Open AccessCalculating the water salt production function parameters of seed maize under water salt combination stress
Author(s) -
Yuan Chi,
Fangjing Xiong
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/330/4/042006
Subject(s) - evapotranspiration , irrigation , yield (engineering) , environmental science , crop , salt (chemistry) , agronomy , crop yield , saline water , calibration , salinity , mathematics , chemistry , materials science , biology , ecology , statistics , metallurgy
In order to explore the relationship between crop yield and water salt stress, field experiments were conducted under deficit irrigation with saline water in Shiyang Rive Basin. It introduced into the crop-water-salt production function. The crop-water-salt production function parameters were calibrated and validated based on the field experiments measured data. The results showed that the simulated evapotranspiration and yield agreed well with the measured values of seed maize at different growth stages. The crop-water-salt production function parameters after calibration and validation were b =6.72, k y1 =0.43, k y2 =0.82, k y3 =1.41, k y4 =0.65, k y5 =0.24, respectively. The yield response factor ( k y ) reflected sensitivity to the seed maize at different growth stages under water salt combination stress. The crop-water-salt production function can well simulate the seed maize evapotranspiration and yield under water salt combination stress after calibration and validation.