63) in T2. It was concluded that the greatest productivity of marketable roots (18.52 t ha-1) and the highest net income (R$ 27,841.12) were the Peruvian carrot 'Amarela de Carandaí' plants propagated in paper containers filled with the mixture of 20% commercial substrate and 80% of soil. / A falta de material de plantio tem limitado a expansão do cultivo da mandioquinha-salsa, sendo recomendado o melhor aproveitamento das mudas. Por isso, os objetivos deste trabalho foram o estudo do crescimento e da sobrevivência das mudas de mandioquinha-salsa pré-propagadas em recipientes de papel preenchidos com diferentes substratos e estudar os efeitos dos substratos na produtividade agroeconômica das plantas desta espécie. A propagação inicial das plantas da mandioquinha-salsa 'Amarela de Carandaí' foi realizada com mudas formadas por rebentos, obtidos de plantas matrizes cultivadas no Horto de Plantas Medicinais na safra anterior e mantidos em câmara fria e plantadas em recipientes confeccionados com papel jornal preenchidos com substratos de seis composições, a saber: T1= 100% substrato comercial (C); T2= 100% solo (S); T3= 80% C + 20% S; T4= 60% C + 40% S; T5= 40% C + 60% S; e T6= 20% C + 80% S. Os seis tratamentos foram arranjados no delineamento experimental blocos casualizados, com oito repetições e unidade experimental composta por 20 recipientes de papel. Os tratamentos no campo foram os mesmos seis tratamentos do pré-plantio, arranjados no delineamento experimental blocos casualizados, com quatro repetições e unidade experimental composta por 12 plantas de mandioquinha-salsa. Na propagação inicial, a maior altura das plantas foi de 9,56 cm aos 29 dias após plantio (DAP) e a porcentagem média de sobrevivência foi de 35,37% aos 36 DAP, quando se realizou o transplantio. A taxa de sobrevivência das plantas no campo foi de 67,65%. Os maiores valores para altura das plantas (34,09 cm); diâmetro do coleto (62,54 cm) e número de folhas (34,82) foram observados nas plantas aos 204 dias após o transplantio (DAT). O valor médio do índice SPAD foi de 36,34. As maiores massas frescas de folhas (9,54 t ha-1), de rebentos (13,53 t ha-1) e de raízes comercializáveis - RC (18,52 t ha-1) foram obtidas nas plantas do T6 (tratamento T6) e as de raízes não-comercializáveis - RNC (3,08 t ha-1) nas do T1 (tratamento T1). As maiores massas secas de folhas (1,38 t ha-1), de rebentos (2,41 t ha-1), de RC (3,88 t ha-1) e de RNC (0,67 t ha-1) foram das plantas do tratamento T6. As massas frescas e secas de coroas apresentaram média geral de 4,25 t ha-1 e 0,83 t ha-1, respectivamente. Os maiores números de RC (277.200 ha-1) foram obtidos nas plantas dos tratamentos T4 e T6, e os de RNC (415.800 ha-1) e de rebentos (1.059.300 ha-1) foram nas do tratamento T6. Os maiores diâmetros de RC (38,27 mm) e de RNC (21,91 mm) foram das produzidas pelas plantas do tratamento T1. Os maiores comprimentos das RC foram das plantas do tratamento T6 (10,16 cm) e das RNC foi nas do tratamento T1 (5,72 cm). Na avaliação agroeconômica, os custos estimados variaram em R$ 24.896,31 entre o maior custo (R$ 103.195,94) do tratamento T1 e o menor custo (R$ 78.299,63) do tratamento T2. Concluiu-se que a maior produtividade de raízes comercializáveis (18,52 t ha-1) e a maior renda líquida (R$ 27.841,12) foi das plantas de mandioquinha-salsa 'Amarela de Carandaí' propagadas em recipientes de papel preenchidos com a mistura de 20% de substrato comercial e 80% de solo.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede.ufgd.edu.br:tede/331 |
| Date | 07 August 2015 |
| Creators | Miyashiro, Masanori Reinaldo |
| Contributors | Zárate, Néstor Antonio Heredia, Vieira, Maria do Carmo, Torales, Elissandra Pacito, Santiago, Etenaldo Felipe |
| Publisher | Universidade Federal da Grande Dourados, Agronomia - Mestrado, UFGD, Brasil, FCA |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFGD, instname:Universidade Federal da Grande Dourados, instacron:UFGD |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
| Relation | 4877631719497235716, 500, 500, 600, 1720353845975048257, -3091138714907603907 |
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