Free Mp3 Ringtones

[defgf24uw]

Heat Stress and Layers


Energy intake of chicken (Okumura pure city, l993). 1.7 egg production and eggshell quality decline in feed intake of heat stress so that after the consumption of chicken will be body fat, a source of energy required to break the chicken 3-7 days later, led to decreased egg production rate, while feeding less because Eggs are small. Thus the total drop in egg production. Bond reported that the ambient temperature from 2FC rose to 38C,[link widoczny dla zalogowanych], Leghorn 79 egg-laying rate fell to 4l, egg weight to reduce animal ecology 18 20; Valendia and other findings. Laying rate of under 32 ℃ 21 ℃ lower than the 7.4 Darid statistics, starting from the white rose 21 ℃ 1 ℃, egg production declined 0.5} 25-30 ℃ asked, each increase of 1 ℃, egg production declined by 1.5, eggs, reduced the weight of 0.3 g / a} above 30 ℃,[link widoczny dla zalogowanych], egg production declined sharply. Li Yun Chung et al (1986) reported that the ambient temperature rose from 16.7 ℃ 32.2 ℃, Air chicken egg unsolicited 72.11 down to 66.18 rate, egg weight,[link widoczny dla zalogowanych], eggshell strength were significantly decreased egg deformity increased. The high temperature caused eggshell quality decline, has become a commodity egg production of a major problem. Goto and so that business interests and the egg industry issues related to the shell is rough and translucent spot bar, rough with increasing the growth of months. The main component of eggshell calcium carbonate, carbonic anhydrase within the uterus (cA) for the activity will affect the amount of carbonate ions to form an eggshell, eggshell quality chicken, uterine activity was higher in the CA but the hens in the 32 .2 ℃, the shell of the egg, whether smooth or rough, eggshell thickness decreased, 32.2 ℃ 21.1 ℃ while the decline in over 11. Mueller and other reports, the hen moved from 13 ℃ 34 ℃, the eggshell thickness decreased by 13, at 2 weeks of high temperature treatment, the first day of that eggshell thinning, eggshell sustained yield rough, the roughness and thickness of the negative correlation (r eleven 0.64). Heat stress to the shell of the protective film modification, calcium deposits loose, irregular, cylindrical arrangement and lack of normal development of cavity. Summer due to temperature rise, increased enzyme activities inside the eggs, breaking it down to strengthen the role of egg to make egg mass index (Haugh units) decline. In addition, due to emission of soft chicken manure and water samples will be increased around the cloaca of chicken manure increased adhesion, increased soiled eggs. 1.8 even when the production interval of heat stress, layer each with 2 eggs, producing prolonged interval. Tathagata Air chicken production in the 322'C intervals even under 27.7 hours, and at 25 ℃ and 25.6 hours. The two temperatures postpartum ovulation and the time to reach the uterus through the fallopian tubes had no difference (slaughtering results). Therefore, the eggs stay in the womb of time to high temperature for long, egg weight and eggshell quality decline to reduce speed through the fallopian tubes can not be explained. Even the production period in the afternoon laying an egg to the birth interval longer. 1.9 Fall of weakness in summer (especially the original weight of the small, weak) chicken, into the post even though the temperature was decreased appetite recovered,[link widoczny dla zalogowanych], but still can not quickly return to the original egg production rate, combined with respiratory disease, access to molt period, a lot of chicken so to be eliminated (Akira Fujita, second, 1989). 2, the mechanism of heat stress of egg laying rate decreased during heat stress. Smaller egg, may be due to reduced feed intake, energy,[link widoczny dla zalogowanych], protein, minerals and vitamins such as inadequate intake. High temperature can also reduce blood flow through the follicle directly to drop in egg production (such as heat stress at night.) High temperature weight loss, loss of body fat a lot, so a lot of egg yolk fat smaller reduction than the protein is more serious. It reduced the weight of the egg yolk and not enough lipid synthesis is related to reduced secretion of thyroid heat stress, also caused decline in egg production and eggshell quality, fed by the hot season of thyroid protein can increase the proportion of egg production and egg removal} thyroid chicken, egg production declined sharply. Decline in the quality of heat stress so that the shell can be explained as follows: high blood calcium levels decreased significantly, but the serum calcium level of poor eggshell quality decline is one of the reasons, it seems not the main reason. More reasonable explanation is this: when the blood flow out weeks of heat stress, a corresponding reduction in uterine blood flow, accompanied by a decline in serum calcium levels, the combined effect of sources of raw materials to form eggshells. In addition, the high temperature drop of blood in the partial pressure of CO is one of the causes eggshell thinning, eggshell gland can be used for the formation of CO as a raw material for the shell. 2 Tianyun Bo heat stress in summer and 493 in layers of heat stress mitigation measures 3.1 layers reduce the temperature inside the chicken coop automatic spray device available, the use of water, gasification direct cooling air inside the chicken coop, facilities , the chicken body. Fine fog spray only will breed bacteria and mold, it should be added to disinfect drug injection per IO0m 27.5 liters of water, can reduce Sherwin 3UC of 4.5 ℃. Do not water at midday when the temperature should start rising Sherwin until the temperature drops 9:00
More articles related to topics：


[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]