Using field measurements and FAO-56 model to assess the eco-physiological response of citrus orchards under regulated deficit irrigation

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• 作者：Giovanni Rallo^a ; ^{giovanni.rallo@unipi.it} ; ^{giovanni.rallo80@gmail.com} ; Pablo Gonzá ; lez-Altozano^b ; ^{pgaltozano@agf.upv.es} ; Juan Manzano-Juá ; rez^b ; ^{juamanju@agf.upv.es} ; Giuseppe Provenzano^c ; ^{giuseppe.provenzano@unipa.it}
• 关键词：FAO-56 model ; Midday stem water potential ; Regulated deficit irrigation ; Water stress function ; Citrus
• 刊名：Agricultural Water Management
• 出版年：2017
• 出版时间：31 January 2017
• 年：2017
• 卷：180
• 期：part_PA
• 页码：136-147
• 全文大小：2799 K
• 卷排序：180

文摘

A strong correlation existing between the water stress integral and the applied irrigation depth. Water stress integral can be used to predict the seasonal irrigation volumes to be provided when a desired crop stress level is required. When the values of soil water depletion (D) are below a critical threshold of 20 mm, midday stem water potentials (MSWP) resulted linearly decreasing at increasing D, as a consequence of the gradually rising crop water stress. FAO-56 model is able to predict, with reasonable accuracy, the average SWC in the root zone (RMSE = 0.04 m3 m−3). Temporal variability of MSWP can be explained by the dynamic of simulated Ks.