以云南新平县4年生美国山核桃为研究对象,采用了3个因素3个水平的iF交试验设计,分析施肥对地径、树高、冠幅的影响.结果表明,地径增粗的最佳施肥比例为N100P100K200,增粗最快的处理为最慢的1.77倍；树高增长的最佳施肥比例为N200P100K200,增长最快的处理为最慢的2.32倍；冠幅增大的最佳施肥比例为N400P200K200,增量最快的为最慢的1.83倍.%Taking the 4 years old Carya illinoensis trees planted in Xinping county of Yunnan province as the study materials,adopting the orthogonal test design of three factors and three levels,the effects of fertilization on growth of basal diameter,tree height and crown width were studied and analyzed.The results showed that the optimum fertilizer combination for basal diameter and height growth were N100P100K200 and N200P100R200 respectively,the growth were 1.77 times of the worst fertilization treatment; the optimum fertilizer combination for crown width growth was N400P200K200,the growth were 1.8 times of the worst fertilization treatment.
展开▼
