Stem water potential estimation of drip-irrigated early-maturing peach trees under Mediterranean conditions
Stem water potential estimation of drip-irrigated early-maturing peach trees under Mediterranean conditions
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DOI：
10.1016/j.compag.2015.03.004
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发表时间：
2015-06-01
影响因子：
8.3
通讯作者：
Carmen Ruiz-Sanchez, Ma
中科院分区：
文献类型：
--
作者：
Abrisqueta, Isabel;Conejero, Wenceslao;Carmen Ruiz-Sanchez, Ma
在过去的十年里，亏缺灌溉策略使种植者能够解决水资源短缺的问题，而监测茎的水势(psi(茎))被认为是最大化水果产量和质量的关键。然而，由于测量psi(茎)所涉及的密集劳动，替代方法是可取的。本试验在西班牙穆尔西亚以成年桃树(Prunus persica(L.)巴奇cv.福乐达)接受不同的滴灌处理，用压力室测量psi(茎)，用中子探头测量土壤水分。记录了农业气象变量。茎水势的季节变化规律为桃树的灌溉管理提供了一个有用的诊断工具。降雨事件和秋季盛行的气象条件表明，所研究的桃树品种具有弹性。通过线性回归分析拟合茎与土壤和大气的关系，得到了显著的相关性，其中土壤水分是估算茎的主要贡献者。线性回归分析强调了将植物水分状况作为桃树品种、发育的大气条件和灌溉导致的土壤水分条件的函数来考虑的重要性。基于土壤剖面中的土壤水分、平均日空气蒸气压差(VPDm)和生长度小时数(GDH)数据建立的多元线性回归方程可以解释psi(STEM)的72%的方差，并被建议作为psi(STEM)田间测量的替代。(C)2015爱思唯尔B.V.保留所有权利。
In the last decade deficit irrigation strategies allowed growers to deal with water shortages, while monitoring stem water potential (psi(stem)) is deemed essential for maximising fruit yield and quality. However, because of the intensive labour involved in measuring psi(stem), alternative methods are desirable. The experiment described was conducted in Murcia (Spain) with adult peach trees (Prunus persica (L.) Batsch cv. Flordastar) submitted to different drip irrigation treatments, measuring psi(stem) with a pressure chamber and the soil water content with a neutron probe. Agro-meteorological variables were recorded. Seasonal patterns of stem water potential provide a useful diagnostic tool for irrigation management in peach trees. Rainfall events and the meteorological conditions prevailing in autumn pointed to the resilient nature of the peach cultivar studied. Fitting psi(stem) by linear regression analysis as a function of soil and atmosphere yielded a significant correlation, with the soil water content being the main contributor to estimating psi(stem). Linear regression analysis highlighted the importance of considering plant water status as a function of the peach tree cultivar, the atmospheric conditions in which it develops and the soil water conditions resulting from irrigation. A multiple linear regression equation based on soil water content in the soil profile, mean daily air vapour pressure deficit (VPDm) and growing degree hours (GDH) data explained 72% of the variance in psi(stem), and is proposed as an alternative to the field measurement of psi(stem). (C) 2015 Elsevier B.V. All rights reserved.