Researches on the proportion of N,P and K fertilizers to hot pepper in purple-colored of Xuanwei

An appropriate proportion of N,P and K fertilizers to hot pepper planting in purple-colored soil saw the sequence affecting hot pepper yield was as: phosphate fertilizernitrogenous fertilizerkalium fertilizer.The optimized proportion of N,P and K fertilizers,amounting to the hot pepper yield≥20400 kg/hm~2,ranges as follows: N =113.9～204.6 kg/hm~2,P-2O-5 =145.9～177.2 kg/hm~2,K-2O =49.3～153.8 kg/hm~2,N∶P-2O-5∶K-2O=1∶0.87～1.28∶0.43～0.75.It was suggested that the appropriate proportion of N,P and K fertilizers should be measure as: N 159.2 kg/hm~2,P-2O-5 161.5 kg/hm~2,K-2O 101.5 kg/hm~2,N∶P-2O-5∶K-2O=1∶1.01∶0.64.The prospective yield in maximum reached 21961.5 kg/hm~2.The fertilization profits resulted to 5417.7 yuan/hm~2 by a rate of returns as 1∶5.00.