Banca de DEFESA: CLAUDIA MACIEL FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CLAUDIA MACIEL FERREIRA
DATE: 20/05/2022
TIME: 08:00
LOCAL: Google meet
TITLE:

EFFECT OF PLANTING SPACING AND CUTTING MANAGEMENT ON THE MORPHOLOGY AND PRODUCTIVITY OF MEXICAN ELEPHANT EAR PALM (Opuntia spp.)

KEY WORDS:

dry matter production, number of cladodes, plant height, plant width

PAGES: 33
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Avaliação, Produção e Conservação de Forragens
SUMMARY:

The forage cactus  “Orelha de Elefante Mexicana” (Opuntia spp.) has been widely used in the Northeast region of Brazil, in substitution to the use of other traditional cultivars, to prevent carmine scale. Thus, it is important to define planting and cutting management strategies for this cultivar. This study aimed to evaluate the effect of cutting intensity (preservation of the mother cladode or primaries) and planting spacing (1,80 m x 0,10 m; 1,80 m x 0,20 m; 1,80 m x 0,40 m; 1,80 m x 0,80 m.) on the morphology and productivity of the Ear de Elephant Mexicana cactus. The experiment was carried out in Arcoverde, Pernambuco, Brazil. The treatments were randomized in blocks with split plot, with four replications. The main portion was formed by the planting spacings and subplots by cutting intensities. The 2020 harvest data were submitted to ANOVA and the means compared by the Tukey test at 5% probability. Main component analysis was performed using RStudio software (RStudio 2022.02.0 Build 443). The shear intensity preserving the primary cladodes primary compared to maintenance of parent cladodes favored greater plant height (95,12 cm vc. 63,28) cladode length (32,49 vs. 29,57 cm) cladode width (19,82 vs. 17,37 cm), cladode area (499,91 vs. 407,87 cm²), leaf area index (3,06 vs. 1,33), production of green matter (199,4 vs. 95,8 t ha -1 .ano-1), dry matter production (18,8 vs. 9,2 t ha -1 .ano-1), crop water accumulation (180,5 vs. 86,6 t ha -1 .ano-1), rainwater use efficiency 23.8 kg MS mm-1. The spacing of 1.8m x 0.40m promoted plants with greater spacings, green matter production (198 t ha -1 .ano-1), crop water accumulation (179,1 t ha -1 .ano-1), rainwater use efficiency 23.8 kg of MS mm-1). The spacing of 1.8m x 0.40m promoted plants with greater spacings green matter production (198 t ha -1 .year-1), crop water accumulation (179.1 t ha -1 .year-1 ), rainwater use efficiency 23.8 kg DM mm-1) and dry matter production (18.9 t ha -1 .year-1). That did not defer to the result obtained in the spacing of 1,8 m x 0,80 m (13,4 t ha -1 .ano-1). The spacings of 1.8 m x 0.80 m and 1.8 m x 0.40 m favored greater plant height (85.26 and 84.41 cm, respectively) and cladode width (20.34 and 19.98 cm, respectively). The highest cladode area index (3.09) was obtained in the spacing of 1.8 m x 0.10 m and 1.8 m x 0.20 m, and the latter did not differ from the others. In the spacings of 1.8 m x 0.80 m and 1.8 m x 0.40 m when primary cladodes were preserved the highest results obtained for the plant width characteristics (131.31 and 119.00 cm, respectively) total photosynthetic area (33642.99 and 25248.73 cm2, respectively), and total number of cladodes (57.88 and 46.0 respectively). The greater planting spacing promoted higher production of dry matter per plant (2941.6). Preservation of primary cladodes at harvest provides for the development of larger and wider plants, with greater cladode area, greater productivity and greater accumulation of water by the of the “Orelha de Elefante Mexicana”.. The planting spacing of 1.8 m x 0.40 m favors higher productivity of the of the “Orelha de Elefante Mexicana”.

BANKING MEMBERS:
Presidente - 3514546 - MARCIO VIEIRA DA CUNHA
Interna - 385004 - MERCIA VIRGINIA FERREIRA DOS SANTOS
Externo ao Programa - 1757943 - THIERES GEORGE FREIRE DA SILVA