Study on Response Model of N, P, K Fertilizer in Gynostemma pentaphyllum

作者 Zhang Chenlu; Liang Zongsuo; Wang Weiling; Sun Qun; Li Jincan; Zhang Jun

期刊 Acat Agriculturae Boreali-Occidentalis Sinica , 2005,4:14

摘要 The optimum design of three factors of D-saturation design plan of N, P, K was adopted in the experiment. The field experiment was conducted in the Jiaogulan base of Pingli county Shaanxi province. The response N, P, K of different fertilizer rate of different medicinal part in the same soil condition was obtained. According to the response equations the optimum amount of N, P, K fertilizer were obtained. Fertilizer amount of N, P, K was N 158. 05--222. 36 kg/hnr ,P2O,5l. 915 - 116. 10 kg/hnr, K,O 104. 06~ 170. 134 kg/hnr''in Jiaogulan up part average target yield at 3 900 - 4 600 kg/hnr in one year. Fertilizer amount of N , P, K was N 102. 88-189. 02 kg/hm2 ,P2()560. 98 - 100. 49 kg/hm2, K2() 152. 31 ~ 194. 34 kg/hm2 in Jiaogulan down part average target yield at 900 - 1 200 kg/hm2 in one year. Analyzed N, P, K influence to Jiaogulan growth and yield. Although the characteristic of jiaogulan fertile necessity is different in different position, it showed that N, P, K can promote increasing of Jiaogulan yield, but it is limited. NP is negative, NK is positive, PK is positive from two factors mutual function. It showed that chemical fertilizer must he used in fixet limitations and right percentage. Otherwise the yield will he reduced.

涉及物种 绞股蓝 Gynostemma pentaphyllum