浙江红花油茶高接换冠成活率影响因素研究

为研究浙江红花油茶高接换冠成活率影响因素,解决嫁接成活率低的问题,2013年6月从中国林业科学研究院亚热带林业研究所引进浙江红花油茶优树穗条,在青田县大垟山林场开展浙江红花油茶高接换冠试验,分析砧木林郁闭度、坡位、砧木生长势及接穗保存时间等因素对嫁接成活率的影响。结果表明,林分郁闭度在0.3~0.7之间,随着郁闭度增加嫁接平均成活率提高;郁闭度在0.7~0.9之间,随着郁闭度增加,嫁接成活率降低;当郁闭度为0.7时,嫁接成活率最高为88.8%。山腰的嫁接成活率高达86%,显著高于山顶和山脚。浙江红花油茶砧木生长势越强嫁接成活率越高。接穗于采集当天嫁接效果最好成活率达89.1%,接穗保存1、2、3、4、5、6天嫁接,成活率分别为85.2%、75.2%、51.6%、28.1%、12.2%、9.3%。偏相关分析表明,各因素对嫁接成活率影响由大到小依次为接穗保存时间(-0.97)、郁闭度(0.85)、生长势(0.81)、坡位(-0.65)。

Influencing Factors of the Survival Rate of Camellia chekiangoleosa Crown Grafting

To study the influencing factors of the survival rate of Camellia chekiangoleosa crown grafting and solve the problem of low graft survival rate, in June 2013, the Institute of Subtropical Forestry, Chinese Academy of Forestry introduced C. chekiangoleosa champion tree spike, carried out the crown grafting test of C. chekiangoleosa in Dayangshan Forest Farm in Qingtian County, and analyzed the influence of canopy density, slope position, rootstock growth potential and scion storage time on graft survival rate. The results showed that the forest canopy sealing degree was between 0.3 and 0.7, and the average survival rate of grafting increased as the canopy sealing degree increased. The canopy closure degree was between 0.7 and 0.9, and the graft survival rate decreased with the increase of canopy closure degree. When the canopy sealing degree was 0.7, the grafting survival rate was 88.8%. The survival rate of grafting on the mountainside was as high as 86%, which was much higher than the survival rate on the top and foot of the mountain. The stronger the growth potential of C. chekiangoleosa rootstock, the higher the graft survival rate was. The grafting effect of the scion on the day of the scion was the best, with a survival rate of 89.1%. The scion was stored for 1, 2, 3, 4, 5, and 6 days for grafting, the survival rate was 85.2%, 75.2%, 51.6%, 28.1%, 12.2% and 9.3% respectively. Partial correlation analysis showed that the effects of various factors on the graft survival rate were scion storage time (-0.97), canopy closure (0.85), growth potential (0.81) and slope position (-0.65).