Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Diante da importÃncia sÃcio-econÃmica do cajueiro para regiÃo nordeste do Brasil bem como
as dificuldades relacionadas à escassez hÃdrica e qualidade de Ãgua para irrigaÃÃo, objetivouse
estudar o desenvolvimento de clones de cajueiro anÃo precoce em diferentes estÃdios de
desenvolvimento sob irrigaÃÃo com Ãgua salina. O primeiro experimento objetivou avaliar a
germinaÃÃo e o desenvolvimento inicial de plÃntulas de cajueiro anÃo-precoce (clones: CCP
06, BRS 189, BRS 226 e BRS 265), em ambiente protegido e irrigadas com diferentes
soluÃÃes salinas, visando observar respostas diferenciadas entre os clones. Os tratamentos
foram dispostos em esquema fatorial 5 x 4 com quatro repetiÃÃes, referentes a soluÃÃes
salinas ajustadas para as condutividades elÃtricas (CEa) (0, 3, 6, 9 e 12 dS m-1), e 4 clones de
cajueiro (CCP 06, BRS 189, BRS 226 e BRS 265). Trinta dias apÃs a emergÃncia das
plÃntulas, os dados foram coletados e submetidos à anÃlise estatÃstica. Todas as variÃveis de
emergÃncia foram influenciadas pela salinidade. A irrigaÃÃo com Ãgua salina proporcionou
um acrÃscimo nos teores de Na e Cl nas diversas partes das plantas, afetando negativamente
todas as variÃveis de crescimento inicial dos clones de cajueiro anÃo precoce. Sendo o clone
CCP 06 o mais tolerante a salinidade comparado aos demais clones estudados. O segundo
experimento objetivou avaliar o desenvolvimento de plantas de cajueiro anÃo precoce clone
BRS 189 sob irrigaÃÃo com Ãgua salina. O experimento foi conduzido no Campo
Experimental de Pacajus da Embrapa AgroindÃstria tropical. Mudas do clone BRS 189, sobre
porta enxerto do clone CCP 06, foram transplantadas para solo e a partir do segundo mÃs
iniciou-se a aplicaÃÃo dos tratamentos. Os tratamentos foram dispostos em blocos ao acaso
com quatro repetiÃÃes e quatro plantas por parcela experimental, referentes Ãs soluÃÃes salinas
ajustadas para as condutividades elÃtricas (CEa) (0,8, 3,0, 6,0, 9,0 e 12,0 dS m-1). Decorridos
cinco meses obteve-se os dados e aplicou-se anÃlise estatÃstica. Todas as variÃveis de
desenvolvimento e a MSF foram influenciadas pela salinidade. Das trocas gasosas apenas a
transpiraÃÃo foi afetada pela salinidade. A salinidade limite encontrada no presente estudo foi
de CEa de 1,56 dS m-1 para diminuiÃÃo no rendimento potencial de atà 10% . / Considering the socio-economic importance of cashew to the Brazilian northeast and the
northeastern problems with water scarcity and quality of irrigation water, the objective of this
work was set to study the development of dwarf cashew clones at different stages of
development under irrigation with saline water. The first experiment was aimed at evaluating
the germination and early growth of seedlings of precocious dwarf cashew (clones: CPC 06,
BRS 189, BRS 226 and BRS 265) in greenhouse when irrigated with different salt solutions,
in order to observe the differences between the respective responses. The treatments were
arranged in a 5 x 4 factorial with four replications, referring y to saline solutions with
respective salinities corresponding to the electrical conductivities (ECw) 0, 3, 6, 9 and 12 dS
m-1, and four cashew clones (CCP 06 , BRS 189, BRS 226 and BRS 265). Thirty days after
seedling emergence, the data were collected and analyzed statistically. All emergence
variables were influenced by the salinity. The irrigation with saline water resulted in increased
levels of Na+ and Cl- in different plant parts, adversely affecting all the variables of the initial
growth of the dwarf cashew clones, with the CCP 06 clone showing the highest salinity
tolerance among the clones. The second experiment was aimed at evaluating the growth of
dwarf cashew clone BRS 189 under irrigation with saline water. The experiment was
conducted at the Pacajus Experimental Field of the Embrapa AgroindÃstria tropical. The BRS
189 seedlings on the CCP 06 clone rootstock, were transplanted to the ground and subjected
to the treatments, from the second month onwards. The treatments were arranged in blocks
with four replications and four plants per plot, refering to saline solutions corresponding to
the electrical conductivities (ECw) 0.8, 3.0, 6.0, 9.0 and 12.0 dS m-1. After five months, the
data were obtained, and subjected to statistical analysis. All the development variables and
the leaf dry mass (LDM, or MSF) were influenced by salinity. Only perspiration (of the gas
exchanges) was affected by salinity. The salinity limit found in this study corresponded to an
electrical conductivity of 1.56 dS m-1, to a fall in potential yield of up to 10%
| Identifer | oai:union.ndltd.org:IBICT/oai:www.teses.ufc.br:4626 |
| Date | 28 March 2011 |
| Creators | Alan Bernard Oliveira de Sousa |
| Contributors | Marlos Alves Bezerra, Claudivan Feitosa de Lacerda, LuÃs de FranÃa Camboim Neto |
| Publisher | Universidade Federal do CearÃ, Programa de PÃs-GraduaÃÃo em Engenharia AgrÃcola, UFC, BR |
| 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 UFC, instname:Universidade Federal do Ceará, instacron:UFC |
| Rights | info:eu-repo/semantics/openAccess |
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