The characteristics of cluster redpepper in nutrition uptake and its response to N and P fertilizers

Fertilizer application study on cluster redpepper was conducted by using saturated-D-optimum design．The average nutrition uptakes of the cluster redpepper are N 274kg/hm² ，P₂O₅57kg／hm² ，K₂O 265kg／hm²，Ca 124kg／hm²，and Mg 26kg/hm² respecitvely when the yidd is 3826kg／hm²．At the yield of 4767．2 kg／hm² ，the highest profit，15131 yuan／hm² ，is obtained．The ratio of output／input is 17．71：1．The optimum application rate of N is 281．1kg／hm² and that of P₂O₅ is 82．1kg／hm² ．