Proximate and phytochemical changes in hydrothermally processed rubber (Hevea brasiliensis) leaf meal

Abstract

Rubber leaves are a large by-product of rubber plantations which could serve as an important source of unconventional feed of agro by-product origin. However, it contains antinutritional factors which limits it utilization on a large scale as feed for animal nutrition. This study seeks to improve the nutritional value of rubber leaves meal through hydrothermal processing. Fresh leaves of rubber were collected from Rubber Research Institute of Nigeria in Benin City, and divided into five batches; four of these batches were subjected to varying periods of hydrothermal processing namely, 5, 10, 15 and 20 minutes, while one batch was kept as control without processing. Result reveals significant reduction in phytic acid, Hydrocyanic acid and Tannin as the processing time progressed. However, crude protein increased till the 10 min and significantly reduced thereafter and contrary to this, fat and ash significantly reduced as the time increased. Nutritional trials with various animals are recommended to evaluate feed utilization as a result of this processing method. Keyword: Unconventional feed stuff, Hydrogen Cyanide, Crude protein, Antinutritional factor.