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題名 | 木本盆栽植物水分監測技術及灌溉策略=Soil Water Monitoring Technology and Irrigation Strategy of Potted Woody Plants |
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作者姓名(中文) | 林連雄; 廖宜健; 張允瓊; | 書刊名 | 宜蘭大學生物資源學刊 |
卷期 | 15 2019.12[民108.12] |
頁次 | 頁1-12 |
分類號 | 435.8 |
關鍵詞 | 金柑; 莖流; 葉片水勢; 土壤含水率; Kumquat; Sap flow; Leaf water potential; Soil water content; |
語文 | 中文(Chinese) |
中文摘要 | 中大型木本盆栽植物為近年來廣泛應用於景觀造景及環境綠美化之素材,然具大量根系及因植體體積較大不易換植等因素限制,中大型盆栽之水分管理為植栽能否成功栽培之關鍵因素之一。本研究以土壤含水率感測裝置進行土壤含水率監測,並據以建立適宜之灌溉策略。裝設土壤含水率感測裝置之金柑盆栽放置於可控制環境溫、濕度之植物生長箱中進行試驗,並同時量測植體之水分生理指標包含莖流量(stem sap flow)、葉片水勢(leaf water potential)及氣孔導度(stomatal conductance),以進行植物水分生理表現比對。試驗結果顯示,感測裝置量測之土壤水分含率與植體之水分狀態具高相關性。當土壤水分充足,金柑放置於光照環境下,植株之莖流量隨照光時間增加而明顯提高,並於正午達高峰;然於無光情況下,莖流量隨即下降並歸零。又於土壤含水率低於10%時,莖流變化不受光線影響,此時植物處於缺水狀態。而葉片水勢在土壤含水率高於10%時,都能維持於-1.0 MPa以上,土壤含水率低於10%時,葉片水勢隨著土壤含水率下降而降低。綜言之,土壤含水率與植物水分狀態具高相關性,即可透過土壤水分監測進行精確之植物水分管理。而在灌溉策略上,可設定18%之土壤含水率為灌溉補水閥值,並依此訂定灌溉策略,進行精準之盆栽灌溉管理。 |
英文摘要 | Medium and large woody potted plants have been widely used in landscape landscaping and environmental greening in recent years. However, due to a large number of roots and limitations of plant size, it is challenging to replace pot soil and resulting plant vigor decrease. The water management of medium and large potted plants is one of the critical factors for the success of the planting. This study used the soil moisture sensing device to monitor soil water content and establish appropriate irrigation strategies accordingly. The potted kumquat with the soil moisture sensing device was placed in a controlled growth chamber. Meanwhile, the values of stem flows, leaf water potentials, and stomatal conductance were also measured. The results show that the soil water content measured by the sensing device had a high correlation with the water state of the plant. When the potted kumquat was under the light and with sufficient soil water content, the stem flow increased significantly with the increase of the illuminated period and reached a peak at noon. However, in the dark, the stem flow dropped and returned to zero. Once the soil water content was lower than 10%, the stem flow was no more changed by light, and the plant was under water stress. When the soil water content was higher than 10%, the leaf water potentials were all above -1.0 MPa; however, if the soil moisture content was lower than 10%, the leaf water potentials decreased with the decrease of soil water contents. In summary, the soil moisture content has a high correlation relationship with the water of the plant; therefore, the right irrigation strategies of potted kumquats may be carried out by the device practical application. Moreover, the soil moisture content of 18% could be set as the irrigation threshold that offers a precise irrigation strategy for potted kumquats. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。