Investigation on Planting Adaptability of Camellia oleifera Clones Xianglin Series
[Objective]The aim was to understand and evaluate the performance of improved varieties of Camellia oleifera clones Xianglin series in the transformation of C.oleifera low-yield forest varieties in the mountainous area of northern Guangxi.[Method]In 2013 and 2015-2023,Sanjiang county forestry science and technology workers tracked and measured the affinity and growth characteristics of the high-grafting and crown-replacement rootstocks and scions,and the growth of the regeneration afforestation of the local introduced C.oleifera clones Xianglin series,as well as the main economic traits and yield of fruits in the high-yield period of the high-graft crown-replacement demonstration forest and the improved variety renewal C.oleifera forest.[Result]The average healing rate and bud(plant)survival rate of the first year after high-grafting and crown-replacement of C.oleifera clones Xianglin series were 70%-80%.In the third year,the average crown height of C.oleifera was 1.02 m,the average crown area per plant was 0.72 m2,and the average flowering and fruiting rate per plant was 74.00%.The average fruit yields of Xianglin 4 and Xianglin XLC15 in 8 years were 2 987.85 kg/hm2 and 3 631.05 kg/hm2,respectively,which were 12.86%and 37.16%higher than those of the small fruit C.oleifera tree(the rootstock control).The average oil yield of Xianglin 4 and Xianglin XLC15 in 8 years was 158.40 kg/hm2 and 279.60 kg/hm2,respectively,which was 3.39%lower and 70.54%higher than that of the small fruit C.oleifera tree(the rootstock control).The crown area of 3-year-old C.oleifera clones Xianglin series was 0.69 m2,the tree height was 1.11 m,and the ground diameter was 18.89 mm.The average fruit yield of 4-5 years old C.oleifera forest was 2.5-247.5 kg/hm2,and the average oil yield was 0.01-1.37 kg/hm2,which was extremely low.The average fresh seed rate was 40.15%,the average kernel oil content was 48.72%,the average fruit oil content was 6.69%,the average fruit yield and oil yield were more than 4 500 kg/hm2 and 300 kg/hm2,respectively,which were more than 2 times of the control variety.The fruit yield and oil yield of C.oleifera clones in Xianglin series were the highest at 114 m altitude,reaching 17 640.00 kg/hm2 and 1 227.90 kg/hm2,respectively.[Conclusion]The improved varieties of C.oleifera clones Xianglin series are not suitable for high-grafting and crown-replacement of low-yield C.oleifera forest in Sanjiang county,which is suitable for the renewal and transformation of low-yield C.oleifera forest.Higher yield can be obtained by planting in areas with an altitude of less than 300 m.
万方数据
维普
