生物制剂对沙地樟子松造林成活率及根系生长影响的研究(英文)

Effect of biological agents on survival rate and root growth of Scots Pine seedlings

采用Pt菌剂、ABT生根粉、HRC吸水剂、丰产素等生物制剂处理2年生樟子松苗木,在内蒙古加格达齐进行了田间造林试验。并对樟子松造林成活及地下根系生长效应进行了研究,观测苗木成活率、根系生长等因子。结果表明:Pt菌剂3号ABT生根粉制剂显著地提高了樟子松成活率,它分别比对照高29.3%和23.6%,也促进了根系的生长,特别是细根的增加。回归分析表明苗木细根长度与苗木成活率呈显著正相关,说明生物制剂提高成活率是通过增加细根量来实现的。表3参10。

Two-year-old Scots pine (Pinus sylvstris var.mongolica) seedlings were treated with Pt mycorrhiza powder, ABT root-growing powder, HRC water-absorbing agent and high-yield powder, and planted on the sandy land in Balinyouqi, Inner Mongolia (180°12′13″E and 43°13′05″N). The effect and function of these biological agents on survival rate of seedlings were tested and analyzed by measuring the fine root growth and gross root growth. The results showed that the survival rates of the seedlings treated with Pt3, ABT, and HRC biological agents increased by 29.3%, 23.6%, and 16%, respectively. The regression analysis revealed that the length of fine roots (<2 mm) was positively correlated with seedling survival rate, which means that the Pt3 powder, ABT foot-growing powder and HRC water-absorbing powder increased the survival rates of the seedlings by promoting the growth of fine roots. Keywords Biological agents - Pinus sylvstris var.mongolica - Sandy soil - Roots - Survival rate CLC number S723.1 - S791.253 Document code A Foundation item: This article was supported by the National Natural Science Foundation of China (No. 39970627). Biography: TANG Feng-de (1967-), male, Ph. Doctor in Institute of Applied Ecology. Chinese Academy of Sciences, Shenyang 110016, P. R. China. Responsible editor: Zhu Hong