根外追肥对南方红豆杉一年生苗木生长的影响

Effect of Foliage Top Dressing on 1-year-old Taxus chinensis Seedling Growth

对南方红豆杉1年生实生苗进行根外追肥,试验结果表明:根外追肥对苗木的高、径生长均有明显的促进作用,追肥后平均高达26～30 cm,地径为0.42～0.52 cm,而对照则分别为22.9 cm,地径0.36 cm,这表明根外追肥能促进红豆杉速生丰产,而且可以缓解红豆杉苗6～7月间的生长暂停状态.不同肥料对苗木高、地径生长的促进作用呈显著差异,其中大肥王、复合肥对苗高、地径的增长效果较大,其苗高分别比对照增加72.88%、108.50%,地径分别比对照增加92.3%、76.9%.在南方红豆杉实生苗培育生产上可推广应用复合肥进行根外追肥.

Foliage top dressing was conducted on 1-year-old Taxus chinensis seedling, the results showed that foliage top dressing had the evident promoting effect on the seedling height and diameter growth, the average height reached 26-30 cm after foliage top dressing, the ground diameter reached 0.42-0.52 cm, whereas the above of control reached 22.9cm, the latter of control reached 0.36 cm, which showed that foliage top dressing could promote T. chinensis fast growing and high yield, and relieve its growth pause condition during Jun.～ Jul. There was significant difference between various fertilizers＇ promoting effects on seedling height and ground diameter growth, the king fertilizer and compound fertilizer had relatively big growth effects on the seedling height and ground diameter growth, the seedling heights were 72.88% and 108.50% higher than the control, respectively, the ground diameters were 92.3% and 76.9% higher than the control, respectively. The compound fertilizer might be popularized and applied to conduct the foliage top dressing during T. chinensis seed plants culture and production.