Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
COLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors D.2009J 5^/«9.37Ỉ ốỉ>9^DISSERTATIONSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSSubmitted by Truong Xuan Le Forest, Rangeland, and Watershed StewardshipIn partial fulfillment of the requirements For the degree of Doctor of Philosophy Colora Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors do State University Fort Collins, Colorado Spring 2009COLORADO STATE UNIVERSITY39856WE HEREBY RECOMMEND THAT THE DISSERTATION PREPARED UNDER OUR SUPERStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
VISION BY TRUONG‘XUAN LE ENTITLED STUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORS BE ACCEPTECOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors F DISSERTATIONSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSWhite bamboo is one of the most popular and valuable forest products in mountainous areas of Northern Vietnam. Because of its commercial and economic values white bamboo has been pl Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors anted widely in recent decades. Three levels of white bamboo management are- common: pure plantations of bamboo with very little management investmentStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
, pure plantations with intensive management, and mixed plantations of bamboo with broad-leaved trees species. Most plantations are bamboo monocultureCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors yield, low economic revenue, reduced soil fertility, and high risk of disease.Long-term, sustainable management of white bamboo plantations will require improved knowledge about the ecological features of white bamboo in relation to growth. I examined patterns of bamboo growth and light interception Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors in relation to topographic position and management intensity. 1 also determined how ecological factors relate to white harnboo growth, identifying poStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
ssible nutrient limitation, and the efficiency of light use as a factor explaining growth patterns.Topographic position had strong effects on white baCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors ltops in two these areas were in total culmiiivolume (42%) in 3-year-and-younger, DBH and height, and number of economically valuable culms in both all-age and 3-year-and-youngcr calculations.Management intensity.had significant effects on ĐBH and height in Luong Son-Hoa Binh. Management intensity a Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors lso affected on total culm volume and culm wall volume in Cau Hai-Phu Tho and Ngoc Lac-'Thanh Hoa, as well as on dry culm mass in Cau Hai-Phu Tho. PurStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
e intensive management had greatest wliite bamboo growth among the three management intensities.Topographic position significantly affected culm volumCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors light use efficiency in both Cau Hai-Phu Tho and Ngoc Lac-Thanh Hoa. Management intensity affected culm DBH light use efficiency in Cau Hai-Phu Tho and Luong Son-Hoa Binh; on culm height light use efficiency in Luong Son-Hoa Binh; on culm volume, culm wall volume; and on dry culm mass light use effi Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors ciencies in Cail Hai-Phu Tho.The 29 plots spanned a range of soil and site conditions, and 1 examined growth (total culm volume, culm wall volume, dryStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
culm mass, and number of economic valuable •f-culm) in relation to soil moisture, density, bulk density, porosity, pH, organic matter, SiOl, total anCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors tion with soil pH, and a moderate correlation with pH was also demonsưated by dry culm mass. The number of economically valuable culms correlated- moderately with soil pH and cation exchange capacity. A fertilization experiment of 4 fertilizers (nitrogen, potassium, phosphate, and N+P+K) in 12 plots Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors in Cau Hai showed a growth increase in response toivN (for total culm volume, culm wall volume, and dry culm mass growth). The effects of other fertiStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
lizers were not significant, perhaps in part because of very high variation in growth among plots and limited time (one growing season). Light interceCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors ght captured by non-bamboo vegetation in the plots.In general, this study supported the hypothesis that topographic position and management intensity strongly influence white bamboo growth. Total culm volume %correlated well with soil moisture, underscoring the fundamental importance of water supply Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors in sustaining bamboo growth. Soil pH had strong and medium positive relationships with culm wall volume and dry culm mass, respectively. Number of ecStudy on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors
onomic valuable culm had medium regression with soil pH and cation exchange capacity. There was a difference in white bamboo growth across four fertilCOLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.D Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors h white bamboo growth features (total culm volume, culm wall volume, dry culm mass, and number of economic value culm) and most ọf these regressions were not significant.Truong Xuan Le Forest, Rangeland & Watershed Stewardship Colorado State University Fort Collins, co 80523 Spring 2009 Study on the growth of white bamboo (dendrocalamus membranaceus munro) under different ecological factors COLORADO STAKE UNIVERSITYSTUDY ON THE GROWTH OF WHITE BAMBOO (Dendrocalamus membranaceus Munro) UNDER DIFFERENT ECOLOGICAL FACTORSTRUONG XUAN LE. Ph.DGọi ngay
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