石粉粒度与饲喂时间对蛋壳质量及其超微结构的影响

选用２８８只５６周龄种禽褐蛋鸡,随机分为６组,分别给予３种日粮处理,即在玉米一 豆粕型日粮中分别以２５％、５０％和７５％２ ５～３．２ｍｍ石粉与０．１～０ ．５ｍｍ石粉混合,２种饲喂 方式,即一种为２．５～３．２ｍｍ石粉与０．５～０．１ｍｍ石粉混合到日粮中全天饲喂;另将 ２．５～３．２ｍｍ石粉于每日下午４：００～４：３０单独加入槽中饲喂,试验期８周．结果表明：石粉粒度 与饲喂时间对蛋壳强度有显著影响（Ｐ＜０．０５）,对破软蛋率及蛋壳乳头体直径与密度有极显著 影响（Ｐ＜０．０１）     

“双低”菜籽粕对蛋鸡生长发育及靶器官的影响

选７周龄６００只罗曼蛋鸡随机均分５组，试验３组分别饲喂１０％，１５％，２０％“双低”菜籽粕日粮，对照２组分别饲喂全豆粕、８％普通采籽粕日粮，试期１３周（８～２０周龄鸡）。结果表明，１０％，１５％“双低”菜籽粕日粮对蛋鸡生长发育、饲料增重比、甲状腺及血清Ｔ＿３，Ｔ＿４，ＴＳＨ，Ｔ＿Ｇ，Ｔ＿Ｍ浓度、肝脏及血浆ＣＨＥ，ＧＯＴ，ＧＤＴ，ＡＫＰ活性无不良影响（Ｐ＞０．０５）；２０％“双低”菜籽粕日粮组鸡表现明显的生长抑制（Ｐ＜０．０５）．甲状腺肿大４４．２％（Ｐ＜０．０１），Ｔ＿３下降１６．３％（Ｐ＜０．０５），Ｔ＿Ｇ上升５４．５％（Ｐ＜０．０１），肝出血明显，血浆中ＧＰＴ，ＧＯＴ升高（Ｐ＜０．０５）     

饲粮中不同钙、磷比例对肉用仔鸡骨骼的影响

将肉用仔鸡分为１０组，第１～５组饲粮中含钙１％，含有效磷胡应为０．１％，０．３％，０．５％，０．７％，０．９％；第６～１０组含有效磷０．５％，０～２８日龄，含钙量相应为０．４％，０．７％，１％，１．３％，１．６％，３５～４２日龄时，含钙量相应为０．４％，０．７％，１．９％，１．３％，１．６％。结果表明：磷含量最低的第１组增重、胫骨灰分、胫骨总钙与总磷显著低于其余组，而料肉比、腿病发生率及死亡率比其余组高；钙与有效磷比例接近１的组，腿病发生率仅次于严重缺磷组。     

饲粮中不同钙,磷比例对肉用仔鸡骨骼的影响

将肉用仔鸡分为１０组，第１－５组饲糖中含钙１％，含有效磷相应为０．１，０．３％．０．５％，０．７％，０．９％；第６－１０组含有效磷０．５，０－２８日龄，含钙量相应为０．４％，０．７％，１％，１．３％，１．６％，３５－４２日龄时，含下量相应为０．４％，０。７％，１．９％，１．３％，１．６％。结果表明，磷含量最低的第１组增重、胫骨灰分、胫骨总钙与总磷显著低于其余组，而料肉比、腿病发生率及死亡率比其余组     

部分添加颗粒状石粉对高龄蛋鸡的影响

本试验比较了部分添加粗石粉与全部用细石粉的饲料对高龄蛋鸡生产性能的影响。结果表明,高龄蛋鸡部分使用颗粒状石粉组比全细石粉组饲料耗减少１３．０９％（Ｐ〈０．０１）,对其他产蛋指标没有显著影响;试验组有机物质和磷的利用率比对照组高２．８７％和２６．８５％（Ｐ〈０．０５）,对其他营养物质的代谢率没有显著影响。     

短角牛改良秦川牛效果研究

比较了１２月龄的短秦Ｆ＿１、短秦Ｆ＿２和秦川牛各４头阉牛的体尺、体重变化及屠宰性能指标，结果表明：导入短角牛可使秦川牛后躯发育不良之缺陷得到纠正，腰角宽增加６６．３７％～６８．５２％（Ｐ＜０．０１），髋宽增加８．７５％～１１．５８％（Ｐ＜０．０５），体重也明显增加（４．１７％～６．５１％，Ｐ＜０．０１）；屠宰率、净肉率、肉骨比、眼肌面积和眼肌重等５项指标分别提高８．６６％～９．０１％（Ｐ＜０．０１）、５．２３％～７．６６％（Ｐ＜０．０１）、７．２３％～４７．０９％（Ｐ＜０．０１）、２７．１４％～２８．７７％（Ｐ＜０．０１）和４３．２６％～４８．８８％（Ｐ＜０．０５，Ｐ＜０．０１），并使其胴体的前、后肢及体躯三部分产肉量占胴体总产肉量的比例得以优化，但肉质组成差异不大。改良效果短秦Ｆ＿１优于短秦Ｆ＿２。     

羟基脲致“阳虚”大鼠代谢变化的实验研究

目的：用羟基脲制造ＳＤ大鼠“阳虚”模型,以探讨其对体内代谢的影响。方法：３月龄雄性ＳＤ大鼠１６只,随机分为对照（Ａ）组和羟基脲（Ｂ）组,每组８只。Ａ组：灌喂生理盐水２ｍＬ／ｋｇ,每周６次;Ｂ组：灌喂羟基脲混悬液２．５ｇ／ｋｇ,每周３次。在处死大鼠前第１０天和第２天分别给其皮下注射盐酸四环素（２５ｍｇ／ｋｇ）。３个月后,取血清送中心实验室进行检测;取内脏称重;取胫骨中段行不脱钙骨包埋,锯片和磨片,再用半自动图象数字化分析仪（美国）对其皮质骨的骨组织作静态和动态测量及计算。结果：与对照组比较,羟基脲组的体重减少了１２．５％（Ｐ＜０．０５）;腓肠肌重量减少了１０％（Ｐ＜０．０５）,内脏重量减轻,肝、肺和睾丸的重量分别减少了１２．５％（Ｐ＜０．０５）,３２．８％（Ｐ＜０．０５）和４８．２％（Ｐ＜０．０５）;微量元素中Ｃｕ含量增加２２．９％（Ｐ＜０．０５）,Ｔ４增加了８１．４％（Ｐ＜０．０５）;胫骨中段的皮质骨减少７％（Ｐ＜０．０５）,骨髓腔增加２８％（Ｐ＜０．０１）。结论：羟基脲可使动物出现虚损表现和导致骨质疏松。     

短角牛改良秦川牛效果研究

比较了１２月龄的短秦Ｆ１、短秦Ｆ２和秦川牛各４头阉牛的体尺、体重变化以及屠宰性能指标，结果表明：导入短角牛可使秦川牛后躯发育不良之缺陷得到纠正，腰角宽增加６６．３７％￣６８．５２％（Ｐ〈０．０１），髋宽增加８．７５％￣１１．５８％（Ｐ〈０．０５），体重也明显增加（４．１７％￣６．５１％，Ｐ〈０．０１）；屠宰率、净肉率、肉骨比、眼肌面积和眼肌重等５项指标分别提高８．６６％￣９．０１％（Ｐ〈０．０１）     

混和酶制剂对丝毛乌骨鸡生长速度和饲料利用及养分消化率的影响

取２００羽１日龄丝毛乌骨鸡［始重（２４．７５±２．６６）ｇ］，随机分成试验１、２、３、４组和对照组，分别饲喂含中性蛋白酶、糖化酶及不含酶制剂的基础日粮，饲养试验在６０日龄结束．分别在３１日龄和６１日龄开始时对生长性能最佳试验组和对照组的鸡进行消化试验，并测定血液生化指标．结果表明：①日粮中添加混和酶制剂能提高日增重、降低料重比，其中以试验２组最佳，３０日龄时平均日增重提高２５．２８％（Ｐ＜０．０１），料重比降低１５．９２％．６０日龄时平均日增重提高８．５４％（Ｐ＜０．０５），料重比下降１０．７３％；②使用混合酶制剂可不同程度地提高饲料养分的表观消化率，试验２组鸡３７、６７日龄的干物质、粗蛋白、粗脂肪、无氮浸出物消化率分别提高了３．０５％（Ｐ＜０．０１）、７．２４％（Ｐ＜０．０５），７．６８％（Ｐ＜０．０５）、９．８２％（Ｐ＜０．０５），１２．７０％（Ｐ＜０．０１）、１３．９４％（Ｐ＜０．０１），５．４７％（Ｐ＜０．０１）、６．９０％（Ｐ＜０．０５）；③混合酶制剂对３７日龄和６７日龄丝毛乌骨鸡血糖、血清总蛋白无显著影响．     

膳食中添加骨糊对大鼠钙磷吸收和骨质的影响

畜禽骨骼中含丰富的蛋白质和矿物质元素，尤其钙的含量高，钙磷比值适宜。本实验用新鲜猪长骨和肋骨，经破碎、研磨制成鲜骨糊，再经烘干、碾细、制成骨糊粉，添加到膳食中。实验动物选用Ｗｉｓｔａｒ刚断乳的雄性大白鼠２８只，按体重配对随机分成四组。实验期４周。实验表明，低钙膳食中添加骨糊，可显著增加肠钙吸收量（Ｐ＜０．０５），提高股骨灰分绝对含量（Ｐ＜０．０１）、骨矿盐含量（Ｐ＜０．０１）和骨矿盐密度（Ｐ＜０．０５）。     

吉富罗非鱼饲料钙磷比研究

【目的】探讨饲料钙磷比(质量比)对吉富罗非鱼生长、饲料利用、磷表观消化率、体成分、骨组织无机物含量、血清生化指标的影响,确定吉富罗非鱼饲料中适宜的钙磷比。【方法】以磷酸二氢钾为磷源、氯化钙为钙源,分别配制等磷（总磷为9～10 g/kg）、等氮、等能、钙磷比理论值分别为2∶1,1.5∶1,1∶1,1∶1.5,1∶2和1∶3（实测值分别为1.8∶1,1.3∶1,1∶1.1,1∶1.5,1∶2.5和1∶2.9）的6组纯化饲料,用之饲养吉富罗非鱼（初始体质量为(46.03±2.14) g/尾）8周,每组设3个重复,测定其体质量增加率、饲料系数、磷表观消化率、体成分、骨组织无机物含量、血清生化指标等。用折线模型分别对供试罗非鱼的特定生长率、全鱼磷含量、脊椎骨磷含量和血清磷含量与饲料钙磷比水平进行相关分析,确定饲料中钙磷比的适宜水平。【结果】钙磷比为1∶1.1～1∶2.9的试验组鱼体质量增加率和特定生长率均显著高于钙磷比1.8∶1组(P＜0.05);钙磷比1∶2.5组的饲料系数显著低于1.8∶1组(P＜0.05),但与其他各组间无显著差异(P＞0.05);钙磷比1∶2.5组的磷表观消化率显著高于1.8∶1组、1.3∶1组和1∶2.9组(P＜0.05),但与1∶1.1组和1∶1.5组无显著差异(P＞0.05);饲料钙磷比对吉富罗非鱼的脏体比、肝体比、肥满度及成活率均无显著影响(P＞0.05)。随着饲料钙磷比的下降（钙水平的降低）,全鱼和脊椎骨的钙、磷含量均呈先升高后降低的趋势(P＜0.05),肌肉的粗脂肪含量呈升高趋势(P＜0.05),而全鱼和脊椎骨的粗灰分含量及Ca/P值均无显著变化(P＞0.05)。血清磷含量随饲料钙磷比的下降呈升高的趋势(P＜0.05),饲料钙磷比对血清钙含量无显著影响(P＞0.05);血清碱性磷酸酶活力和甲状旁腺激素含量均随饲料钙磷比的下降呈先升高后降低的趋势(P＜0.05),血清总胆固醇和甘油三酯的含量随饲料钙磷比的下降均呈先降低后升高的趋势(P＜0.05)。【结论】吉富罗非鱼要获得最大的特定生长率、全鱼磷含量、脊椎骨磷含量和血清磷含量,其饲料中最适钙磷比分别应为1∶1.5,1∶1.1,1∶1.1和1∶2.4,据此建议在饲料总磷水平为9～10 g/kg时,吉富罗非鱼饲料中钙磷比的适宜水平为1∶1.1～1∶1.5。     

杨树皮类脂与中草药复配制剂对蛋鸡生产性能的影响

由20%杨树皮类脂与80%中草药添加剂(成分为:益母草40%、杜仲20%、蒲公英10%、黄芪30%)组成复配制剂,研究该复配制剂对罗曼蛋鸡蛋重、产蛋率和产蛋量等生产性能的影响。结果表明:复配制剂添加量为0.05%时,蛋鸡的平均产蛋率和平均产蛋量与对照组无显著差异(P0.05);添加量为0.10%时,蛋鸡的生产性能虽然与对照组无显著差异(P0.05),但平均产蛋量有增加的趋势;添加量为0.15%时,蛋鸡平均产蛋率与对照组无显著差异(P0.05),但蛋重显著上升(P0.05),平均产蛋量显著提高(P0.05);添加量继续增加至0.20%,蛋鸡平均产蛋率显著提高(P0.05),蛋重显著减小(P0.05)。因此,以降低蛋重为目的,杨树皮类脂复配制剂在饲料中的适宜添加量为0.20%。     

添加木聚糖酶和植酸酶对蛋鸡生产性能和胫骨矿质化的影响

选择28周龄商品代‘罗曼’蛋鸡840只,采用单因子分组试验设计随机分为5组,每组8个重复,每个重复21只鸡,分别接受正对照(Ⅰ)、负对照(Ⅱ)、负对照+植酸酶60g.t-1+木聚糖酶200g.t-1(Ⅲ)、负对照+植酸酶60g.t-1+木聚糖酶350g.t-1(Ⅳ)和负对照+植酸酶60g.t-1+木聚糖酶500g.t-1(Ⅴ)5个试验处理,研究2种酶合用对蛋鸡生产性能及胫骨矿质化的影响.结果表明:与Ⅱ组相比,添加植酸酶与木聚糖酶后使Ⅲ、Ⅳ、Ⅴ组入舍母鸡产蛋率、入舍母鸡产蛋质量和胫骨灰分含量等指标显著提高(P0.05),死淘率和破汤蛋率显著降低(P0.05),耗料量呈下降趋势;各组蛋质量、蛋形指数、哈氏单位、蛋壳强度、蛋壳厚度、单位面积蛋壳质量及蛋壳率等指标都在正常范围;50周龄时Ⅲ组蛋壳强度显著低于Ⅰ组(P0.05),Ⅳ组蛋壳率显著低于Ⅰ组(P0.05),Ⅰ、Ⅱ组蛋壳厚度显示有高于Ⅲ、Ⅳ、Ⅴ的趋势.     

Nonphytate Phosphorus Requirement and Efficacy of a Genetically Engineered Yeast Phytase for Yellow Broilers at 22- to 42-d-Old Age

An experiment was conducted to investigate the requirement of nonphytate phosphorus (OP) and efficacy of a genetically engineered yeast phytase (PHY A) for Lingnan yellow broilers from 22- to 42-d-old age. A total of 1320 1 -d-old male chicks were randomly divided into 11 dietary treatment groups, which consisted of 4 replicate floor pens with 30 birds per pen.The control group (treatment 1) was fed with basal diet of nPP 0.08% without dicalcium phosphate or phytase supplementation. Dietary levels of nPP were 0.16, 0.24, 0.32, 0.40, 0.48, and 0.56%, respectively, for treatments 2 to 7,through addition of dicalcium phosphate (chemistry grade) to the basal diet. Diets of treatments 8 to 11 were supplemented with PHY A at 200, 400 and 600 U kg-t, a commercial phytase product (PHY B) at 400 U kg-1 level, respectively. The birds in 0.32-0.56% nPP groups gained more than those of the other groups (P<0.05). The nPP supplementation significantly improved feed intake (P<0.05). The feed gain ratio was significantly decreased by 0.40% nPP diet compared to the control birds (P<0.05). The level of 0.48% nPP was required for optimum tibia development. The additions of PHY A at 400 and 600 U kg-1 level and PHY B all significantly improved ADG (P<0.05), ADFI (P<0.05), and dry defatted tibia weight (P<0.05).Similarly, the percentage of tibia ash was increased by 600 U kg-1 PHY A supplementation (P<0.05). The requirement of nPP for maximal ADG and highest percentage tibia ash both was 0.40%. The phosphorus equivalency value of PHY A was estimated as 685 U kg-1 for male yellow broilers of 22- to 42-d-old age.     

不同钙磷水平对五龙鹅生产性能及血浆和胫骨生化指标的影响

选用1日龄健康五龙鹅雏,采用4×2二因子设计研究饲粮中不同钙磷水平对0～4周龄五龙鹅生产性能、血浆钙磷含量和碱性磷酸酶(AKP)活性以及胫骨灰分及钙磷含量的影响.结果表明:①不同钙水平对五龙鹅体增重及料重比影响显著(P＜0.05);对饲料消耗影响极显著(P＜0.01);饲粮钙水平为0.65%时的体增重最高,料重比最低,饲料消耗最高;不同磷水平对体增重、饲料消耗影响显著(P＜0.05),但对料重比无影响;钙磷间的交互作用对体增重、饲料消耗及料重比影响显著(P＜0.05).②不同钙水平对血浆钙含量影响极显著(P<0.01),当饲粮钙水平为0.65%时血钙最高,对血浆磷含量影响不显著(P>0.05),对血浆AKP活性影响显著(P<0.05),以0.65%钙水平的AKP活性最低;不同磷水平对血浆钙含量影响显著(P<0.05),对血浆磷含量影响极显著(P<0.01),对血浆AKP活性影响不显著(P>0.05);钙磷间的交互作用对血浆钙磷水平及AKP活性影响极显著(P<0.01).③不同钙水平对胫骨粗灰分及钙含量影响显著(P<0.05),以0.65%钙水平时的灰分及钙含量最高,对胫骨磷含量影响不显著(P>0.05);不同磷水平对胫骨粗灰分含量影响极显著(P<0.01),对胫骨钙磷含量影响显著(P<0.05);钙磷互作对胫骨灰分及钙磷含量影响极显著(P<0.01).     

Effect of dietary calcium or phosphorus deficiency on bone development and related calcium or phosphorus metabolic utilization parameters of broilers from 22 to 42 days of age

This experiment was conducted to investigate the effect of dietary calcium (Ca) or phosphorus (P) deficiency on bone development and related Ca or P metabolic utilization parameters of broilers from 22 to 42 days of age based on our previous study, which indicated that dietary Ca or P deficiency impaired the bone development by regulating related Ca or P metabolic utilization parameters of broilers from 1 to 21 days of age. A total of 504 one-day-old Arbor Acres male broilers were randomly assigned to 1 of 4 treatments with 7 replicates in a completely randomized design, and fed the normal control and Ca- or P-deficient diets from 1 to 21 days of age. At 22 days of age, the broilers were further fed the normal control diet (0.90% Ca+0.35% non-phytate P (NPP)), the P-deficient diet (0.90% Ca+0.18% NPP), the Ca-deficient diet (0.30% Ca+0.35% NPP) or the Ca and P-deficient diet (0.30% Ca+0.18% NPP), respectively. The results showed that dietary Ca or P deficiency decreased (P<0.05) tibia bone mineral density (BMD), bone breaking strength (BBS), ash content, tibia ash Ca content and serum P content on days 28 and 42, but increased (P<0.05) tibia alkaline phosphatase (ALP) activity of broilers on day 42 compared with the control group. Furthermore, the broilers fed the P-deficient diet had the lowest (P<0.05) tibia BMD, BBS, ash content, serum P content and the highest (P<0.05) serum Ca content on day 28 compared with those fed the Ca-deficient or Ca and P-deficient diets. The results from the present study indicated that the bone development and related Ca or P metabolic utilization parameters of broilers were the most sensitive to dietary P deficiency, followed by dietary Ca deficiency or Ca and P-deficiency; dietary Ca or P deficiency impaired the bone development possibly by regulating serum Ca and P contents as well as tibia Ca content and ALP activity of broilers from 22 to 42 days of age.     

日粮非植酸磷和基因工程酵母菌植酸酶水平对22～42日龄黄羽肉鸡生长和胫骨发育的影响

 【目的】研究确定22～42日龄黄羽肉鸡非植酸磷（NPP）的需要量及毕赤酵母基因工程菌植酸酶（PHY A）的磷当量值。【方法】选用22日龄岭南黄羽肉公鸡1 320只,随机分为11个处理,每处理4个重复,每重复30只鸡。处理1为基础日粮（NPP水平为0.08%）,不添加磷酸氢钙和植酸酶;处理2～7在基础日粮中分别添加不同水平化学纯磷酸氢钙,日粮NPP水平分别为0.16%、0.24%、0.32%、0.40%、0.48%、0.56%;处理8～11在基础日粮中分别添加200、400、600 U&#8226;kg-1PHY A、400 U&#8226;kg-1美国进口植酸酶产品（PHY B）。【结果】肉鸡日增重随日粮NPP水平升高而增加,0.32%～0.56%组平均日增重显著高于对照组和0.16%组（P＜0.05）,0.48%组日增重最大;添加磷组肉鸡采食量显著高于对照组（P＜0.05）;0.40%组料重比最低,显著低于对照组（P＜0.05）;随日粮NPP水平升高肉鸡胫骨脱脂干骨重、干骨中磷含量和灰分中磷含量均显著升高,0.48%组达到最高,显著高于对照组、0.16%和0.24%组（P＜0.05）,添加磷组干骨中钙含量与灰分含量显著高于对照组（P＜0.05）。添加400、600 U&#8226;kg-1 PHY A和400 U&#8226;kg-1 PHY B显著提高了日增重、采食量和胫骨脱脂干骨重（P＜0.05）,添加2种植酸酶均显著提高了胫骨干骨中钙、磷含量与灰分中磷含量（P＜0.05）,添加600 U&#8226;kg-1 PHY A显著提高了干骨中灰分含量（P＜0.05）。【结论】22～42日龄满足黄羽肉鸡最佳生长和骨骼发育的NPP需要量为0.40%,PHY A的磷当量为685 U&#8226;kg-1。     

玉米型日粮与小麦型日粮饲喂蛋鸡效果比较试验

试验旨在研究用小麦完全代替日粮中的玉米后饲喂产蛋鸡的效果,以评估小麦用作蛋鸡能量饲 料的可行性。试验采用对比试验设计,选用尼克红蛋鸡180只,随机分为两个组,每组3个重复,每个重 复30只蛋鸡。一组为对照组．另一组为处理组,分别饲喂玉米--豆粕型日粮和小麦--豆粕型日粮。结果 表明,在蛋鸡日粮中用小麦完全代替玉米后,产蛋率降低1．9%,产蛋量降低1．06枚/只,异软蛋率提高 0．09％,采食量提高1．04(g/只·d),料蛋比提高0．09,均差异显著(p<0．05);破蛋率提高0．33％,平均蛋重降 低0．54％,但差异不显著(P>0．05)。从营养物质的消化率考虑,小麦型日粮表观能量的利用率和蛋白质的 表观消化率与玉米组相比均降低了,但均差异不显著(p>0．05)。从经济效益考虑,小麦型日粮的饲料成本 虽然降低了,但其他指标均不如玉米组,且产蛋成本增加了0．01元/kg。     

Effects of Fermentation Product Containing Phytase on Productive Performance,Egg Quality,and Phosphorous Apparent Metabolism of Laying Hens Fed Different Levels of Phosphorus

This study investigated the effects of fermentation product containing phytase （FPP） that was fermented using waste vinegar residue （WVR） as substrate from Aspergillusficuum NTG-23 on productive performance, egg quality, and phosphorus apparent metabolism of laying hens. First, 375 22-wk-old Jinghong hens were allocated into 5 treatments （5 replicates of 15 hens each） in an 8-wk experiment for evaluating the parameters of productive performance, egg quality, serum, and tibia. Experimental diets contained 4% FPP and 96% corn-soybean diet. The levels of dicalciurn phosphate （DCP） were 1.34, 1.01, 0.67, 0.34 and 0%. Next, thirty 31-wk-old Jinghong hens were fed 5 types of diets for evaluating phosphorous apparent metabolism rate. Egg productive rate, egg weight, feed conversion ratio, Haugh unit, egg albumen height, serum calcium, tibia ash, tibia ash calcium and tibia breaking strength were not different significantly among 5 treatments. The significant difference of average daily feed intake was not appeared when the DCP content of corn-soybean-FPP diet was reduced to 0.67%; the eggshell hardness, eggshell thickness and serum phosphorus were not reduced significantly until the DCP content of corn-soybean-FPP diet was reduced to 0.34%. The yolk color was improved when the laying hens fed deficient DCP corn-soybean-FPP diet. A 22.14% reduction in excreta phosphorus was observed when the laying hens fed low phosphorus （0.67% DCP） corn-soybean-FPP diet. A 30% elevation of phosphorus apparent metabolism rate was obtained when the DCP content of corn-soybean-FPP diet was decreased from 1.34 to 1.01%. The reducing cost of layer diet was totalized about 120 CNY 1000 kg1 diet when the content of DCP was 0.67% in corn-soybean-FPP diet. These results indicated that FPP could be applied in laying hen as a potential, cost-effective and rational application of WVR.