(1) Suitable fertilizer period should be in spring, summer and autumn. Not suitable in winter, it will hinder the growth of the ewes and affect the breeding efficiency in the following year. (2) Suitable fertilizer time should not be too long, limited to one week. (3) Non-disease, weak, disabled, and inferior sheep are suitable for fertility. (4) The method of applying fertilizer is slightly different in different regions.
(2) Northeastern and northwestern grazing areas can increase the amount of concentrates and reduce the amount of ewes.
(3) In North China, East China, and other areas where livestock and poultry husbandry are combined, generally half of the nutrients contained by the fine and coarse materials can be fed.
(4) Central China, South China and other confinement areas can appropriately reduce the amount of concentrate and increase the amount of ewe exercise.
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