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对全省18个县24块新营建的降香黄檀林分在2011~2013年连续开展寒害和生长调查,分析结果表明:降香黄檀林分早期生长较快,树高年均生长可达1.05 m,胸径年均生长达1.03 cm,但是个体间差异较大;当最低温在0~5℃之间并保持5~10天时,降香黄檀出现较为严重的寒害,林分寒害等级与月均温、海拔、树高和林龄呈极显著的负相关,与纬度、胸(地)径呈极显著的正相关;林分所处地形对寒害等级也有一定影响;受寒害的林分在次年寒害较轻的情况下可恢复生长。依据各地寒害等级,并结合各地气温及寒害恢复情况,绘制广东省降香黄檀人工林寒害分区图,将全省划分为适宜栽培区、次适宜栽培区、风险栽培区和不适栽培区四种类型。
The investigation of 24 new destructive Dalbergia species from 18 counties in the province from 2011 to 2013 conducted a series of surveys on cold damage and growth. The results showed that: the Dalbergia xylostella grew rapidly in early stage and its annual growth rate was 1.05 m, average annual growth of breast diameter reached 1.03 cm, but there was a big difference among individuals. When the lowest temperature was between 0 and 5 ℃ and kept for 5 to 10 days, The average temperature, altitude, tree height and age were extremely significantly negatively correlated with latitude and chest (ground) diameter was extremely significant positive correlation; the topography of the forest location also had some impact on the level of chilling injury; The following year, the case of mild cold damage can resume growth. According to the degree of chilling injury in different places and the recovery of temperature and chilling injury in different areas, the map of chilling injury of Dalbergia xylostella plantations in Guangdong Province was drawn, and the province was divided into four types of suitable cultivation area, sub-suitable cultivation area, risk cultivation area and ill cultivation area Types of.