ผลของปริมาณแสงที่ได้รับและปุ๋ยที่มีต่อการงอกและการเจริญเติบโตของต้นอ่อนก่อข้าว (Castanopsis indica)

Effect of Light Intensity and Fertilizer on Seed Germination and Seedling Growth of Ko Khao (Castanopsis indica)

Name: ธราทิพย์ ศรีบูรณ์

Name: Tharathip Sriboon

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Ko Khao (Castanopsis indica)

; seed germination

; seedling growth

; survival

; light

Abstract: Ko Khao (Castanopsis indica) is one of the most common plant species in the north and northeastparts of Thailand. Recently, an unsustainable utilization of Ko Khao by the local people such aslogging for mushroom cultivating and fuel has brought about change of microclimate under KoKhao canopy, especially the quantity of light intensity. This factor alone could affect seedgermination, seedling growth as well as ko khao population in the area. This study, therefore aimedto look at the influence of light intensity on Ko Khao seed germination and also its combined effectwith fertilizer on the seedling in nursery green house at Bomuangnoi village, Nahaew district, LoeiProvince. Three levels of light intensity conditions were applied in this study, heavy shade (15 %),partial shade (30 %) and full sun (100 %). The results shows that using paper substrate, lightintensity had no effect on seed germination but did affect the growth in terms of root length. Partialshade condition gave the highest Relative Growth Rate (RGR) (6.56% per day) which wassignificantly different from RGR obtained under heavy shade and full sun condition. For seedgermination on forest soil substrate, light intensity significantly influenced between growth rate interms of height (P< 0.05) but did not affect on survival of 5-month-old seedling. The optimumcondition for shoot emergence and the growth of 5-month-old seedling were full sun condition as itgave the highest number of seed emergence, RGR and the Relative Performance Index (RPI) of76.04%, 411.9 % per year and 95.7%, respectively. While the optimum condition for over 5-montholdseedling was partial shade. The RGR, RPI and survival rate was 243.3 % per year, 66.7 and 71.9%, respectively. In addition, at each light intensity application of slow release (14-14-14) fertilizer (52 g.m2 every 3 month) and fast release (15-15-15) fertilizer (17 g.m2 at every 15 days) for 1 year did not significantly affect the survival and relative growth rate in terms of stem especially for over 5-month-old seedling (p > 0.05). RGR in terms of stem, height and leaf area of seedling growth under full sun with or without fertilizer, however, were lower when compared with those planted under both partial shade and heavy shade. Under partial shade or heavy shade conditions, RGR and RPI in terms of stem, height and leaf area of seedling were not significantly different (p > 0.05). It could be concluded that the optimum condition for Ko Khao seedling over 5-month-old seedling is partial shade condition with or without fertilizer or nutrients fill up.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

Email: info.lib@mail.kmutt.ac.th

Name: สุดารัตน์ ตรีเพชรกุล

Role: อาจารย์ที่ปรึกษา

Created: 2545

Issued: 2005-11-11

Modified: 2559-02-01

วิทยานิพนธ์/Thesis

ISBN: 9749605209

CallNumber: NRM69

tha

DegreeName: วิทยาศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: การจัดการทรัพยากรชีวภาพ

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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