不同埋干深度对楸树根系生长特性的影响

目的]研究4种埋干深度对1年生豫楸1号根系生长特性的影响。方法]埋干深度设计4种处理(10、20、30和40 cm),各处理分别选3株平均木,采用全根挖掘法,调查其根系数量、长度、生物量及根系生物量的垂直分布特性。结果]不同埋干深度间根系数量无显著差异,以细根数量最多,其次为中根和粗根。各处理间根系长度也无显著性差异,以粗根长度最大,其次为中根和细根。处理间的根系总生物量存在显著性差异,其随埋干深度增大递减;粗根、中根和细根生物量主要分布在嫁接痕下根桩0~40 cm范围。结论]该研究为生产中楸树栽植时埋干深度的科学选择提供参考。

Effects of Different Trunk Buried Depth on Root Traits of Catalpa bungei

Objective ] To understand root traits of one-year-old Catalpa bungei el. ＇ Yu-1 ＇ under different trunk buried depth. Method ] Four trunk buried depth were designed（ 10, 20, 30 and 40 cm）, and among each treatment three standard trees were selected, and then their root number, length and biomass were investigated with digging method. Result] Differences of root number, length among four treatments were not significant, but differences of root biomass were significant. Fine root number was the biggest and then they were thick root and mid- dle root. Root biomass became smaller and smaller with buried soil deepened, they mainly distributed in 0 -40 cm piles under the grafting mark, Conclusion] The study will provide scientific basic for Catalpa bungei afforestation in Shandong.