(1) adding calcium diet or vitamin D3 observation eggshell thickness changes. If the shell thickness thinning, calcium deficiency; If the eggshell appear deformity, suggesting a lack of vitamin D3, should be properly added.
(2) to adjust the proportion of calcium phosphate in the brood, incubation period, the proportion of calcium phosphate in the 1.5 ~ 2:1, the absorption of calcium and phosphorus utilization rate is higher. Calculation of phosphorus content in the production, we should calculate the effective phosphorus in feed. Plant-based diet, most of the phosphorus in the form of phytic acid phosphorus exist, not easily absorbed by decomposition, so must add phosphates, or adding phytase, to promote the decomposition of phytic acid phosphorus, guarantee of phosphorus in the blood to a certain extent, to keep high gossypol grain in the appropriate proportion of calcium phosphate.
(3) the environmental regulation Should summer birdhouse ventilation cooling, to be warm in winter to keep warm, keep the henhouse appropriate temperature. To strengthen management, keep the henhouse environment quiet, try to reduce stress factors, to create a good environment of egg.
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