Effect of different fertilizing treatments on quality of red clover hay

The effect of nitrogen and phosphorus fertilizing on quality of red clover (Trifolium pretense cv. Minshan) hay was studied. The results showed that the highest CP and Ca contents were obtained under the treatment of A3B2 and they were 2.5% and 0.14% higher than the control respectively. The highest CA and P contents were obtained under the treatment of A1B3, and they were 1.2% and 0.45% higher than the control respectively. The lowest ADF and NDF content were obtained under the treatment of A1B2 and A1B3 and they were 2.1% and 1.5% lower than the control respectively. Among all treatments, A3B2（N 150 kg/hm2,P2O5 120 kg/hm2）was the best treatment and it had the best hay quality.