Monbelyard zotli sigirlarning nasl qiymatini baholash

Annotatsiya: Chetdan olib kelingan sigirlardan xo‘jalikda unumli foydalanishga ulardan laktatsiyalar davomida olinadigan sut miqdorining oshishi bilan birga ko‘plab yuqori mahsuldorlikka ega naslli avlod olish va kelajakda podani ular bilan to‘ldirish orqali qilingan xarajatlarni qoplash imkoniyatini yaratadi.
Chetdan olib kelingan jami 378 bosh monbelyard zotli sigirlarning sut mahsuldorligi shakl 2-sut- “Nasldor sigirlar kartochkasi” asosida o‘rganildi. Turli tana tuzilishga ega sigirlarni oziqlantirish va asrash sharoitlari bir xil bo‘lgan. Sut-go‘sht konstitutsional tipiga mansub sigirlarnig sut miqdori laktatsiyalar davomida o‘sib borgan. Sigirlarning sut miqdori I-laktatsiyaga nisbatan sut-go‘sht konstitutsional tipidagi sigirlarda II laktatsiyada 2,72 %-ga ishlab chiqarilgan sut; sut yog‘ chiqimi 2,49 %-ga; 4 %-li sut miqdori esa 116 kg-ga; o‘rtacha tirik vazni 8,27 %-ga ko‘paygan (R≥0,999). Tengqurlari go‘sht-sut konstitutsional tipiga mansub sigirlarda I-laktatsiyasiga nisbatan II laktatsiyasida 2,60 %-ga ishlab chiqarilgan sut: sut yog‘ chiqimi , 0,88 %-ga, 4 % sut miqdori 39,8 kg ga; o‘rtacha tirik vazni 8,92 %-ga ortiqcha bo‘ldi (R≥0,999).
Sigirlarning podadan chiqib ketish jadalligini o‘rganish shuni ko‘rsatadiki, I laktatsiyadan keyin sut-go‘sht konstitutsional tipidagi sigirlardan 34,2 % , go‘sht-sut konstitutsional tipidagi sigirlardan 32,7 % va II laktatsiyadan tegishli ravishda 59,7 % sut-go‘sht konstitutsional tipiga mansub 57,9 %; go‘sht-sut tipiga mansub sigirlar asosiy podadan chiqib ketgan.

 

 

Abstract. The effective use of imported cows with a productive life span in the farm increases the amount of milk obtained from them during lactation, as well as provides an opportunity to obtain many high-yielding offspring and cover the costs incurred by replenishing the herd with them in the future.
The milk yield of 378 imported Montbeliard cows was studied on the basis of form 2 milk - «Card of breeding cows». Cows with different body structure were fed and kept under the same conditions.
The amount of milk of cows belonging to the milk-meat constitutional type increased during lactation. The amount of milk of cows compared to the I- lactation in cows of the milk-meat constitutional type in the II-lactation, milk produced by 2.72%; milk fat output by 2.49%; The amount of 4% milk is 116 kg; average live weight increased by 8.27% (R≥0.999), milk produced by 2.60% in I-lactation compared to II-lactation in cows belonging to the meat-milk constitutional type: milk fat yield, 0.88%- ha, 4% milk amount to 39.8 kg; the average live weight was increased by 8.92% (R≥0.999).
The study of the speed of cows leaving the herd shows that after the I-lactation, 34.2% of the cows of the milk-meat constitutional type, 32.7% of the cows of the meat-milk constitutional type, and 59.7% of the cows of the II-lactation, respectively, belong to the milk-meat constitutional type. 57.9%; cows belonging to the meat-milk type have left the main herd.