RU2370099C1 - Method of egg production increase of laying hens - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention refers to the poultry feeding. The method includes giving combined feed, containing wheat, barley, sunflower cake, soybean meal, fish flour, vegetable oil, corn, mill offals, limestone, monocalcium phosphate, premix, at the same time cadmium sulphate is fed additionally to the basic diet, within the period from 14 to 16 weeks of life, in a dose of 40 mg per kg of combined feed.

EFFECT: invention enables to increase egg production of laying hens.

1 dwg, 2 tbl

Description

The invention relates to the field of agriculture and can be used in the feeding of poultry (in particular, laying hens).

There is a method of increasing the egg productivity of laying hens by additional daily feeding of cadmium in quantities exceeding the maximum allowable 5 and 10 times (Matiosov A.D.The effect of lead and cadmium on the biochemical parameters and productivity of laying hens / Abstract of diss. Cand. Biol Science. - Tomsk, 2004 .-- 22 p.).

The disadvantage of this method is the short duration of the effect of stimulation of egg productivity, due to the toxic effect of cadmium on the body of a bird.

EFFECT: increased egg productivity of laying hens.

The problem is solved in that in the known method, which includes providing mixed feed containing wheat, barley, sunflower meal, soybean meal, fish meal, vegetable oil, corn, bran, limestone, monocalcium phosphate, premix, increasing the productivity of laying hens is achieved by that cadmium sulfate is additionally fed during the period from the 14th to the 16th week of life at a dosage of 40 mg / kg of feed.

It is known that chickens that started too early to hatch have a low egg laying intensity at the peak and stop egg laying relatively quickly (VNITIP. Improving the quality of eggs. - Sergiev Posad, 1999. - 30 p.). An analysis of the data obtained as a result of the studies shows that feeding cadmium sulfate during the end of the growth period and the beginning of the pre-laying helps to restrain the onset of egg laying, which, in turn, leads to an increase in egg production during the period of intensive egg laying.

The drawing shows a graphical dependence of the intensity of oviposition in the experimental groups, the difference relative to the control in%.

The method is implemented as follows. Bird grown in accordance with the recommendations (VNITIP. Guidelines for working with the cross-country bird "Rodonit" // I.A. Egorov, I.P. Krivoshipin, A.Sh. Kavtarashvilli, etc. Under the general editorship of V.I. Fisinin, N.N.Shabetova. - Sergiev Posad, 1998. - 39 pp.), Is contained in compound feed (Table 1) with the additional inclusion of 40 mg of cadmium sulfate per kg of compound feed in the period from the 14th to the 16th week of life.

Table 1
Composition and nutritional value of feed, g / kg Indicator Feed content The composition of the feed: wheat 400 barley 300 bran thirty corn 40 vegetable oil twenty fish flour fifty sunflower meal 70 soybean meal fifty limestone twenty premix 10 monocalcium phosphate 10 The feed contains: exchange energy, MJ 11.0-11.3 crude protein 150-166 raw fat 47.7 crude fiber 42-50

The experiment was conducted in the conditions of the experimental biological clinic (vivarium) of the Orenburg State University on laying hens of the final cross-country Rodonit, which, at the age of eight weeks, were divided into 4 groups using the analogue method (n = 20). Up to 12 weeks of age, the bird was in the conditions of the preparatory period of the experiment. Starting from 14 weeks of age, laying hens were transferred to the reference period of the experiment, during which the bird of the control group was kept on the main diet (the nutrient content in the feed complies with the recommendations (VNITIP. Guide to work with the cross-country bird "Rodonit" // I. A.Egorov, I.P. Krivoshipin, A.Sh. Cavtarasvilli, etc. Under the general editorship of V.I. Fisinin, N.N. Shabetova. - Sergiev Posad, 1998. - 39 p.)), Bird of the I experimental group for 2 weeks in addition to the main diet received 40 mg (toxicity threshold) of cadmium sulfate per g feed (.. The need poultry nutrient / Translated from English Shchennikova IV and OV Lischenko, 1997. - M .: Ear, 2000. - 255 p.). Poultry of the experimental group II received 2 mg of cadmium sulfate per kg of feed for 2 weeks, and the experimental group 3 received 2 mg of cadmium sulfate per kg of feed in 2 weeks in addition to the main diet. In the process of research, the number and weight of eggs laid by the bird were taken into account daily, which made it possible to determine the main indicators of bird egg productivity. Evaluation of the qualitative characteristics of egg productivity was carried out according to the methodology of Yu.M. Vladimirimirova, A.M. Sergeeva (Vladimirova Yu.N., Sergeeva AM Methods of morphological and physico-chemical analysis of eggs. - M .: Rosselkhozizdat, 1967. - 26 pp.) .

The results were statistically processed using a personal computer, while the arithmetic mean value, the arithmetic mean error and the standard deviation were determined. To identify statistically significant (significant) differences, Student's criterion was used. The differences were considered reliable when the error probability level was no higher than 5% (P <0.05) (Lakin G.F. Biometrics. - M.: Higher school, 1990. - 352 p.).

Our studies have shown that the inclusion of 40 mg of cadmium sulfate per kg of feed in the specified period leads to an increase in egg productivity by an average of 20.7% (P≤0.01), which is most pronounced during the period from 22 to 54 weeks of life of chickens layers, which is graphically confirmed in the drawing. The number of eggs in the II and III experimental groups in the indicated period also increased on average by 3.9 and 6.8%, respectively, relative to the control, but these changes were not significant.

So, laying hens of the control group began to rush at 16 weeks of age. Feeding cadmium sulfate I to the experimental group delayed the onset of oviposition by 1 week. In the II experimental group, the bird began to lay eggs similarly to the control group, the bird of the III experimental group at the age of 15 weeks.

The inclusion of cadmium sulfate in the bird food of the experimental group contributed to an increase in the average egg mass (Table 2).

table 2
The average egg mass in groups, g Group Age weeks 15-21 22-54 55-57 Control 47.31 ± 2.02 62.91 ± 0.78 64.48 ± 1.18 I experienced 50.18 ± 1.67 66.37 ± 0.86 ** 64.68 ± 2.82 II experienced 46.01 ± 2.16 64.84 ± 1.45 65.51 ± 1.75 III experienced 45.12 ± 2.07 63.39 ± 1.78 61.21 ± 1.31 Note: ** - P≤0.01.

So, this indicator in the I experimental group in the period from 22 to 54 weeks exceeded that in the control by 5.5% (P≤0.01). In the II and III experimental groups, the average egg mass during the experiment during this period also exceeded the control indicator by 3.1 and 0.7%, respectively, but this difference was not significant.

Thus, in comparison with the prototype, feeding laying hens 40 mg of cadmium sulfate in addition to the main diet in the period from 14 to 16 weeks of life helps to increase the duration of the stimulation effect.

Claims (1)

A method of increasing the productivity of laying hens, including giving mixed feed containing wheat, barley, sunflower meal, soybean meal, fish meal, vegetable oil, corn, bran, limestone, monocalcium phosphate, premix, characterized in that cadmium sulfate is fed in addition to the main diet in the period from 14 to 16 weeks of life in a dosage of 40 mg per kg of feed.