利用热扩散式边材液流探针和Watch dog 小气候观测仪对延庆县上辛庄水土保持站山杨(Populusdavidiana)边材液流速率及其与环境因子的关系进行了观测研究。结果表明,山杨树干边材液流曲线呈宽峰状,表现出明显的昼夜变化和季节变化规律,...利用热扩散式边材液流探针和Watch dog 小气候观测仪对延庆县上辛庄水土保持站山杨(Populusdavidiana)边材液流速率及其与环境因子的关系进行了观测研究。结果表明,山杨树干边材液流曲线呈宽峰状,表现出明显的昼夜变化和季节变化规律,日出后7:00-8:00时液流开始上升,并于13:00-16:00 时达到峰值,然后迅速下降,19:00时速度变慢,至次日日出之前液流微弱,时断时续;7 月份进入雨季,液流速率提高,8 月份由于持续干旱,有所下降,进入9月份,地形雨增加,含水量湿度提高,液流速率又重新上升,10 月份山杨生长变慢,液流速率明显下降。同时,分析了液流速率的波动规律与主要气象因素波动的相关性。展开更多
A new sapwood rot on seedlings of Prunus persica, caused by Schizophyllum commune, was reported from Tieling City, Liaoning Province, Northeast China.The disease caused severe damage on 5 year-old seedlings of Prunus ...A new sapwood rot on seedlings of Prunus persica, caused by Schizophyllum commune, was reported from Tieling City, Liaoning Province, Northeast China.The disease caused severe damage on 5 year-old seedlings of Prunus persica. The illustrated description of the pathogen was given. The infection route, damage and symptom of the disease were supplied. Schizophyllum commune infected other seedlings in the same area.展开更多
文摘A new sapwood rot on seedlings of Prunus persica, caused by Schizophyllum commune, was reported from Tieling City, Liaoning Province, Northeast China.The disease caused severe damage on 5 year-old seedlings of Prunus persica. The illustrated description of the pathogen was given. The infection route, damage and symptom of the disease were supplied. Schizophyllum commune infected other seedlings in the same area.
