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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。
The 2-year-old Pinus sylvestris seedlings were treated with antibacterial agent, ABT rooting powder, HRC water-absorbing agent and high yield hormone, and the afforestation experiment was conducted in Jaggedqi, Inner Mongolia. The effects of afforestation on Pinus sylvestris var. Mongolica and the growth of underground roots were studied. The survival rate of seedlings and root growth were observed. The results showed that the antibacterial agent ABT 3 ABT rooting powder significantly increased the survival rate of Pinus sylvestris var. Mongolica, which was 29.3% and 23.6% higher than that of the control respectively. It also promoted the root growth, especially the increase of fine roots. Regression analysis showed that seedling root length and seedling survival rate was significantly positively correlated, indicating that biological agents to improve the survival rate by increasing the amount of fine roots to achieve. Table 3 Reference 10.