Study on the structure of mixed bamboo.
Take the structure of bamboo in jiangsu province as an example
Mixed bamboo has both the structural characteristics of loose bamboo and tufted bamboo, but little research has been done. Tea straw bamboo is a kind of mixed bamboo with important economic, ecological and social value introduced by Mr. Zhou fangchun to jiangsu province in 1974. The growth performance in the past 50 years indicates that the tea culm and bamboo have been successfully introduced into jiangsu province in the north, with good growth, safe wintering and successful introduction. However, no data have been reported on its growth performance in jiangsu province. Therefore, the structure of the above-ground and underground bamboo forests was investigated for the tea culm and bamboo groves in the shu forest farm and the dayu bamboo garden of jiangdu in jiangsu province.
There was no significant difference in plant height, canopy width, node length, number of nodes, number of branches, thickness of culm wall, biomass and other structural factors between lower shu and dayu. The plant height was 4.67-5.10m, both of which were 4.87m. The ground diameter was 3.50-5.70cm, with an average of 4.50cm. Chest diameter: 1.20-1.90cm, average: 1.60cm; Section length: 20.5-22.0cm, both 21.2cm, section number: the 8th section is the longest, up to 27.2cm. The average tea straw and bamboo root in two places is 23 knots, 20-27 knots. Culm wall thickness 2.7-2.9mm, mean 3.0cm, maximum 3.3cm; The hm2 (dry weight) is 120980.8kg-135460.8kg, which is slightly smaller than the tea culm bamboo of guangning, guangdong.
Both tea stalk bamboo stem thick, significant difference was found in diameter at breast height, under branch height, ground diameter, probably because dayu w, introduced in 2007 from nanjing, and as the garden nursery, its take large amount of seedling, high strength, small plants; However, the lower shu tea stalk bamboo forest was introduced early and has been in the wild state.
For the first time, the underground structural characters of tea culm bamboo including hybrid structure were determined and analyzed. The underground culm base of tea culms and bamboo has 5-7 sections, with a length of 6.60-12.60cm and a length of 9.60cm. Thickness 1.5-14.4mm, mean value 7.6mm. Stalks without buds or roots, as long as a few membranous inclusions of the false whip length 1.02-1.98cm, average 1.38cm, linked to the bamboo whip (underground stem). The length of bamboo whip was 2.6-4.2cm/ penis, with an average length of 3.9cm. Contend number 19-36 root/node, average 21 root; The number of whips was 27 to 45, with an average of 37. Among them, Culm base length, There were significant differences in root thickness, stump number and whip number, but no significant differences in root number, stalk number and total length. Compared with dayu’s bamboo stump, the bamboo stump in lower shu was larger/thicker/longer, but the length and number of false whip in both places seemed not affected by the character of bamboo stalk.
Key words：Jiangsu； Pseudosasa amabilis； Mixed bamboo； The ground； underground