ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Selection of the Most Appropriate Coating Particle Film for Improving Photosynthesis in Mango)

ผู้เขียน:Teerarat Chamchaiyaporn, ดร.คณพล จุฑามณี, ศาสตราจารย์, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, ดร.พิลาณี ไวถนอมสัตย์

สื่อสิ่งพิมพ์:pdf

Abstract

Incremental irradiation, especially during summer, decreases net photosynthesis. Sunburn causes damage to leaves and fruit and consequently decreases the fruit yield and quality. Trials have reported success in using particle film technology for coating fruit tree leaves to remedy these adverse effects of strong summer irradiation. The objectives of this experiment were to compare the suspension properties, precipitation and light transmission of four coating materials—kaolin, bentonite, calcium carbonate and dolomite—and to study the leaf coating properties by measuring photosynthesis after the application of materials. The results showed that 60 g.L-1 kaolin had good suspension in water and was the slowest to precipitate. Kaolin was the most effective leaf coating material to reduce transmission through a glass plate by 70.14%. The average percentage of photosynthetic photon flux through a glass plate for bentonite, calcium carbonate and dolomite was 93.50, 92.28 and 86.78%, respectively. Mango leaves sprayed with kaolin had higher average net photosynthesis (Pn), stomatal conductance (gs) and transpiration rate (E) than in bentonite and untreated leaves which had significantly different average values for Pn, gs and E. Therefore, kaolin was suitable for use as a coating material on mango leaves.

Article Info

Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 047, Issue 3, May 13 - Jun 13, Page 323 - 332 |  PDF |  Page

ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Kaolin Clay Coating on Mango Leaf Gas Exchange, Fruit Yield and Quality)

ผู้เขียน:Teerarat Chamchaiyaporn, ดร.คณพล จุฑามณี, ศาสตราจารย์, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, ดร.พิลาณี ไวถนอมสัตย์, Charun Henpitak

สื่อสิ่งพิมพ์:pdf

Abstract

The depressions of midday net photosynthesis (Pn) and stomatal conductance (gs) in mango are related to environmental stresses such as high temperature and drier conditions at this time. Kaolin, a white clay, has been used to mitigate the negative effects of those stresses on plant physiology and productivity. The objectives of this experiment were to study the effects of a kaolin leaf coating on photosynthesis in term of the gas exchange, fruit yield and quality in mango (Mangifera indica L.) cv. Mahajanaka. The results showed that a kaolin coating on the mango leaves could insulate against high irradiance, reduce leaf temperature (Tleaf), and decrease VPDleaf-air as Tleaf was decreased, which resulted in increasing both Pn and gs. The total number of fruit and the total fruit weight from the kaolinsprayed mango trees were increased by 40.79% and 44.40%, respectively. Furthermore, kaolin coating affected the ripe fruit peel colors, especially redness, and reduced the severity of anthracnose and fruit rot during the post-harvest ripening period. This suggested that kaolin coating could be considered as a useful technology for improving mango plant photosynthesis and quality in an environment of high temperature and excess solar radiation.

Article Info

Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 047, Issue 4, Jul 13 - Aug 13, Page 479 - 491 |  PDF |  Page