Growing Degree Day Applied in Forage Management of Nilegrass

有效積溫在尼羅草栽培管理之應用

許福星(Fu-Hsing Hsu) ； 張世融(Shyh-Rong Chang) ； 洪國源(Kuo-Yuan Hong)

《作物、環境與生物資訊》 2卷1期 (2005/03) Pp. 87-92

https://doi.org/10.30061/CEB.200503.0009

摘要

尼羅草(Acroceras macrum Stapf)在臺灣是一種新興的牧草品種，本試驗研究的目的乃在探討尼羅草生長所需的最低溫度及應用有效積溫(GDD)於該品種的栽培管理上。尼羅草生長所需的最低溫度經估算為8.4℃，以GDD 估算尼羅草乾物產量的準確度，能如同以GDD、降雨量及日射量等三者一起估算者。尼羅草於4、6、8及10週收割之GDD平均分別為474.9、707.6、907.8及1187.3℃。同時尼羅草的乾物產量也能以GDD及施N量來估算，不管其降雨量、日射量及生長地區為何。建議GDD可用來估算尼羅草乾物產量，以及應用於該品種的栽培管理方面。

關鍵字

尼羅草 ； 有效積溫 ； 最低溫度 ； 乾物產量

並列摘要

Nilegrass (Acroceras macrum Stapf) is a new forage species grown in Taiwan. Objectives of this study were to determine the base temperature required for plant growth of nilegrass and to apply growing degree day (GDD) in forage management of nilegrass. The base temperature estimated for plant growth of nilegrass was 8.4℃. The dry matter yield of nilegrass could be estimated accurately by the linear regression equation made from GDD. The result was similar to that estimated by the linear regression equation made from GDD, precipitation, and solar radiation. The average GDDs of nilegrass for cutting at 4, 6, 8 and 10 weeks were 474.9, 707.6, 907.8 and 1,187.3℃, respectively. The dry matter yield of nilegrass could also be estimated accurately by the linear regression equation made from GDD and by N application rates, regardless of precipitation, solar radiation and location. Results suggest that GDD could be used to estimate the dry matter yield of nilegrass and be applied in forage management of this species.

並列關鍵字

Acroceras macrum ； Growing degree day ； Base temperature ； Dry matter yield