Effects of nitrogen,phosphorus,and potassium fertilizer application on yield and output of the main extracts of Erigeron breviscapus
Lu Ze-Gang;Zhu Yong-Quan;Lu Ying-Chun;Zhang Guang-Hui;Wang Qing-Xue;Long Guang-Qiang;Yang Sheng-Chao;College of Resource and Environmental Science,Yunnan Agricultural University;National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwest China,Yunnan Agricultural University;Yunnan Honghe Qianshan Biological Engineering Co.,Ltd.;
We studied the effects of different fertilizers nitrogen(N),phosphorus(P),and potassium(K) application rates on the growth index,yield,content,and output per unit area of three extracts(baicalin,total caffeic acid ester,and total flavone) of Erigeron breviscapus(Vant.) Hand.-Mazz.).Results showed that N and P application effectively increased the plant growth index.Yield of E.breviscapus increased with elevated N,P,and K application,with N application resulting in the greatest increase.Content of the three E.breviscapus extracts decreased with the application of N within a certain range,whereas application of P and K had no effect.Output per unit area of the three extracts were positively correlated with E.breviscapus yield.The application of N,P,and K fertilizers increased the yield of E.breviscapus and outputs of the three extracts.The highest output per unit area of the three extracts was achieved at N,P,and K application rates of 103.5,126.0 and 112.5 kg/hm~2,respectively.