Purpose of the study: to assess chlorella impact on productivity of sows and on speed of piglets’ growth. This research of master degree was accomplished in 2004-2006 in Animal Nutrition Department of Lithuanian Veterinary Academy, in feed research laboratories of Agrochemical Investigations Centre of Lithuanian Institute of Agriculture and joint stock company AB “Kauno Grūdai“ and in breeding-ground of farmer G. Charitonovas (Žadeikonių village, Pasvalio region) with the swine of the Swedish Yorkshire breed of the first group. Research revealed that: 1. during suckling period mass reduction in sows, that were given a suspension of chorella during pregnancy period, was lower by 14.5% compared to the control group containing sows that were fed by combined feeds only (p<0.05); 2. prolificacy of the test group sows was by 10.0% higher (p>0.05), piglets produced by them were 9.6% heavier (p<0.05) and families of born piglets where less varied when compared to the control group; 3. sows of the test group that were given a suspension of chorella were by 10.98 kg or 22.4% milkier when compared to the sows of control group (p<0.05); 4. chorella had a positive impact on change of piglets mass: piglets at birth were by 9.6%, on the 21st day of life – by 8.4%, on the 35th day of life, i.e. at the wean off – by 7.6% heavier when compared to the piglets of control group (p<0.05); 5. in the test group retention of piglets was as follows: on the 10th day of life – by 2.2%, on the 21st day... [to full text]