Animal were housed in open barn in 4x6-m individual pens bedded with clean rice straw and had ad libitum access to feed,fresh water and a mineral block(each1kg of mineral block contain :NaCl 960g;Ca 3g;Mg 2.2g;P1.5 g;Fe 3.5g;S 1g;Ze 0.85g;Mn 0.22mg;I 50mg;K 15 mg:Co 18mg;Se 10mg; feed additive 2g) during the 14-d prepartumand 60-dpostpartum.