Different Forced Molting Laying Hen Production Performance, The Impact Of Blood Biochemical Parameters And Tissue And Organ Mineral Content

Effect of Different Method of Forced Molting on Performance, Blood Biochemical Index and Mineral Content of Tissues in laying hens Abstract: Method of forced molting is a important raising measure on poultty enterprise. It consists of method of hungiy control body weight, high Zinc diet, high Iodine diet, low-Calcium low-sodium diet, hormone diet and method of mixed etc. It has important meaning in improving economic benefit of poultry enterprise. Nine hundred sixty commercial laying hens which were sixty-five eek-old and 52.3% rate of laying were divided into four groups randomly. There were four replications every group and sixty laying hens every replication. Four groups were named A(control), B, C, 1) and took the method of hungry, control body weight, high znic diet (2% znic oxide) and low-calcium low-sodium diet (Ca: 0.090/o, Na: 0.027%) respectively. The course of experiement included two stages, the first stage named as molting period (63 days) and the second stage named as investigating period (180 days). Egg weight, feed intake, egg production, broken and soft eggs and mortality were determined every day. When molting period ending, twelve laying hens were killed every group. Their blood were collected and used as determining blood biochemical index include serum LDH, SOD, OPT, GOT, ALP, GULl, TP, UA, CHO, TO, Ca~and P1. Their tibia, liver, heart and muscle were taken and used as determing znic, calcium, phosphorus and sodium content of these tissues. All data were analysed with SAS. The result showed that rate of molting mortality of B and C group decreased significantly (p<0.05). Zinc content of tibia and liver of C group increased high significantly (p