为研究环剥和环割这2种修剪措施对薄壳山核桃新梢生长和叶片碳氮代谢物积累的影响，以5年生薄壳山核桃幼树‘波尼’（‘Pawnee’）为试材，对同一规格长度（40～45 cm）新梢进行环剥处理（环剥1 mm、环剥2 mm和环剥3 mm）和环割处理（环割1圈、环割2圈和环割3圈）。不同宽度环剥和不同圈数环割处理对薄壳山核桃的影响不同。环剥和环割处理能抑制新梢伸长生长，促进粗度生长；环剥3 mm处理的叶片可溶性糖含量、淀粉含量、蛋白质含量和C/N比高于其他处理和对照，但与环剥2 mm无显著性差异；环割3圈处理的叶片可溶性糖含量、淀粉含量、蛋白质含量和C/N最高。综合考虑修剪措施可能对树体的影响，环剥2 mm或环割3圈为生产上新梢的适宜修剪方式。
To study the effects of the two pruning treatments (girdling and ringing) on the growth of branches and accumulation of carbon-nitrogen metabolites in leaves of Carya illinoinensis, branches from 5-year-old grafted seedling of ‘Pawnee’ pecan were girdled with different widths (1 mm/2 mm/3 mm) and ringed with different circles (1 circle/2 circles/3 circles). The results showed that girdling and ringing inhabited the shoot elongation, but promoted the shoot radial growth. The contents of soluble sugar, starch, protein and the ratio of C/N in the leaf treated with girdling 3 mm were higher than other treatments and the control, but no significant differences were found in the treatment of girdling 2 mm. The contents of soluble sugar, starch and protein and the ratio of C/N in the leaf treated with ringing3 circles were the highest. Girdling and ringing might have effects on the trunk growth of Carya illinoinensis. The suitable pruning treatment of Carya illinoinensis is girdling 3 mm or ringing 3 circles.