Chemical Changes With Maturation Of The Bamboo Species Phyllostachys Pubescens

Li, X.B., and Shupe, T.F., and Peter, G.F., and Hse, C.Y., and Eberhardt, T.L., (2007) Chemical Changes With Maturation Of The Bamboo Species Phyllostachys Pubescens. Journal of Tropical Forest Science, 19 (1). pp. 6-12. ISSN 0128-1283

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Affiliations

Louisiana State University Agricultural Center, School of Renewable Natural Resources
Louisiana State University Agricultural Center, School of Renewable Natural Resources
University of Florida, School of Forest Resources and Conservation, USA
USDA Forest Service, Southern Forest Research Station, USA
USDA Forest Service, Southern Forest Research Station, USA

Abstract

Bamboo chemical properties were measured at three different heights from one-, three- and five-year-old plants and at three different radial positions from the three-year-old culms of Phyllostachys pubescens grown in south-eastern USA. Small but significant increases in holocellulose and α-cellulose contents were detected from the base to the top of the culm at all three ages. In contrast, no significant differences in Klason lignin and ash were detected. The increases in carbohydrate content with age correlated with increases in specific gravity. Alcohol-toluene extractive content increased from the base to the top of the stem in the three-year-old and five-year-old bamboo and showed
a continuous increase with age. The epidermis had the highest extractive and ash contents and the lowest
holocellulose and α-cellulose contents. The outer layer of the stem had the highest holocellulose, α-cellulose
and Klason lignin contents and the lowest extractive and ash contents. The chemical content and specific gravity of bamboo stabilizes at about three years of age, which is an appropriate time for harvesting.

Sifat kimia buluh Phyllostachys pubescens yang berusia satu
tahun, tiga tahun dan lima tahun yang ditanam di tenggara Amerika Syarikat disukat pada tiga ketinggian yang berbeza. Selain itu, bagi pokok yang berusia tiga tahun, sukatan juga dibuat pada tiga kedudukan radial yang berlainan. Peningkatan kecil tetapi signifikan dalam jumlah holoselulosa dan α-selulosa dikesan dari dasar ke bahagian atas kulma buluh yang berlainan usia itu. Sebaliknya tiada perbezaan signifikan direkod bagi jumlah lignin Klason dan abu. Kandungan karbohidrat yang meningkat mengikut usia berkait rapat dengan peningkatan graviti tentu. Kandungan ekstrak alkohol-toluena meningkat dari dasar ke bahagian
atas batang buluh yang berusia tiga tahun serta lima tahun dan menunjukkan peningkatan yang berterusan mengikut usia. Epidermis mempunyai kandungan ekstrak serta abu yang paling tinggi dan kandungan holoselulosa serta α-selulosa yang paling rendah. Lapisan luar batang mempunyai kandungan holoselulosa, α-selulosa dan lignin Klason yang tertinggi tetapi kandungan ekstrak dan abu yang terendah. Kandungan
kimia serta graviti tentu buluh menjadi stabil pada usia tiga tahun, iaitu ketika buluh sesuai dituai.

Item Type:

Journal

Keywords:

Anatomy, ash, cellulose, chemical analysis, extractives, lignin

Subjects:

S Agriculture, Forestry

ID Code:

8899