464 



Journal of Agricultural Research 



Vol. IV, No. s 



Table V. — Chemical composition (in percentage) of the feces of lainbs 



Table VI. — Apparent coefficients of digestibility of the nutrients of the rations of lambs 



Constituent. 



I<ow-protein ration. 



Lamb 

 No. 



468. 



Lamb 



No. 

 463. 



Aver- 

 age. 



Medium-protein ration. 



Lamb 

 No. 



462. 



Lamb 

 No. 



458. 



Aver- 

 age. 



High-protein ration. 



Aver- 

 age. 



Dry matter. . . . 



Protein 



Nonprotein. .. , 

 Ether extract. 

 Carbohydrates 



Ash 



Phosphorus. . . 

 Nitrogen 



72. I 

 56.6 

 100. o 

 50.1 

 76. 7 

 44. 6 



2-5 



64. I 



75-5 

 59- o 

 100. o 

 57-6 

 80. 1 

 45- I 

 7-7 

 65-7 



75-5 



68.2 



100. o 



63. 2 



79- I 

 42. o 



18.5 

 73-3 



74.0 



63- 9 

 100. o 

 69. o 

 77-5 

 43-6 

 II- 5 

 69-9 



74.8 



66. I 



100. o 



66. I 



78-3 

 42.8 

 15.0 

 71. 6 



74-4 



73-4 



100. o 



69-5 

 76.5 

 45-3 

 9.0 

 77.6 



Table VII. — Amounts of nutrients apparently digested by the lambs and the metaboli- 

 zable energy of the digested nutrients 



Constituent. 



Low-protein ration. 



Lamb 



No. 

 46S. 



Lamb 

 No. 



463. 



Aver- 

 age. 



Mediiun-protein ration. 



Lamb 

 No. 



462. 



Lamb 

 No. 



4S8. 



Aver- 

 age. 



High-protein ration. 



Lamb 

 No. 



453. 



Lamb 

 No. 



451. 



Aver- 

 age. 



Dry matter gm 



Protein gm 



Nonprotein gm 



Ether extract. . .gm 

 Carbohydrates, .gm 



Ash gm 



Phosphorus gm 



Nitrogen gm 



Metabolizable en 

 ergy«. .. .Calories 



769. 78 



71-91 

 16.86 

 22. 62 

 637.24 

 22. 21 

 •38 

 14-37 



3.239 



823. 58 

 79-34 

 22. 05 

 18. 22 



670. 04 



30-85 



. 10 



17.42 



3.390 



796. 68 



75-63 



19. 46 



20. 42 



653- 64 



26.53 



.24 



15-90 



3.315 



890. 

 119. 



24. 



28. 

 663. 



27. 



24. 



626 



-30 



. 90 



'•43 

 •39 

 •63 

 -58 

 •59 

 .04 



4,348 



964. 



123. 



26. 



32- 



734^ 



31- 



25-7: 



932 



165 



30 



34 



662 



35 

 33, 



934- 75 



169. 15 



30.91 



35^91 

 660. 09 



36^59 



•47 



33-75 



)i 3,909 



933 

 167 



30 



35 

 661 



36 

 33 



3.900 



o The metabolizable energy of a ration is the energy that can be Hberated and utilized in the animal body, 

 or the gross energy less the energy contained in the feces, urine, and intestinal gases. The metabolizable 

 energy of the rations has been calculated by multiplying the weights of the digestible nutrients by the 

 following factors: Digestible proteins and nonproteins, 4.1; digestible carbohydrates, 4.2; and digestible 

 ether extract, 8.8. 



