Banca de QUALIFICAÇÃO: MARIA LUANA SOARES LOPES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA LUANA SOARES LOPES
DATE: 08/08/2023
TIME: 09:00
LOCAL: Plataforma Google Meet
TITLE:

Consortium forage cactus and forage sorghum as a support for food instability in animal production in the semiarid region

KEY WORDS:

Caatinga, Forage, Ruminant Production 

PAGES: 52
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Manejo e Conservação de Pastagens
SUMMARY:

The intercropping of palm and sorghum forages can be a strategy to overcome seasonality in forage production typical of the semiarid region. In view of this, the objective of this study was to evaluate the productive and nutritional quality of palm and sorghum intercrops under rainfed conditions, in order to identify the most advantageous alternative to the conditions of the region. A randomized block design with three replications was carried out in an area of the Experimental Farm of UFRPE. Three sorghum (Sorghum bicolor) genotypes - BRS-Ponta Negra (S1), IPA-SF-15 (S2) and BRS-506 (S3) - were evaluated in a monoculture system and intercropped with cactus pear - Opuntia stricta Var. Mexican Elephant Ear – (3x2 factorial). This succulent was evaluated in exclusive planting and under intercropping effect (factorial 1x2). At the end of the cycle, morphological data were collected in both cultures. The plants were cut and weighed to determine the productivity of green matter (PMV) and dry matter (PMS). Furthermore, forage sampling was carried out for chemical-bromatological evaluation. Data were subjected to analysis of variance, and means were compared using Turkey's test (5%). The highest number of live leaves on the stem (NFVC) was found in S2 (4.75 leaves), as well as the highest values for plant height (AP), stem diameter (DC) and panicle length (CP): 208 .80 cm, 1.54 cm and 18.32 cm, respectively. The number of live tillers (NPV) and the number of live leaves on tillers (NFVP) was highlighted in S3 (4.30 and 15.80, in that order). Genotypes 1 and 2 did not differ statistically (p>0.05) in the variables DC, NFVC and NFVP. Variety S1 was statistically equal to S3 (p>0.05) in the AP variable and presented intermediate NPV (2.25) and CP (13.90 cm) values. There was no statistical difference (p>0.05) between the genotypes for the number of dead leaves on the stem (NFMC) and total live leaves (NFVT) – with production of 5.5 and 14.11, respectively. S3 had the highest dry matter (DM) and mineral (MM) contents, thus the lowest organic matter (OM) content: 418.06 g/kg green matter, 35.17 g/kg DM and 964.82 g /kg MS, in that order. The consortium increased the NPV (p=0.01112), NFVP (p=0.0283), NFVT (p=0.0370) and MM (p=0.0139). There was no effect of variety (p>0.05) or cultivation system (p>0.05) on crude protein (CP), ether extract (EE), total carbohydrates (CHO), fiber in neutral detergent (NDF), acid detergent fiber (ADF), acid-digested lignin (LDA), cellulose (CEL) and hemicellulose (HEM). In cactus pear, intercropping increased (p<0.05) the number of secondary (NCS) and total (NCT) cladodes, as well as EE and ADF contents. The PMV and PMS of palm and sorghum were not affected by the cropping system (p>0.05). There was also no variation between sorghum genotypes (p>0.05). Therefore, the stability in PMV, PMS and most of the bromatological variables in the analyzed plants, in both cropping systems, indicates that the intercropping increases the forage productivity per area, with minimal effect on the nutritional quality of the forages, which the makes it an advantage for production systems in passive areas of instability in food safety for animals.

COMMITTEE MEMBERS:
Presidente - ALBERICIO PEREIRA DE ANDRADE
Externo à Instituição - DANIEL BARROS CARDOSO
Externo à Instituição - FERNANDO DOS SANTOS ARAÚJO