降香黄檀在肇庆市属国有林场适生性评价

薇甘菊是一种危害严重的外来入侵物种,也是我国林业检疫性有害生物。文章根据薇甘菊的生物学特性,选择对菊科植物有高活性的药剂成分进行复配研制药剂,经室内和林间的药效试验,筛选出能高效防治薇甘菊且对环境安全的新药剂——24%二氯吡啶酸·2,4-滴水剂,商品名为"紫薇清"。

Adaptability Evaluation of Dalbergia odorifera in Zhaoqing State Forestry Farms

A total of 500.60 hm2 of Dalbergia odorifera were planted in seven state forest farms of Zhaoqing from 2007 to 2010. Growth situation and adaptability of D.odorifera were investigated and evaluated. The plantations displayed the best growth in Dashuikou Forestry Farm and Dananshan Forestry Farm, intermediate adatability in Dakengshan Forestry Farm, Qinggui Forestry Farm, and partial area of Beilingshan Forestry Farm, and the worst performance in Xinggan Forestry Farm and Kuidong Forestry Farm. The young plantations of D. odorifera tolerated a short period of frost less than 5 days. No injury was observed at the sites with frost period less than 3 d, but slight damage in 4 to 5 d frost; More severe damage from frost appeared at the sites in 10 to 15 d frost and trees died in the condition with 45 to 60 d frost. Two year old saplings sprouted after suffering frost damage, while one year old seedlings died immediately after frost damage. These results provided useful information for the development of D. odorifera plantation in Zhaoqing and surrounding areas with similar climate.