Abstract: An experiment using a randomized block design was carried out to explore the effects of applying phosphorous fertilizer on nutrients and yields of Caragana used as forage on calcareous soil. The objective was to provide good nutrient management when Caragana is used as forage to solve the shortage of high quality forage in the Loess Plateau. The dry matter yield, total uptake of nitrogen (N), phosphorous (P), potassium (K), calcium (Ca) and iron (Fe), and crude protein yield of Caragana per hectare significantly increased after P application. N, P, and K concentration in the leaf as well as N and P concentration in the stem increased after P application. Conversely, Ca and Fe concentrations in leaf and stem and K concentrations in stems decreased after P application. There was a significant (P<0.01) positive correlation between P application rate and dry matter yield and crude protein yield of Caragana. Meanwhile, P application can make the value of Ca/P of Caragana reach the standard value for livestock diet. The optimum P rate was 180 kg/ha with dry matter and crude protein yields increased by 76.5% and 84.0% respectively in the first year and by 73.9% and 91.1% in the second year compared with no application of P fertilizer. Based on analysis of the above results, we suggest that P fertilizer should be applied at a rate of 180 kg/ha every other year to maintain the nutrient requirement and stabilize high yield and quality of Caragana when it is used as a forage resource.