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โครงการรวบรวมและจัดทําวารสารอิเล็กทรอนิกส์ มหาวิทยาลัยเกษตรศาสตร์
์
Thai J. For. 33 (1) : 36-46 (2014) วารสารวนศาสตร 33 (1) : 36-46 (2557)

นิพนธ์ต้นฉบับ

การประยุกต์ การสุ่มตัวอย่างแบบกลุ่มปรับในการประเมินของป่า ณ ป่าสาธิต และ
ต้นแบบของคณะป่าไม้ มหาวิทยาลัยแห่งชาติลาว

Application of Adaptive Cluster Sampling for Non-timber Forest Products
Assessment in Training and Model Forest, Faculty of Forestry,
National University of Laos

*
ค�าเพ็ชร พรหมภูมี Khamphet Phomphoumy *
วีระภาส คุณรัตนสิริ Weeraphart Khunrattanasiri
สันติ สุขสอาด Santi Suksard

คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ จตุจักร กรุงเทพฯ 10900
Faculty of Forestry, Kasetsart University, Chatuchak, Bangkok, 10900 Thailand
*Corresponding Author, E-mail: khamphet2000@hotmail.com

รับต้นฉบับ 3 ธันวาคม 2555 รับลงพิมพ์ 11 มกราคม 2556

ABSTRACT

The aim of this study were to assessment the quantity of non-timber forest prodwcts
namely: rattan (Calamus viminalis willd.), sugar pqüm (Tao) (Armnga westerhoulii Griff.), and
Hem (Goscinium fernestratum Colebr.) by employed adaptive cluster sampling (ACS) and simple
random wampling (SRS), The size of sample area sas fixed at 1.25 percent of the total area.
The sampling plot was a rectangle with measuring sire of 20 m × 25 m. THe sampling without
replacement consist 100 initial sampling plots were used tï collect data. Statistical methods used
in the analysir were frequency, percent, mean, variance, sampling errors, coefficaent variation.
The result of ACS study, there”were 57 network consisting 179 plots in which 224 clumps
or 1,085 culms of rattan were found, making up 38.14 percent. The average value was 176.69
culms per ha and its variance value was 1.46. For Tao, there are 152 clumps or 667 culms, which
was about 23.44 percent. The average value was 164.69 culms per ha and its variance value was
5.32. For Hem, there were 198 clumps or 1,093 culms with the percentage of 38.42. The average
value was 214.31 culms per ha and its variance value was 5.57. The result of SRS consisted of
100 plots in which 115 clumps or 539 culms of rattan were found, making up 40.31 percent.
The average value was 171.13 culms per ha with the variance value of 42.77. The analysis also
revealed that 71 clumps or 331 culms of Tao were found, making up 24.76 percent. The average
value was 165.50 culms per ha with the variance value of 47.18. The analysis also found 89
clumps or 467 culms of Hem, making up 34.93 percent. The average value was 203.06 culms
per ha with the variance value of 41.73.