摘要
对杨树溃疡病及松材线虫病对树木电指标的影响进行研究。结果表明:杨树溃疡病胁迫下,毛白杨扦插苗POD酶活性先增大后减小,PPO酶活性持续增大,树木干部电容和单位电容呈减小趋势,而树木干部阻抗呈增大趋势,最先表现出统计学差异性的指标是POD酶活性,其次为树木干部电容,之后为树体干部阻抗,最后是PPO酶活性;树木干部电容和单位电容与马尾松枯针率均有显著的正相关关系,同时利用树体干部电容0·5nF为阈值,判断马尾松是否感染松材线虫的准确率可达89·26%。
The paper studied the influence of biological stresses including poplar canker and pine wood nematode on the electrical indexes of trees. The results showed that the activity of peroxidase （POD） increased and then decreased, activity of pelyphenoloxidase （PPO） and tree stem impedance increased gradually, tree stem capacitance and unit capacitance decreased after Populus tomentosa cuttings was infected with Botryosphaeria dothidea. The statistical difference of activity of POD was showed earlier than tree stem capacitance, while the difference of tree stem capacitance was showed earlier than activity of PPO. Tree stem capacitance and unit capacitance had significant positive correlation with the ratio of wilt needles to all needles. The accuracy rate could reach 89.26 % when 0.5 nF threshold of tree capacitance was used to estimate whether the Pinus massoniana was infected with Bursaphelenchus xylophilus.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2006年第12期68-72,共5页
Scientia Silvae Sinicae
基金
国家自然科学基金项目"林木健康状况评价的电指标生物学基础"(30471384)。
