Study On The Law Of Manure Emissions And The Effect Of Reduction By Duck Farm Controlled Into The Baiyangdian From The Source

Due to the backwardness of harmless treatment and resource recycling of livestock feces, the disposal pollution such as livestock feces around the lake was one of the main sources of nitrogen and phosphorus pollution of water bodies. This research investigate the actuality of duck farming in Baiyangdian, the emission of duck manure pollution and the condition of water pollution, and analyze the fecal rate of loss and into the water law, and study the effect of fecal pollutants emission reduction controlled from the source. The main results are as follows:(1) Baiyangdian duck breeding areas in herds of about 1,287,000, of which duck herds accounted for 75%, SM3 is the main varieties of duck farming model based on small-scale backyard, duck manure produced the total of about 40,200 t, duck manure pollutants TN, TP, organic matter, ammonia, Cu and Zn annual emissions were about 1389.75t, 498.64t, 2.05万t, 34.85t, 1.50t and 9.46t. Baiyangdian waters exceeded the traditional duck farming serious water quality factor is TP, TN, COD, and ammonia and other organic pollutants, especially TP higher than the standard, exceeding multiples of up to 21%, followed by TN, COD, water belong to the V class .(2) Regional duck facal rate of loss about 33.80%~ 67.71%, the mainly related to the seasons, the facal rate of loss in summer of high temperature more than to in winter of low temperature about 2 times, indicating high frequency and long time in the water, greater impact on the water in summer. Summer feed intake and fecal excretion were significantly higher in winter than in winter, respectively 1.5 times and 2 times the single duck manure in summer daily emissions of about 0.13kg, the more that feed intake, fecal excretion of more of the The greater the environmental impact.(3)Effect of sodium butyrate on growth performance and fecal pollutants emission reduction of broiler ducks. The resaults showed that 1)the feed to gain ratio of each group which added sodium butyrate was significantly lower,each decreased 4.95%,6.71% and 4.59%(P<0.05)respectively.Average Daily Gain shows growth trends,the Average Daily Gain of experimental group III,IV has significantly improved 9.16% and 9.47%(P<0.05).There was no singnificant differences between Average Daily Feed Intake and final weight.2)Add sodium butyrate can significantly reduce TN,TP,ammonia nitrogen, organic matter,Cu,Zn in duck manure(P<0.05),experimental group II decreased 4.37%,13.82%,41.81%,5.45%,2.30% and 13.41% respectively,experimental group III decreased 6.16%,17.33%,59.98%,4.32%,21.68% and 18.96% respectively,experimental groupⅣd ecreased 2.68%,10.64%,43.61%,3.76%,40.97% and 14.88% respectively;3)Although there was no significant differences berween different levels of sodium butyrate on daily feces excretion, it tended to decrease,it can reduced pollutants emissions in duck feces significantly(P<0.05),Experimental group III has the best result to reduce the emissions of pollutants TN,TP,ammonia nitrogen,organic matter.The experimental groupⅣhas the best result to reduce the emissions of Cu.As it can be seen,added 700mg/kg in duckling diets,Sodium butyrate may be the best production performance and has the best result on emission reduction.(4)For Baiyangdian duck breeding patterns of different levels of inorganic phosphorus Dietary Phytase on Production Performance and duck manure content and emissions of pollutants studied. The results showed: Phytase level of 25% dicalcium phosphate test group of egg production and egg weight were the highest, respectively, than the control group increased 1.89% (P<0.01) and 0.34% (P>0.05), feed to egg ratio lower than the expected 0.23% (P>0.05). Different levels of inorganic phosphorus Phytase can significantly reduce the duck feces TN, TP, ammonia nitrogen, organic matter, Cu and Zn contents and emissions (P <0.01), which on the TN and ammonia content and the impact of emissions testing Group 3 was the best, compared with the control group, levels were reduced by 12.82% and 44.14%; experimental group 4 the best reduction of organic matter, the content decreased 17.18%; of TP, Cu and Zn reduce the impact of the experimental group 5 Ranked the best, respectively, 32.60% lower than the control group, 30.88% and 4.60%. Taken together, phytase retained 25% dicalcium phosphate gives the best...