Data/hora: 24/06/2024 11:35:11

Biblioteca(s): | Embrapa Pantanal; Embrapa Semiárido.
Data corrente: | 27/06/1994
Data da última atualização: | 18/07/2018
Autoria: | HAMMER, P. A.
Afiliação: | Cornell University.
Título: | Estimation of a five factor response surface for plant growth in a controlled environment chamber.
Ano de publicação: | 1973
Fonte/Imprenta: | [S.l.]: Cornell University, 1973.
Páginas: | 136p.
Idioma: | Inglês
Notas: | Ph.D. Thesis.
Conteúdo: | A second degree central composite rotatable experimental design of 5 environmental variables (day, night and root temperature; day lenght; and light intensity) was used to estimate growth response surfaces for Zinnia elegans Jacq. Eldorado and Helianthus annuus L. Mammoth grown in controlled environment chambers. Significant lack of fit of the estimated equation was observed for all growth parameters (fresh and dry weight of tops, dry weight of roots, total dry weight, number of leaves, stem lenght, and leaf area) measured for zinnias. It is suggested the large experimental error may be reduced if the plants were grown for 3 weeks instead of 2 weeks before growth measurements are made. A leaf disorder resembling calcium deficiency was noted on zinnia plants grown at a root temperature of 26.7oC. This could certainly be an interesting area of continued research. Fresh and dry weight of tops, dry weight of roots and total dry weight for sunflowers estimated equations suitable for first approximation response surfaces. The model predicted maximum growth (weight) of sunflowers occurred outside of the design space. More experimentation is needed at day/night temperature > 37.8oC, root temperature > 26.7oC, light intensity > 3500 ft-c and day length > 23 hours to find those conditions that maximize growth given the 5 environmental variables in the present study. Additional experiment at the boundary of design space are suggested for substancial improvements in the present model.
Palavras-Chave: | Environmental control; Growth; Modelo; Plant; Production; Productivity; Sanflowers.
Thesagro: | Crescimento; Estatística; Helianthus Annuus; Meio Ambiente; Planta; Produção; Produtividade; Zinnia Elegans.
Thesaurus Nal: | environment; statistical analysis.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)

Exemplares:

CPATSA - (23737-1) - ADD - TS - PP - 11/1973 -  - 1973.00011 - DIS
CPAP - (33975-1) - ADD - TS - PP - TS89.00351 -  - 1989.00351 - DIS