| In order to study the environmental assessment index and its relationship with layerlaying performance, from November2013to May2014, we study two relative independentresearches on120,000hailan brown layers of modern laying farm in Shaanxi Dajiangcompany: comprehensive evaluation of main environmental parameters in winter and springin ultra-large-scale laying houses and its relationship with layers’ lying performance, and lightdistribution in laying houses and its affects on layers’ lying performance. The study detailedmeasures the light distribution of ultra-large-scale laying house， CO2，NH3，O2，concentration， temperature,wind velocity,total dust concentration and respirable dustconcentration in different environmental modes of laying houses in winter and spring, andlayers’ laying performance, in order to get comprehensive environmental evaluation, lightdistribution and their relationship with layers’ laying performance of ultra-large-scale layinghouses in winter and spring, to lay the foundation of modern ultra-large-scale layers’ efficientproduction.The results showed that:First, the test content and results:1) comprehensive evaluation within the winter and spring, ultra-large-scale coop keyenvironmental parameters(1) winter environment comprehensive evaluation index: ZF=29.665%F1+27.371%F2+26.676%F3, which:F1=-0.111a-0.306b+0.453c+0.198d+0.438e+0.145f+0.1gF2=0.484a+0.22b+0.73c+0.517d+0.057e-0.006f-0.189gF3=-0.111a-0.035b+0.137c-0.065d+0.051e+0.541f+0.611g(2) Spring environment comprehensive evaluation index: ZF=57.956%F1+25.324%F2, whichF1=0.295a+0.015b-0.339c+0.173d-0.261e+0.201f+0.311gF2=-0.166a+0.348b+0.885c+0.072d+0.144e-0.021f-0.204gIn the formula, a, b, c, d, e, f, g represent the CO2concentration, temperature, wind speed, NH3concentration, O2concentration, and total respirable dust concentration of the dustconcentration.These ultra-large-scale winter and spring laying house environment comprehensiveevaluation index with the actual monitoring data comparison, spring chicken coopenvironment in line with the actual comprehensive evaluation index of100%, in line with thedegree of winter sheds86.7%.2) the relationship between winter and spring ultra-large-scale integrated environmentalevaluation index sheds and production performance of laying hensExperimental determination to further explore the age of the chicken coop uniformmethod of comprehensive environmental assessment of environmental indicators index15points180d of the results of the cumulative206-day period and its correspondingperformance of laying hens (laying rate, average egg weight) related sex. The resultsshowed that winter Comprehensive Assessment of Environmental Performance Index and theultra-large-scale egg production sheds a significant correlation between the spring andenvironment comprehensive evaluation index and performance of laying hens no significantcorrelation. Description of the type of access point coop environmental factors measured withgood representation and good control of this comprehensive evaluation index valuedetermination has established an important reference for the normal production of layinghens.2light intensity distribution relationship ultra large scale and laying house and layingperformance1) sheds light intensity distribution: There are five test trial sheds vertical channels,each channel has a vertical height two sources, two low-light (high light) spacing6m, lowlight staggered distribution, high light height from the ground2.1m low light from the ground1.8m. Uniform sampling method to select a representative eight measurement cells, eachmeasuring all44representatives of different positions cage care intensity, corners and thecentral five points each cage position as a test point, averaging five test points as a bit of lightintensity of the cage, and then infer the light distribution throughout the house. The resultsshowed that:120,000ultra-large-scale chicken hens in cages Scotia location average lightdistribution into four categories: below7lx cage bit accounted for65.91%;7-14lx cage bitaccounted for20.45%,14-35lx accounting for11.37%of the cage bit higher than35lx bitaccounted for2.27%of the cage. Description sheds light intensity distribution is uneven, the overall light intensity is low.2) the impact sheds light intensity on performance of laying hens:4classes according tothe situation sheds light distribution, which is divided into four treatment groups. The samelight intensity (ie one treatment group) selected50cages bit (9birds/cage bits) per450chickens, and divided into five replicates of10-bit counter90test cages chicken, eachtreatment was measured for each repeat test chicken90d (chicken age of219days) layingrate and egg weight. The results show that large scale farming model, productionperformance of laying hens increased with light intensity curve showed decreased after thefirst rise, when the light intensity is6.4lx, egg yield of88.01%, with an average egg weightof61.23g, day total egg weight4851g, June herds chicken egg weight was27.31g/Kg;12.1lxlight intensity when the egg yield of89.42%, with an average egg weight of61.41g, day totalweight of4942g egg Japanese herds chicken egg weight was27.85g/Kg; when the lightintensity is17.9lx, egg yield of84.68%, with an average egg weight of61.18g, eggproduction total weight4662g, June herds chicken egg weight was26.59g/Kg; lightintensity when24.8lx, egg yield of88.32%, with an average egg weight of62.23g, eggproduction total weight4946g, June herds chicken egg weight was27.79g/Kg; illuminationintensity31.2lx when hens yield of88.33%, with an average egg weight of61.44g, eggproduction total weight4885g, June herds chicken egg weight was27.67g/Kg. From thisanalysis available, suitable light intensity12.1lx and24.8lx.Second, the test conclusion1) in winter and spring single building120,000homesultra large scale confined hens,uniform method selected15measurement points and therefore the environment, can wellrepresent a change in the type laying house environmental factors, principal componentanalysis in order to establish the principle of integrated environmental evaluation index, andlaying performance was significantly correlated with a good sense of practical application.Every4layer2)8layers laying house a very large scale light (incandescent light bulbspacing of3m,), the level of staggered layout (such as bubble adjacent high and lowdifference0.3m). In such light mode, sheds light intensity distribution is uneven, resulting inthe difference between laying performance, light intensity is too high, too low an impactboth on laying performance, suitable for light intensity12.1lx and24.8lx. |
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