發(fā)布時間：2018-07-10 01:45

  本文選題：光照時間 + 光照強度��； 參考：《中國畜牧雜志》2017年07期

【摘要】：本試驗旨在研究在半開放式肉雞墊料平養(yǎng)模式下,夜間補光時間和強度互作對肉雞生長性能和免疫功能的影響。將840只1日齡嶺南黃公母混合雛隨機分為4組,每組3個重復(fù),每個重復(fù)70只。試驗采用2(光照時間)×2(光照強度)因子設(shè)計,光照時間分為持續(xù)光照(24 L)和間歇光照(3D:1L),光照強度分別為10 Lx和30 Lx。試驗期共50 d,分生長前期(1~21 d)和后期(22~50 d)2個階段。結(jié)果表明:間歇光照較持續(xù)光照顯著提高了各生長階段的日采食量,提高了后期日增重并降低了耗料增重比(P0.05),間歇光照組肉雞21 d脾臟和法氏囊指數(shù)、50 d脾臟和胸腺指數(shù)及免疫球蛋白Ig M水平顯著高于持續(xù)光照組(P0.05),光照強度對生長性能指標(biāo)和免疫指標(biāo)均無顯著影響,與光照時間也無交互作用(P0.05)。在本試驗條件下,采用3D:1L間歇光照模式和10 Lx光照強度,能使肉雞獲得最優(yōu)的生產(chǎn)性能和免疫功能,并節(jié)約電能。
[Abstract]:The purpose of this study was to study the effects of night light supplementation time and intensity interaction on growth performance and immune function of broilers under semi-open broiler feeding model. Eight hundred and forty 1-day-old Lingnan Yellow male and female chicks were randomly divided into 4 groups, each with 3 replicates and 70 with each replica. The experiment was designed with 2 (light time) 脳 2 (light intensity) factor. The illumination time was divided into continuous illumination (24L) and intermittent illumination (3D: 1L). The light intensity was 10Lx and 30Lx, respectively. The experiment period was 50 days, which was divided into two stages: early growth stage (1 ~ 21 days) and late stage (22 ~ 50 days). The results showed that the daily feed intake of different growth stages was significantly increased by intermittent illumination than that by continuous illumination. The daily gain and feed gain ratio (P0.05) were increased in the later stage. The spleen and thymus index and immunoglobulin IgG M levels in the intermittent illumination group were significantly higher than those in the continuous illumination group (P0.05). The spleen and thymus index and immunoglobulin IgG M levels in the intermittent illumination group were significantly higher than those in the continuous illumination group (P0.05). The long performance index and immune index had no significant effect. There was no interaction with light time (P0.05). In this experiment, 3D: 1L intermittent illumination mode and 10LX light intensity were used to make broiler gain the best performance and immune function, and save electric energy.
【作者單位】： 浙江大學(xué)動物科學(xué)學(xué)院;
【基金】：國家重點研發(fā)計劃(2016YFD05005) 國家現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系(CARS-42-G19)
【分類號】：S831

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