Table 2. The element (K, Na, P, Ca and Mg) content (g/100 g of dry mass) of eggshells with different intensities of the pink pigment of the eggshell during incubation.

Intensity pigment	Element	Incubation period (d)						P value
		0	4	8	12	16	21
LIPa	Na	0.099 ± 0.006	0.101 ± 0.006	0.098 ± 0.015	0.106 ± 0.008	0.098 ± 0.002	0.086 ± 0.01	>0.05
	P	0.137 ± 0.005	0.143 ± 0.019	0.144 ± 0.011	0.142 ± 0.011	0.157 ± 0.032	0.156 ± 0.026	>0.05
	Ca	39.004 ± 0.805	37.954 ± 0.734	37.759 ± 0.635	38.219 ± 0.524	38.209 ± 0.19	37.863 ± 0.608	>0.05
	K	0.047 ± 0.001	0.051 ± 0.006	0.041 ± 0.005	0.045 ± 0.003	0.046 ± 0.003	0.038 ± 0.004	<0.05
	Mg	0.454 ± 0.043	0.465 ± 0.04	0.454 ± 0.052	0.507 ± 0.031	0.492 ± 0.037	0.432 ± 0.039	>0.05
MIPa	Na	0.11 ± 0.008	0.104 ± 0.004	0.107 ± 0.008	0.102 ± 0.012	0.09 ± 0.004	0.091 ± 0.004	<0.05
	P	0.122 ± 0.022	0.143 ± 0.004	0.157 ± 0.006	0.153 ± 0.011	0.154 ± 0.021	0.159 ± 0.038	>0.05
	Ca	40.929 ± 1.963	38.262 ± 0.359	39.438 ± 3.033	37.301 ± 0.559	37.856 ± 0.292	38.342 ± 0.564	>0.05
	K	0.048 ± 0.002	0.051 ± 0.003	0.048 ± 0.007	0.043 ± 0.003	0.041 ± 0.002	0.04 ± 0.002	<0.01
	Mg	0.424 ± 0.042	0.451 ± 0.006	0.499 ± 0.05	0.456 ± 0.023	0.442 ± 0.041	0.447 ± 0.026	>0.05
DIPa	Na	0.101 ± 0.014	0.094 ± 0.003	0.096 ± 0.002	0.09 ± 0.001	0.093 ± 0.005	0.091 ± 0.008	>0.05
	P	0.136 ± 0.007	0.15 ± 0.008	0.14 ± 0.006	0.144 ± 0.019	0.145 ± 0.024	0.14 ± 0.03	>0.05
	Ca	39.186 ± 0.876	38.487 ± 0.128	37.994 ± 0.404	37.822 ± 1.215	37.814 ± 0.258	38.322 ± 0.215	>0.05
	K	0.047 ± 0.003	0.048 ± 0.004	0.043 ± 0.004	0.037 ± 0.004	0.043 ± 0.005	0.038 ± 0.005	<0.05
	Mg	0.455 ± 0.049	0.44 ± 0.021	0.446 ± 0.05	0.37 ± 0.01	0.465 ± 0.044	0.429 ± 0.045	>0.05

Notes.

^aLIP = light intensity pigment, MIP = medium intensity pigment, and DIP= dark intensity pigment.

^bValues are the mean ± SEM.