荔枝灌溉管理之研究
Other Title
Research on Irrigation Management of Lychee
Start Page
119
End Page
125
ISBN
978-626-446-065-1
Date Issued
2026-07
Author(s)
Abstract
針對荔枝不同物候期設定作物係數，停梢期及花芽分化期為0.4、生殖生長期為0.9、營養生長期0.7以估算荔枝不同生長階段需水量，而荔枝灌溉水量可依據試驗田60 cm深之土壤質地分析，估算土壤有效含水量為144.8 mm，容易有效水分含量為86.9 mm，推算單次灌溉需水量約為102 mm，在2025年降雨量雖高達2504.5mm但降雨分配極不均勻，夏季降雨高度集中5月起雨量倍增至 94.5 mm，隨後進入6月至9月的強降雨期，但秋冬季至隔年春季則面臨嚴峻的氣象乾旱降雨量極度稀少，特別11月至12月幾乎無雨，1月至4月雖有回升但仍維持在低檔，以CROPWAT 8.0分析嘉義農業試驗分所2025年氣象實測數據，可得到推薦灌溉時期為4/21、5/19、9/15、10/8、11/6 及12/15日進行灌溉。
Crop coefficients (Kc) were established for various phenological stages of lychee: 0.4 for the Terminal bud period & Flower bud differentiation period, 0.9 for the reproductive growth stage, and 0.7 for the vegetative growth stage to estimate water requirements at each phase. Based on soil texture analysis at a depth of 60 cm in the experimental field, the Total Available Water (TAW) was estimated at 144.8 mm, with a Readily Available Water (RAW) content of 86.9 mm. Consequently, the calculated water requirement per irrigation event is approximately 102 mm. Although the total annual rainfall in 2025 reached 2504.5 mm, the distribution was extremely uneven. Summer precipitation was highly concentrated, with rainfall doubling to 94.5 mm in May, followed by a period of heavy rainfall from June to September. Conversely, a severe meteorological drought occurred from autumn through the following spring; rainfall was extremely scarce, particularly in November and December, which saw almost no precipitation. While rainfall slightly increased from January to April, it remained at a low level. Finally, using CROPWAT 8.0 to analyze the 2025 measured meteorological data from the Chiayi Agricultural Experiment Branch, the recommended irrigation dates were determined to be April 21, May 19, September 15, October 8, November 6, and December 15.
Subjects
荔枝
灌溉
水分管理
Lychee
Irrigation
Water management
Publisher
農業部農業試驗所
Type
book part
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