截干与施肥处理对白木香萌芽生长的影响

Effects of truncation and fertilization on germination and growth of Aquilaria sinensi

为了探讨截干和截干后施肥处理对白木香萌芽生长的影响,为营造白木香“多干型”经营模式和采穗圃穗条生产提供技术参考和理论依据。以2 a、6 a林龄白木香试验林为研究对象,开展不同截干高度、不同林龄和截干后施肥处理对白木香萌芽数量及萌芽枝条生长量影响的试验。研究结果表明,2 a白木香的萌芽数量、萌芽枝条基径、长度均随着截干高度的增加呈现先降低后升高的趋势。白木香单株萌芽数量在7.6~15.4个之间,截干高度15 cm4个月时萌芽枝条长度最长(15.10 cm),截干高度45 cm次之(6.58 cm),截干高度30 cm最短(4.08 cm);截干高度45 cm1年后萌芽枝条长度最长(139.38 cm),截干高度15 cm次之(122.00 cm),截干高度30 cm最短(112.13 cm)。6 a白木香的萌芽枝条基径随截干高度提高呈递增趋势,而枝条长度呈先低后高趋势。不同施肥方式对于萌芽枝条基径、长度的影响无显著差异,但施肥可促进萌芽枝条生长。

In order to study the effects of truncation and post-truncation fertilization on the germination and growth of Aquilaria sinensis,it was provided technical reference and theoretical basis for the establishment of“Multi-dry”management model and the production of ear-truncation in truncation nursery.The experiment was conducted to study the effects of different cut-off height,age and post-cut fertilization on the number of sprouts and the growth of sprouts in the experimental stands of A.sinensis at the age of 2 a and 6 a.The results showed that the number of sprouts,the diameter and length of sprouts decreased first and then increased with the increasing of cut-off height.The length of 15 cm sprouting branch was the longest(15.10 cm),45 cm second(6.58 cm),30 shortest(4.08 cm)at 4 months,and 45 cm longest(139.38 cm),15 cm second(122.00 cm),30 cm shortest(112.13 cm)at 1 year.The basal diameter of sprouting branches increased with the height of cut-off,while the branch length decreased first and then increased.There was no significant difference in basal diameter and length of sprouting branches among different fertilization methods,but fertilization could promote the growth of sprouting branches.