Relationship among the application of N，P and the yield characteristics of cluster redpepper

The effects of nitrogen and phosphorus application on the yield of cluster redpepper and its other relevant characteristics have been studied through a two-year test，using saturated D-optimum design．The results show that phosphorus has larger effect on increasing the pepper numbers of a single plant than nitrogen；N and P have the similar effect onthe weight of a single pepper；N has larger effect on increasing the plant height than P；the shoot number decreases with the increase of P application and increases with the increase of N application；the yield responses show a parabola model to either N or P application According to the fertilizer response equation obtained，the suitable N and P₂O₅ applied is 281．1lkg／hm² and 82．11kg／hm² respectively to get the target yield of 4767 kg／hm² ．