The Effects Of Feeding Paddy On Production Performance And Egg Quality In Organic Laying Hens And The Research Of Egg Quality Within Organic Eggs And Conventional Eggs

Agriculture is very important to food security, poverty reduction and the protection of important natural resources. While, the improvement of modern agricultural chemical and pharmaceutical industry,and he abuse of drug and antibiotics, cause great harm to the land, environment and other species.So food security issue has become a worry in the heart of people. In this context, the natural pollution-free organic agriculture and organic food have great development. We study the effect of diets replaced by paddy partially on production performance, economic efficiency and egg quality in green shell laying hens with organic feeding, and the differences between organic green shell eggs and several commercially available conventional eggs in quality. We conducted to find out the practical techniques of organic farming and verify organic green shell eggs utility value, and provide a theoretical basis for the development of the organic poultry industry. The results were as follows:Experiment1:The effect of diets replaced by paddy partially on production performance and economic efficiency in green shell laying hens900laying hens were selected and randomly divided into three treatments with three replicates. Hens were fed with30%organic paddy and70%organic ration in treatment1,15%organic paddy and85%organic ration in treatment2and fed total ration in treatment3as control in six weeks. In the first five weeks, the eggs production rate had no significant difference in each treatment.The eggs production rate in treatment1was lower than both treatment2and3(P<0.05), but there was no significant difference between treatment2and3(P>0.05); the eggs production rate in treatment1was lower than treatment2(P<0.05) and extremely lower than treatment 3(P<0.01) during the trial period. There was no difference on egg ratio and egg weight in each treatment during the trial period. Compared with treatment3, the economic efficiency of treatment1and treatment2had a tendency to increase. The results showed that there was no effect on production performance and economic efficiency. The conditional farmer could use paddy replace15%ration to get more income during the period that the low free-range laying hens were in low performance.Experiment2:The research of egg quality and the effects of paddy partial substitution of feed diets on egg quality in organic green shell laying hensAccording to the grouping of experiment1, We collected three egg samples of three treatments in the trial of21d and42d, at the same time bought three kinds of conventional eggs in the market to analysis of egg quality. It showed that there is no significant difference between three treatments in egg shape index, eggshell strength and thickness, eggshell ratio, yolk ratio, haugh unit, water content ratio of albumen and yolk, crude protein content in albumen, crude fat and cholesterol content in yolk, SFA, MUFA, PUFA, n-6PUFA, n-6PUFA/n-3PUFA ratio(P>0.05); Just at42d treatment1if significantly higher than treatment2and3in n-3PUFA content(P<0.05), there is no difference between treatment2and3(P>0.05); But feeding on paddy has a downward trend in the yolk color, and at42d treatment1significantly lower than control group(P<0.01), no difference between treatment2and3(P>0.05). Compared with three kinds of conventional eggs, organic green shell eggs show extremely significant higher index in egg yolk ratio, yolk color and haugh unit(P<0.01); At the same time, organic eggs contain high n-6PUFA/n-3PUFA ratio, and significantly higher than the conventional green shell eggs and pink shell eggs(P<0.01). In conclusion, feeding paddy can improve organic n-3PUFA content in egg yolk, but feeding more quantity may cause the loss of yolk color; Compared with the conventional eggs, organic green shell eggs show better quality.