Effect of Digestate and Straw Combined Application on Maintaining Rice Production and Paddy Environment
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experiment Treatments
2.2. Sampling and Analytical Procedures
2.3. Statistical Analysis
3. Results
3.1. Rice Yield and Plant N Distribution under Different Treatments
3.1.1. Rice Yield and Yield Components
3.1.2. Plant N Distribution
3.2. The Degree of Straw Decomposition
3.3. Soil Enzymatic Activities
3.4. Nutrients in Soil and Surface Water
3.4.1. Soil Organic Matter and Nutrient Contents
3.4.2. TN, NO3−-N and NH4+-N Contents in Soil Surface Water
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Treatments | Basal Fertilizer | Tillering Fertilizer | Jointing Fertilizer | Panicle Fertilizer | Straw Incorporation Rate (t hm−2) | ||
---|---|---|---|---|---|---|---|
Digestate (t hm−2) | Compound Fertilizer (kg hm−2) | Urea (kg hm−2) | Urea (kg hm−2) | Digestate (t hm−2) | Urea (kg hm−2) | ||
Control | \ | \ | \ | \ | \ | \ | \ |
D | 120 | \ | \ | \ | 90 | \ | \ |
DF | 120 | \ | 211.5 | \ | 90 | \ | \ |
DS | 120 | \ | \ | \ | 90 | \ | 7.5 |
DFS | 120 | \ | 211.5 | \ | 90 | \ | 7.5 |
CS | \ | 525 | 211.5 | 130.5 | \ | 64.5 | 7.5 |
Treatments | Ear Number (104 hm−2) | Grains per Spike | Seed Setting Rate (%) | 1000-Grain Weight (g) | Theoretical Yield (t hm−2) |
---|---|---|---|---|---|
Control | 273.38 ± 13.32 c | 115.49 ± 12.12 b | 79.64 ± 0.10 a | 28.06 ± 1.08 a | 7.06 ± 0.06 d |
D | 293.06 ± 19.98 c | 147.82 ± 12.37 a | 75.48 ± 0.05 b | 26.86 ± 0.34 c | 8.78 ± 0.67 c |
DF | 346.32 ± 23.64 b | 126.79 ± 3.65 b | 82.20 ± 0.07 a | 27.30 ± 0.55 b | 9.86 ± 0.60 a |
DS | 339.66 ± 19.98 b | 131.71 ± 1.24 ab | 71.19 ± 0.02 c | 27.39 ± 0.28 b | 8.72 ± 0.97 c |
DFS | 373.35 ± 6.66 a | 122.62 ± 7.95 b | 76.68 ± 0.02 b | 27.83 ± 0.03 a | 9.77 ± 1.18 a |
CS | 368.32 ± 26.63 a | 120.72 ± 17.14 c | 77.17 ± 0.07 b | 27.79 ± 0.01 b | 9.53 ± 1.60 ab |
Enzymes | Treatments | Tillering | Jointing | Heading | Maturity |
---|---|---|---|---|---|
Catalase (Ug−1) | Control | 28.08 ± 1.06 b | 45.06 ± 1.33 c | 34.34 ±1.35 c | 33.09 ± 1.88 c |
D | 28.37 ± 1.12 b | 47.36 ± 0.84 b | 35.59 ± 0.35 b | 34.74 ± 1.55 b | |
DF | 29.12 ± 2.01 b | 52.99 ± 2.19 a | 36.80 ± 1.65 ab | 36.87 ± 0.60 a | |
DS | 30.77 ± 1.16 a | 51.49 ± 1.40 a | 38.33 ± 1.80 a | 37.62 ± 0.93 a | |
DFS | 32.19 ± 0.38 a | 51.21 ± 1.85 a | 37.49 ± 1.29 a | 36.60 ± 1.14 a | |
CS | 27.58 ± 1.64 c | 40.49 ± 1.73 d | 31.48 ± 0.52 c | 32.92 ± 0.90 c | |
Alkaline phosphatase (Ug−1) | Control | 9.67 ± 0.81 c | 14.70 ± 0.84 b | 12.10 ± 0.03 bc | 7.81 ± 0.31 b |
D | 12.99 ± 0.36 a | 16.92 ± 0.61 a | 12.28 ± 0.41 b | 8.53 ± 0.36 b | |
DF | 14.05 ± 0.21 a | 18.24 ± 0.71 a | 15.91 ± 0.63 a | 8.03 ± 0.21 b | |
DS | 11.77 ± 0.11 ab | 14.80 ± 0.51 ab | 13.59 ± 0.11 ab | 10.44 ± 0.35 a | |
DFS | 12.08 ± 0.24 ab | 15.91 ± 0.61 a | 14.50 ± 0.21 a | 10.72 ± 0.23 a | |
CS | 10.47 ± 0.83 b | 15.51 ± 0.20 ab | 15.20 ± 0.71 a | 9.66 ± 0.56 a | |
Urease (Ug−1) | Control | 1.63 ± 0.14 b | 1.02 ± 0.04 c | 1.18 ± 0.02 ab | 2.15 ± 0.38 cd |
D | 1.73 ± 0.06 b | 1.05 ± 0.03 b | 1.25 ± 0.05 a | 2.69 ± 0.22 b | |
DF | 1.70 ± 0.08 b | 1.06 ± 0.02 b | 1.22 ± 0.06 a | 2.56 ± 0.12 b | |
DS | 1.92 ± 0.01 a | 1.16 ± 0.08 a | 1.19 ± 0.04 ab | 3.38 ± 0.10 a | |
DFS | 1.80 ± 0.07 a | 1.16 ± 0.01 a | 1.21 ± 0.01 a | 2.52 ± 0.16 b | |
CS | 1.73 ± 0.11 ab | 1.17 ± 0.03 a | 1.19 ± 0.06 ab | 2.27 ± 0.17 c | |
Sucrase (Ug−1) | Control | 3.43 ± 0.05 b | 3.11 ± 0.39 c | 2.50 ± 0.08 b | 3.21 ± 0.28 bc |
D | 3.67 ± 0.20 a | 3.76 ± 0.33 a | 2.64 ± 0.07 a | 3.86 ± 0.29 a | |
DF | 3.73 ± 0.29 a | 3.62 ± 0.14 ab | 2.79 ± 0.06 a | 3.61 ± 0.01 ab | |
DS | 3.64 ± 0.01 a | 3.82 ± 0.04 a | 2.85 ± 0.01 a | 3.88 ± 0.18 a | |
DFS | 3.65 ± 0.05 a | 3.71 ± 0.10 a | 2.76 ± 0.07 a | 3.67 ± 0.26 ab | |
CS | 3.81 ± 0.10 a | 3.45 ± 0.01 b | 2.31 ± 0.13 b | 3.35 ± 0.18 b |
Treatments | SOM (g mg−1) | TN (g mg−1) | AN (mg kg−1) | AP (mg kg−1) | AK (mg kg−1) |
---|---|---|---|---|---|
CK | 19.54 ± 0.65 c | 1.68 ± 0.03 c | 123.90 ± 5.40 c | 19.38 ± 0.22 d | 187.50 ± 9.85 c |
D | 21.71 ± 0.73 b | 1.72 ± 0.23 c | 135.82 ± 5.61 b | 26.04 ± 1.02 b | 231.37 ± 5.98 b |
DF | 22.07 ± 1.26 b | 1.83 ± 0.06 b | 128.48 ± 2.42 c | 26.22 ± 0.51 b | 245.33 ± 7.88 a |
DS | 24.30 ± 1.39 a | 1.86 ± 0.11 b | 159.89 ± 2.39 a | 31.48 ± 0.32 a | 247.32 ± 9.97 a |
DFS | 25.49 ± 1.13 a | 2.05 ± 0.03 a | 140.09 ± 6.20 b | 26.78 ± 0.55 b | 227.38 ± 5.98 b |
CS | 20.71 ± 1.65 b | 1.88 ± 0.08 b | 138.94 ± 5.24 b | 22.53 ± 0.25 c | 223.39 ± 8.96 b |
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Hu, X.; Liu, H.; Xu, C.; Huang, X.; Jiang, M.; Zhuang, H.; Huang, L. Effect of Digestate and Straw Combined Application on Maintaining Rice Production and Paddy Environment. Int. J. Environ. Res. Public Health 2021, 18, 5714. https://doi.org/10.3390/ijerph18115714
Hu X, Liu H, Xu C, Huang X, Jiang M, Zhuang H, Huang L. Effect of Digestate and Straw Combined Application on Maintaining Rice Production and Paddy Environment. International Journal of Environmental Research and Public Health. 2021; 18(11):5714. https://doi.org/10.3390/ijerph18115714
Chicago/Turabian StyleHu, Xue, Hongyi Liu, Chengyu Xu, Xiaomin Huang, Min Jiang, Hengyang Zhuang, and Lifen Huang. 2021. "Effect of Digestate and Straw Combined Application on Maintaining Rice Production and Paddy Environment" International Journal of Environmental Research and Public Health 18, no. 11: 5714. https://doi.org/10.3390/ijerph18115714
APA StyleHu, X., Liu, H., Xu, C., Huang, X., Jiang, M., Zhuang, H., & Huang, L. (2021). Effect of Digestate and Straw Combined Application on Maintaining Rice Production and Paddy Environment. International Journal of Environmental Research and Public Health, 18(11), 5714. https://doi.org/10.3390/ijerph18115714