Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
Abstract
:1. Introduction
2. Materials and Methods
2.1. Site Description
2.2. Pot Establishment and Plant Cultivation
2.3. Experimental Design and Management
- (1)
- Control treatment (without water stress), keeping 2–3 cm water level above the soil surface;
- (2)
- Nine DFAA treatments, combined with drought degree (50%, 60% and 70% of field capacity (FC)), drought duration (5, 10 and 15 days), flooding degree (1/2, 3/4 and 1/1 of plant height) and flooding duration (5, 7 and 9 days) according to the standard orthogonal table (L9 (34));
- (3)
- Nine drought alone treatments, drought stage following the same as DFAA treatments and the other stages following the same as the control treatment;
- (4)
- Nine flooding alone treatments, flooding stage following the same as DFAA treatments and the other stages following the same as the control treatment.
2.4. Sampling and Measurements
2.4.1. Shoot and Root Sampling
2.4.2. Chemical Analysis and Calculation
2.5. Statistical Analysis
3. Results
3.1. Morpho-Agronomic Traits
3.1.1. Biological Yield
3.1.2. Root Morphology
3.2. Accumulation and Partitioning of N, P and K
3.3. N, P and K Uptake and Use Efficiencies
4. Discussion
4.1. Co-Occurring Drought and Flooding Altered Biomass Accumulation and Partitioning
4.2. Co-Occurring Drought and Flooding Altered N, P and K Uptake and Utilization
4.3. Influence of Root Plasticity on N, P and K Uptake and Utilization
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
DFAA | drought–flood abrupt alternation or drought followed by flood |
D | drought followed by no flood |
F | no drought followed by flood |
FC | field capacity |
N | nitrogen |
P | phosphorus |
K | potassium |
DW | dry weight |
GY | grain yield |
RLD | root length density |
SRL | specific root length |
RMD | root mean diameter |
RSA | root surface area |
RV | root volume |
S/V | ratio the ratio of root surface area and root volume |
UE | use efficiency |
SAR | specific absorption rate |
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Treatment | Drought Phase (Stage I) | Flooding Phase (Stage II) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drought Degree (% FC) | Duration (/D) | Beginning and Ending Dates (Mon/D) | Flooding Degree (/Plant Height) | Duration (/D) | Beginning and Ending Dates (Mon/D) | |||||
2016 | 2017 | 2018 | 2016 | 2017 | 2018 | |||||
DFAA1 | 50(severe) | 5 | 7/25–7/29 | 7/30–8/3 | 7/28–8/1 | 1/1(heavy) | 7 | 7/30–8/5 | 8/4–8/10 | 8/2–8/8 |
DFAA2 | 50(severe) | 10 | 7/25–8/3 | 7/25–8/3 | 7/23–8/1 | 1/2 | 9(heavy) | 8/4–8/12 | 8/4–8/12 | 8/2–8/10 |
DFAA3 | 50(severe) | 15 | 7/25–8/8 | 7/20–8/3 | 7/18–8/1 | 3/4 | 5(light) | 8/9–8/13 | 8/4–8/8 | 8/2–8/6 |
DFAA4 | 60(middle) | 5 | 7/25–7/29 | 7/30–8/3 | 7/28–8/1 | 3/4 | 9(heavy) | 7/30–8/7 | 8/4–8/12 | 8/2–8/10 |
DFAA5 | 60(middle) | 10 | 7/25–8/3 | 7/25–8/3 | 7/23–8/1 | 1/1(heavy) | 5 | 8/4–8/8 | 8/4–8/8 | 8/2–8/6 |
DFAA6 | 60(middle) | 15 | 7/25–8/8 | 7/20–8/3 | 7/18–8/1 | 1/2(light) | 7 | 8/9–8/15 | 8/4–8/10 | 8/2–8/8 |
DFAA7 | 70(mild) | 5 | 7/25–7/29 | 7/30–8/3 | 7/28–8/1 | 1/2 | 5(light) | 7/30–8/3 | 8/4–8/8 | 8/2–8/6 |
DFAA8 | 70(mild) | 10 | 7/25–8/3 | 7/25–8/3 | 7/23–8/1 | 3/4 | 7(light) | 8/4–8/10 | 8/4–8/10 | 8/2–8/8 |
DFAA9 | 70(mild) | 15 | 7/25–8/8 | 7/20–8/3 | 7/18–8/1 | 1/1(heavy) | 9 | 8/9–8/17 | 8/4–8/12 | 8/2–8/10 |
Drought alone | D1~D3, D7~D9 (2016) D1~D9 (2017, 2018) | Continuous flooding (2~3 cm) | ||||||||
Flooding alone | Continuous flooding (2~3 cm) | F1~F3, F7~F9 (2016) F1~F9 (2017, 2018) | ||||||||
Control | Continuous flooding (2~3 cm) |
Treatment | Biomass (Partitioning) | Yield and Its Components | |||||||
---|---|---|---|---|---|---|---|---|---|
Root DW | Stem DW | Leaf DW | Panicle DW | Root/Shoot | Panicles | Spikelets | Filled Grains | Yield | |
g/pot (%) | g/pot (%) | g/pot (%) | g/pot (%) | g/g | /pot | /Panicle | % | g/pot | |
Control | 18.6 (5.6) A | 126.7 (38.2) C | 42.3 (12.7) B | 144.2 (43.5) A | 0.0592 A | 30.3 A | 241.9 A | 76.8 C | 137.9 A |
DFAA | 13.0 (4.3) D | 139.6 (46.2) B | 46.4 (15.4) A | 103.0 (34.1) C | 0.0447 C | 31.0 A | 166.7 C | 79.0 B | 96.8 C |
Drought alone | 14.8 (4.9) C | 111.2 (37.2) D | 42.4 (14.2) B | 130.4 (43.7) B | 0.0520 B | 30.9 A | 186.9 B | 85.2 A | 124.4 B |
Flooding alone | 15.5 (4.9) B | 167.9 (53.4) A | 45.4 (14.5) A | 85.4 (27.2) D | 0.0514 B | 30.2 A | 156.6 D | 65.2 D | 78.8 D |
Treatment | Specific Absorption Rates | Use Efficiencies | Nutrient’s Ratios | ||||||
---|---|---|---|---|---|---|---|---|---|
mg Nutrient/g Root DW | g Grain/g Nutrient | mg/mg | |||||||
SAR-N | SAR-P | SAR-K | NUE | PUE | KUE | N:P | N:K | K:P | |
Control | 225.3 C | 28.4 C | 162.0 D | 33.5 A | 140.3 B | 46.5 A | 4.12 D | 1.39 B | 3.12 D |
DFAA | 334.4 A | 34.7 A | 220.1 A | 24.0 B | 121.4 c | 36.7 C | 5.13 A | 1.54 A | 3.36 B |
Drought alone | 266.7 C | 29.2 B | 211.6 B | 32.5 A | 162.7 A | 42.2 B | 5.04 B | 1.30 B | 3.98 A |
Flooding alone | 272.7 B | 24.9 D | 178.5 C | 19.5 C | 89.2 D | 29.4 D | 4.57 C | 1.55 A | 2.89 C |
Traits a | Grain Yield | Total N | Total P | Total K | SAR-N | SAR-P | SAR-K | NUE | PUE | KUE |
---|---|---|---|---|---|---|---|---|---|---|
Grain Yield | 1.000 | 0.268 | 0.397 | 0.423 * | 0.108 | 0.240 | 0.348 | 0.926 ** | 0.826 ** | 0.801 ** |
Stem DW | −0.856 ** | 0.056 | −0.154 | −0.352 | −0.046 | −0.138 | −0.300 | −0.860 ** | −0.792 ** | −0.847 ** |
Leaf DW | −0.623 ** | 0.226 | 0.351 | −0.226 | 0.200 | 0.345 | −0.024 | −0.617 ** | −0.822 ** | −0.622 ** |
Root DW | 0.058 | −0.130 | 0.031 | −0.087 | −0.894 ** | −0.704 ** | −0.720 ** | −0.156 | −0.234 | −0.222 |
RLD | −0.254 | 0.303 | 0.459 * | 0.307 | −0.700 ** | −0.734 ** | −0.620 ** | 0.378 * | 0.437 * | 0.232 |
SRL | −0.222 | 0.263 | 0.089 | 0.342 | 0.098 | 0.011 | 0.129 | 0.278 | 0.387 * | 0.277 |
RMD | −0.139 | −0.507 ** | −0.403 * | −0.453 * | −0.038 | −0.143 | −0.123 | −0.380 * | −0.542 ** | −0.383 * |
RSA | 0.180 | 0.203 | 0.232 | 0.110 | −0.676 ** | −0.702 ** | −0.592 ** | 0.287 | 0.251 | 0.305 |
Max. root depth | 0.771 ** | 0.391 * | 0.568 ** | 0.566 ** | −0.140 | 0.017 | 0.234 | 0.483 ** | 0.530 ** | 0.202 |
Adventitious roots | 0.048 | −0.325 | −0.022 | −0.055 | −0.075 | −0.260 | −0.085 | −0.158 | −0.253 | −0.277 |
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Huang, J.; Wu, F.; Hu, T.; Liu, L.; Wang, J.; Wang, X.; Liang, C.; Liu, J. Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice. Agronomy 2021, 11, 2103. https://doi.org/10.3390/agronomy11112103
Huang J, Wu F, Hu T, Liu L, Wang J, Wang X, Liang C, Liu J. Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice. Agronomy. 2021; 11(11):2103. https://doi.org/10.3390/agronomy11112103
Chicago/Turabian StyleHuang, Jie, Fengyan Wu, Tiesong Hu, Luguang Liu, Jing Wang, Xin Wang, Changmei Liang, and Jia Liu. 2021. "Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice" Agronomy 11, no. 11: 2103. https://doi.org/10.3390/agronomy11112103