Banca de DEFESA: LUCAS FERREIRA DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCAS FERREIRA DA SILVA
DATE: 28/07/2023
TIME: 14:00
LOCAL: Departamento de Zootecnia
TITLE:

Forage accumulation, water storage, and nutritive value of the forage cactus Orelha de Elefante Mexicana under different row spacing and harvesting management

KEY WORDS:

Cactus pear, chemical composition, harvest frequency

PAGES: 38
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Avaliação, Produção e Conservação de Forragens
SUMMARY:

The objective of this study was to evaluate the effect of planting spacing and harvest management on forage accumulation, water storage, rainwater use efficiency and nutritive value and forage cactus Orelha de Elefante Mexicana (OEM) [Opuntia stricita (Haw) Haw]. The experiment was carried out in a palm grove located at the experimental station of the Instituto Agronômico de Pernambuco, in Arcoverde-PE. Treatments were randomized in split-plot blocks, with four replications. The main plot was formed by different planting densities and the subplots formed by the factorial arrangement between two frequencies (annual and biennial harvest) and two cutting intensities (preservation of mother or primary cladodes after harvest). The planting spacings tested were 1.80 m ´ 0.10 m; 1.80 m ´ 0.20 m; 1.80 m ´ 0.40 m; 1.80 m ´ 0.80 m, corresponding to planting densities of, 55,555, 27,777 13,888, and 6,944 plants per ha^-1, respectively. Green matter production (PMV), dry matter production (PMS), forage accumulation rate (FAR), water storage (WE), rainwater use efficiency (RWUE), nutritive value, and fractionation of proteins and carbohydrates. The biennial harvest favored greater PMV 512786 kg MV ha^-1, greater PMS 65505 kg DM ha^-1, TAF 95 kg ha day^-1, WE were greater 447213 kg ha^-1, when the OEM palm was harvested every two years. Lower DM 107 g kg^-1 and higher concentration of crude protein 95 g kg^-1 was observed when the annual harvest was adopted. Planting density did not affect PMV, PMS, TAF and WE. And it had a limited effect on the nutritional characteristics of the harvested forage. The small variation in the nutritional value and fractions of proteins and carbohydrates between the annual and biennial cuts, and the highest PMV, PMS, TAF and EA observed in the biennial harvest indicates that the increase in the frequency of harvesting does not contribute to the optimization of cactus cultivation OEM under the studied conditions.

COMMITTEE MEMBERS:
Presidente - VALDSON JOSE DA SILVA
Externo à Instituição - MARCOS NEVES LOPES - IFPI
Externa à Instituição - MARIA DA CONCEICAO SILVA - IPA