不同致死因素对抗逆剂侧柏蘸浆造林效果的影响

Influence of Different Lethal Factors on Afforestation by Dipping Roots of Platycladus orientalis in A Clay Slurry with Plant Stress-resistance Agents

以多效抗旱驱鼠剂(RPA)为参照,利用蘸浆造林方法比较了不同地区采用纳米植物抗逆剂(NPA)和RPA侧柏蘸浆造林的整体效果,分析了干旱、鼢鼠、草兔和其他因素对林木致死作用的变化。结果表明,引起造林后侧柏死亡的主要因素是干旱和鼠(兔)害,其定植当年和3年的致死贡献率分别为63.9%、32.4%%和63.0%、35.1%。药剂处理区的干旱致死贡献率增强,鼠(兔)害致死贡献率减弱。定植当年NPA和RPA的综合预防效果为69.2%和39.0%。其中,干旱为59.4%和18.0%,鼠(兔)害为97.1%和92.8%。定植3年的综合预防效果为84.6%和68.6%。其中,干旱为80.9%和63.0%,鼠(兔)害为93.6%和82.8%。其他因素致死作用重复与地区间变异较大,与药剂试验关联不紧密,对野外试验,尤其是鼠(兔)害预防效果评价干扰极大,分析时必须剔除。

Referring to RPA, the whole afforestation effects of dipping Platycladus orientalis in a clay slur- ry contained NPA or RPA in different areas were compared, and the changes of the roles of drought, zokor, hare and other factors in the death of tree were analyzed. The results showed that the main causes of death of P. orientalis seedlings were drought and rodent damage, accounting for 63.9% and 32.4% in the first year and 63.0% and 35.1% in the third year. In drug treated area, the drought lethality contribution rates increased, and rodent lethal contribution rate reduced. In the first year comprehensive prevention effects of NPA and RPA were 69.2% and 39.0%. Among them, prevention effects were 59.4%and 18.0% from drought resistance, 97.1% and 92.8% for rodent damage control. After three years, comprehensive prevention effects were 84. 6% and 68. 6%. Prevention effects were 80. 9% and 63. 0% on drought, 3.6% and 82.8% on rodent damage. Other factors on the lethal effects were not significant.