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In this study closely around duck production and efficient use of phosphorus in practice commonly used vegetable feed ingredients and reduce phosphorus pollution of the environment as the theme. First collected common duck feed ingredients measured feed samples total phosphorus, phytate content and its true P utilization, and establish raw arguably phosphorus prediction model; then according to the prediction model raw arguably phosphorus content, corn - soybean meal - rapeseed meal based diet type, were designed for a variety of arguably the use of phosphorus and phytase level diet, combined with duck growth performance, serum markers, the tibia indicators and calcium and phosphorus apparent utilization evaluation indicators discussed in phytase corn - soybean meal - rapeseed meal diets conditions with arguably the equivalent relationship between the use of phosphorus, and thus determine the phytase phosphorus when the money under the dietary conditions of phytase in reasonable application of ducks has important theoretical significance and practical value. Test aims to explore the relationship of the duck commonly used feed ingredients total phosphorus and phytate phosphorus true utilization. Were determined by chemical analysis and gavage feed, total phosphorus, phytate content, adult Cherry Valley Duck real utilization of feed ingredients for phosphorus, derived raw materials arguably the phosphorus content of each raw material was arguably phosphorus The forecast model. Specific test results are as follows: (1) the average ratio of the total phosphorus content of phytate in corn, wheat processing by-products, soybean meal, rapeseed meal, DDGS samples were 80.46%, 73.48%, 44.16%, 62.11%, 32.47%; of total phosphorus and phytate content of all feed was a significant positive correlation (r = 0.81, P lt; 0.05), and the relationship between energy feed, total phosphorus and phytate (r = 0.98) than protein feed (r = 0.82) high. (2) by gavage measured adult Cherry Valley drake average true utilization of phosphorus in corn, wheat processing by-products, soybean meal, rapeseed meal, DDGS samples were 80.65%, 39.01%, 53.03%, 38.69%, 45.55 %. (3) predict two indicators of total phosphorus and phytate feed ingredients arguably phosphorus content, including corn, wheat processing byproducts and soybean meal sample predictive model significantly and higher reliability (R2), the phenomenon phosphorus (Y%) and total phosphorus (X1,%), phytate (X2,%) bivariate regression equation Y = 0.008 1.226X1-0.595X2 (R2 = 0.98, RSD = 0.004, P lt ; 0.05), Y = 0.047-0.148X1 0.640X2 (R2 = 0.77, RSD = 0.060, P lt; 0.05) and Y =, -0.141 2.779X1-4.610X2 (R2 = 0.85, RSD = 0.084, P lt; 0.05) . The results show that, with total phosphorus and phytate corn, wheat processing byproducts and soybean meal arguably phosphorus value can be accurately estimated. Trial to study different growth stages Ducks equivalent for different evaluation phytase phosphorus in corn - soybean meal - rapeseed meal diets conditions. Has four the arguably different use of phosphorus levels and four different level of phytase diets, arguably phosphorus levels :0-14d, respectively, 0.25%, 0.32%, 0.39%, 0.46% and 15 - 35d 0.20%, 0.27%, 0.34%, 0.41%; hypophosphatemia basal diet (treatment Ⅰ) add different gradient phytase in the phytase level as 300U/kg 600U/kg, 900U/kg , 1200U/kg. Other nutritional indicators consistent, calcium and phosphorus ratio was controlled at about 1.3:1. Set 8 deal with each treatment five replicates, each repeated 8 Yu Ducks, 320 Yu. Conducted the period 35d feeding trials, and brooding and growing two growth stages were the the slaughter test and metabolic tests. The test results show that the selection of the evaluation indicators have a greater impact on the results of the phytase phosphorus equivalent. Specific test results are as follows: (1) the feed intake evaluation index, add in a brood of dietary 500U/kg 1000U/kg phytase equivalent release of 0.03%, 0.07% arguably phosphorus growing season can be equivalent to the release of 0.02%, 0.14% arguably phosphorus; indicators for the evaluation of body weight gain, add in a brood of dietary 500U/kg 1000U/kg phytase equivalent release of 0.04%, 0.09% arguably the use of phosphorus, the growth period were equivalent to the release of 0.02%, 0.04% arguably phosphorus. (2) Evaluation tibia ash content in the diet of the Brood add 500U/kg 1000U/kg phytase were equivalent to the release of 0.02%, 0.06% arguably phosphorus growing season were equivalent release 0.02%, 0.04%, arguably phosphorus; Evaluation of tibial bone calcium content in the diet of the Brood add 500U/kg the 1000U/kg phytase were equivalent release 0.01%, 0.02% arguably phosphorus. growing season were equivalent to release 0.02%, 0.05% arguably phosphorus; Evaluation of the phosphorus content of the tibia, the brood of dietary Add 500U/kg 1000U/kg phytase 0.02%, respectively, equivalent to release 0.07% arguably phosphorus, growing season, respectively, equivalent to release 0.01%, 0.02% arguably phosphorus. (3) Evaluation apparent utilization of calcium in the diet of the brood of add 500U/kg 1000U/kg phytase equivalent release of 0.08%, 0.09% arguably phosphorus apparent use of phosphorus equivalent release rate evaluation index were 0.07%, 0.09% arguably phosphorus. (4) to the calcium content, as evaluation indexes, added in the growing season diet 500U/kg 1000U/kg phytase are equivalent release of 0.04%, 0.12% arguably the use of phosphorus, as evaluation indexes of hyperphosphatemia content can be respectively equivalent to release 0.03%, 0.01% arguably the use of phosphorus, which indicates that the phosphorus equivalent does not necessarily temperature increased with the phytase level, may also decreased. In summary, the conclusions of this study are as follows: (1) through the feed ingredients total phosphorus, phytate can predict raw arguably phosphorus content, including corn, soybean meal, wheat processing byproduct prediction model significantly and the coefficient of determination ( R2) higher. (2) does not wait for opportunity evaluation index phytase phosphorus when the differences between the money, do not wait for opportunity to the growth stage of the same evaluation phytase phosphorus when the value is also different. Can be drawn based on the regression equation, the coefficient of determination (r2) and P values, as an evaluation of the growth performance and tibia indicators of indicators better than other indicators. Add to exceed 900U/kg phytase can avoid phosphorus deficiency caused by leg problems (3) low phosphorus diets. Dietary available phosphorus level of 0.39% (0-14d) and 0.34% (15-35d) to meet the need of the duck phosphorus nutrition, growth performance to normal levels, and the apparent utilization of phosphorus, reducing phosphorus emissions , so that the effective use of the dietary phosphorus best.
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