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Simulating water and potassium uptake of greenhouse tomato as a function of salinity stress

文献类型： 外文期刊

作者： Wang, Lichun 1 ; Yermiyahu, Uri 2 ; Yasuor, Hagai 3 ; Ning, Songrui 4 ; Tan, Junli 5 ; Ben-Gal, Alon 2 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Intelligent Equipment Res Ctr, Beijing 100097, Peoples R China

2.Gilat Res Ctr, Agr Res Org Volcani Inst, Soil Water & Environm Sci, Mobile Post, IL-85280 Negev, Israel

3.Gilat Res Ctr, Agr Res Org Volcani Inst, Plant Sci, IL-85280 Negev, Israel

4.Xian Univ Technol, Key Lab Ecohydraul Northwest Arid Reg China, Xian 710048, Peoples R China

5.Ningxia Univ, Coll Civil & Hydraul Engn, Yinchuan 750021, Ningxia, Peoples R China

期刊名称：IRRIGATION SCIENCE （ 影响因子：3.519； 五年影响因子：3.772 ）

ISSN： 0342-7188

年卷期： 2022 年 40 卷 6 期

页码：

收录情况： SCI

摘要： Knowledge regarding uptake of water and nutrients as a function of their status in the soil is critical for smart fertigation management. Of particular interest is the uptake of water and potassium (K), each as a function of root zone salinity. The objective of this study was to quantify the response of tomato water uptake (transpiration) and K uptake to varied levels of K availability combined with salinity. Two independent lysimetric experiments were conducted and used to calibrate and validate models for water and K uptake under varied soil salinity. Tomato water and K uptake were determined by water and nutrient balance using the measured soil water content and K concentration in soil and drainage solution. Tomato water uptake was affected by root zone soil K and salinity. Salinity was the dominant factor driving uptake when irrigation solution had NaCl concentration of over 3 g L-1. Potassium uptake of tomato decreased with decreasing soil K content and increasing soil salinity. The linear relationship between tomato water uptake and K uptake rate was not influenced by soil salinity, indicating that the inhibition of K uptake was probably due to passive uptake of K with the flux of water from soil to roots decreased due to salinity. Tomato water and K uptake were simulated considering the effect of soil solution K concentration under simultaneous K and salinity stresses. Simulated daily average water and K uptake rates agreed well with measured values, with root mean squared error, normalized root mean squared error, and index of agreement of 144 cm(3) d(-1), 20.13% and 0.99 for average daily water uptake; and 24.43 mg d(-1), 29.78% and 0.98 for K average daily uptake rate, respectively. These findings can be used to predict crop water and K requirements under combined salinity and K status conditions, which should contribute to efficient and sustainable fertigation scheduling.

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