Abstract
Quality of eggs might decrease when hens under heat stress. A further study found that a specific plant extracts could reduce the impacts of heat stress. The aim of this study was to determine effects of Salix tetrasperma plant extract in combination with extract of turmeric and neem to improve egg quality and productivity of laying hens under heat stress. Sixty laying hens strain Isa Brown of 6 months old were used and reared in individual cages. The feed and drinking water were supplied ad libitum. This study was conducted in a completely randomized design with five treatments (two controls and three treatments) and each treatment consisted of 12 replication. Treatment consisted of with (KP) and without (KP) commercial anti-stress supplement. Formulations of extract were S. tetrasperma 1.000 mg / l water (EJ), S. tetrasperma 1.000 mg / l + Turmeric 250 mg / l + neem 250 mg / l (EJ+K1), and S. tetrasperma 1.000 mg / l + Turmeric 500 mg / l + neem 500 mg / l drinking water (EJ+K2). The hens were exposed to heat stress for 5 hours per day at a temperature range of 34.0±1.0°C. Supplements were dissolved in drinking water and were given for 30 days in the morning and noon. Results showed that a single extract of S. tetrasperma or the combination of an extract of turmeric and neem were significantly increased thickness of eggshell (P<0.05), but did not affect color of egg yolk, height albumin, egg weight, and HU value. Extract of S. tetrasperma combined with turmeric and neem extract dissolved in drinking water for 30 days in laying hens reared under heat stress could not improved quality of the eggs, but may increase thickness of the egg shell and cause decreased water consumption.
Highlights
Environment temperature in several areas in Aceh Province is relatively high
The last research result showed than administration of Salix tetrasperma, both as a single or combined with extract of tumeric and neem may be used to decrease heat stress impact and did not affect health status of laying hen (Sugito et al 2014)
Extraction of S. tetrasperma leaf, turmeric rhizome, and neem leaf were conducted by maceration method
Summary
Environment temperature in several areas in Aceh Province is relatively high. During the day in the dry season, temperature is around 31-35oC. Ahmadi & Rahimi (2011) said that temperature and humidity in an area became a critical factor affecting laying hen production. The last research result showed than administration of Salix tetrasperma, both as a single or combined with extract of tumeric and neem may be used to decrease heat stress impact and did not affect health status of laying hen (Sugito et al 2014). The main bioactive compound of the S. tetrasperma is salicylic acid, curcumin in the turmeric and nimbidin in the neem plant and those derivatives By formulating those 3 plants, it is be expected that afication of the bioactive compound will has better synergy impact to decrease heat stress impact in laying hen. This study was aimed to determine effect of administration of S. tetrasperma extract single or combined with extract of turmeric and neem to improve quality and egg productivity of laying hen experienced heat stress
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