Table 1.
Water and nitrogen levels in different treatments.
Fig 1.
Changes in soil water content during the experiment.
Data are presented as the mean ± SE (n ≥ 27).
Table 2.
ANOVA results for comparison of tuber yield and other relevant parameters at different DAT.
DAT represents days after transplanting into soil.
Fig 2.
Tuber yield of potato at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 8).
Table 3.
Pearson correlation coefficients among tuber yield and some relevant parameters during the tuber bulking stage.
Fig 3.
Net photosynthetic rate at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 5).
Fig 4.
Total leaf area at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 8).
Fig 5.
Aboveground biomass (leaves + aboveground stems) accumulated at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 5).
Fig 6.
Non-structural reserves content in leaves and underground stems at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 3).
Fig 7.
The distribution of number and weight of tubers at different DAT under different treatments.
Abscissa represents fresh weight of each tuber, and ordinate represents the tuber number under this weight. DAT represents days after transplanting into soil, and each treatment includes 8 plants.
Fig 8.
Nitrogen content in different organs at different DAT under different treatments.
DAT represents days after transplanting into soil. All data are presented as the mean ± SE (n = 3).