小美旱杨插条苗(1-0)施肥的研究

Study on the Application of Fertilizers N, P and K to the Cuttings of Populus popularis Hsü(1-0)

通过田间试验,对小美旱杨1年生插条苗施用N,P,K矿质肥料的效果及其生长规律进行了研究。结果表明:华北地区的黄潮土所含N,P元素不能满足苗木生长的需要,而含K丰富。培育小美旱杨1年生插条苗需施用N和P肥,K肥可以不施。最佳施肥量为:N200kg/ha,P_2O_6100kg/ha;其N,P,K比例为2∶1∶0。根据当前的肥料和苗木的市价,用反应曲面方程计算获得最大经济效益的施肥量为N273.93kg/ha,P_2O_6121.15kg/ha。

This paper, based on field experiments, deals with the study of the effects of the mineral fertilizers N, P and K applied to one-year cuttings of Populus popularis Hsüand of the law of their growth. The results of the experiment on the effects of fertilizer application show that the content of elements N and P in the yellow fluro-aquic soil of north China cannot meet the demands of the plant growth, although the content of element K is rich. Consequently, fertilizers N and P should be applied to one-year cuttings during their cultivation, whereas fertilizer K should not be applied. The optimum amount of fertilizers applied is N 200kg/ha, and P_2O_5 100kg/ha, and the proportion of N, P and K is 2:1:0. According to the present market price of fertilizer and stocks, by the calculation of response equation, the amounts of fertilizers for the best economic benefit are N 273.93kg/ha, and P_2O_5 121.15kg/ha.