Abstract
Assessing and optimizing crop management strategies, e.g. irrigation and nitrogen (N) fertilization, is critical for the sustainable production of crops. Currently, crop simulation models combined with experimental data have been proved to be effective tools. Herein, the FAO AquaCrop model was calibrated and validated based on field-measured data during two consecutive growing seasons (2020 and 2021) for predicting canopy cover (CC, %), aboveground biomass and soil water content (SWC, mm) on a daily scale, and for simulating final fruit yield, evapotranspiration (ET, mm) and water productivity (WP, kg m−3) on a seasonal scale under plastic film mulch condition. The two-year experiment included three irrigation levels (60 %, 80 % and 100 % ET0, where ET0 is the reference evapotranspiration) and five N fertilizer rates (0, 180, 270, 360 and 450 kg N ha−1). In general, the AquaCrop model adequately simulated the dynamic changes of cherry tomato CC, aboveground biomass and final fruit yield. Nonetheless, the model severely overestimated SWC especially under full irrigation in the two-year experiment, and the simulation accuracy gradually increased with the increase of N rate. For ET, it was largely underestimated. With the decrease in irrigation level and N rate, the simulation accuracy improved and the impact of water stress was stronger than that of nitrogen stress. The simulation accuracy of WP decreased as irrigation level and N rate increased. The optimal integrated regime was deficit irrigation of 80 % ET0 combined with N rate of 360 kg ha−1 (I80N360), which obtained 98.24 % of potential yield while significantly decreasing water input. The simulation of the mulched module and parameters of the AquaCrop model (crop transpiration, water productivity, etc.) should be further optimized and verified. If these improvements can be made, the AquaCrop model can be used in the decision-making of irrigation and N fertilization strategies of cherry tomato under plastic film mulch condition.
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Claims 10
Claim · model-written summary
AquaCrop adequately simulated cherry tomato canopy cover, biomass and fruit yield.
- Taxon
- cherry tomato
Solanum lycopersicum var. cerasiformee0 - Outcome
- CC, aboveground biomass and final fruit yielde0
- Comparator
- adequately simulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the AquaCrop model adequately simulated the dynamic changes of cherry tomato CC, aboveground biomass and final fruit yield”
Claim · model-written summary
AquaCrop severely overestimated soil water content, especially under full irrigation.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Outcome
- SWCe0
- Direction
- overestimatede0
- Comparator
- full irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the model severely overestimated SWC especially under full irrigation in the two-year experiment”
t0“cherry tomato”
Claim · model-written summary
Soil water content simulation accuracy increased with nitrogen rate.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- N ratee0
- Outcome
- simulation accuracye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the simulation accuracy gradually increased with the increase of N rate”
t0“cherry tomato”
Claim · model-written summary
AquaCrop largely underestimated evapotranspiration.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Outcome
- ETe0
- Direction
- underestimatede0
- Comparator
- underestimatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For ET, it was largely underestimated”
t0“cherry tomato”
Claim · model-written summary
ET simulation accuracy improved as irrigation and nitrogen rates decreased.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- irrigation level and N ratee0
- Outcome
- simulation accuracye0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the decrease in irrigation level and N rate, the simulation accuracy improved”
t0“cherry tomato”
Claim · model-written summary
Water stress affected simulation accuracy more strongly than nitrogen stress.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Outcome
- impact of water stresse0
- Direction
- strongere0
- Comparator
- nitrogen stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the impact of water stress was stronger than that of nitrogen stress”
t0“cherry tomato”
Claim · model-written summary
Water productivity simulation accuracy decreased as irrigation and nitrogen rates increased.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- irrigation level and N ratee0
- Outcome
- simulation accuracy of WPe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation accuracy of WP decreased as irrigation level and N rate increased”
t0“cherry tomato”
Claim · model-written summary
The 80% ET0 and 360 kg ha−1 nitrogen regime obtained 98.24% of potential yield.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- deficit irrigation of 80 % ET0 combined with N rate of 360 kg ha−1e0
- Outcome
- yielde0
- Direction
- optimale0
- Value
- 98.24 %e0
- Comparator
- potential yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal integrated regime was deficit irrigation of 80 % ET0 combined with N rate of 360 kg ha−1 (I80N360), which obtained 98.24 % of potential yield while significantly decreasing water input”
t0“cherry tomato”
Claim · model-written summary
The optimal regime significantly decreased water input.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- deficit irrigation of 80 % ET0 combined with N rate of 360 kg ha−1e0
- Outcome
- water inpute0
- Direction
- decreasinge0
- Comparator
- potential yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal integrated regime was deficit irrigation of 80 % ET0 combined with N rate of 360 kg ha−1 (I80N360), which obtained 98.24 % of potential yield while significantly decreasing water input”
t0“cherry tomato”
Claim · model-written summary
The authors recommend further optimization and verification of the AquaCrop mulch module and parameters.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Outcome
- should be further optimized and verifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation of the mulched module and parameters of the AquaCrop model (crop transpiration, water productivity, etc.) should be further optimized and verified”
t0“cherry tomato”
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See all 344 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.