Summary and Conclusions 



Nutritive values of Ijromegrass hays grown undei four levels of nitro- 

 gen fertilization and harvested at three stages of maturity were deter- 

 mined with identical twin steers. 



Nutritive evaluation was made on the hasis of digestil)le dry matter, 

 digesti])le protein, total digestihle nutrients, and digestihle energy. 



The experiment was repeated for three years to study the uniformity 

 and persistency of the crop on the hasis of nutrient yield per acre. 



The level of nitrogen fertilization did not affect the digestihilities of 

 the dry matter, the carhohydrate portion, nor the energy of the forage to 

 a great extent. The digestihility of the protein, however, increased with 

 the level of nitrogen fertilization. There was no appreciahle effect on the 

 total digestihle nutrient content of the hays due to the level of nitrogen 

 fertilization. 



Advancing stage of maturity decreased the digestihilities of all the in- 

 gredients of the hromegrass hays, confirming previous results at this Sta- 

 tion wHh timothy hay. 



The results showed that early-cut hromegrass hay grown under a 200 

 pound nitrogen fertilization per acre was as good a protein source as le- 

 gume hay. 



The results further showed that while the late-cut hromegrass hay in- 

 creased the yield of dry matter per acre, and consequently the digestihle 

 energy by ahout 10 per cent, the digestihle protein content decreased by 

 more than 30 per cent. 



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