Differences in Biomass Production and Water Use Efficiency among Seven Different Cover Crops in the Wet Winter Seasons of 2016/17 and 2018 in South Carolina
Abstract
:1. Introduction
2. Materials and Methods
Statistical Analysis
3. Results
3.1. Environmental Conditions
3.2. Cover Crop Growth and Biomass Production
3.3. Volumetric Soil Water Content
3.4. Cover Crop Water Use Efficiency
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Soil Parameter/Nutrients | Season-1 | Season-2 |
---|---|---|
Soil pH | 6.4 | 6.6 |
Phosphorus (kg ha−1) | 36 (Medium) | 16 (Low) |
Potassium (kg ha−1) | 152 (Sufficient) | 131 (Sufficient) |
Calcium (kg ha−1) | 1500 (Sufficient) | 1291 (Sufficient) |
Magnesium (kg ha−1) | 312 (Sufficient) | 294 (Sufficient) |
Zinc (kg ha−1) | 4.5 (Sufficient) | 3.6 (Sufficient) |
Manganese (kg ha−1) | 75 (Sufficient) | 70 (Sufficient) |
Boron (kg ha−1) | 0.5 (Sufficient) | 0.6 (Sufficient) |
Copper (kg ha−1) | 0.89 | 0.83 |
Sodium (kg ha−1) | 10 | 12 |
Nitrate nitrogen (ppm) | 12 | 1 |
Organic matter (%) | 3.7 | 4.1 |
Treatment | Crop | Species | Seeding Rate (kg ha−1) | Fractional Composition 1 (%) | Functional Group |
---|---|---|---|---|---|
Single species | |||||
Single species-a2 | Cereal rye | Secale cereale L. cv. Wrens Abruzzi | 112.1 | 100 | Grass |
Single species-b3 | Crimson clover | Trifolium incarnatum L. cv. Dixie | 33.6 | 100 | Legume |
Mixture of two species | |||||
Mixture of two-a | Rye | Secale cereale L. cv. Wrens Abruzzi | 56 | 77 | Grass |
Crimson clover | Trifolium incarnatum L. cv. Dixie | 16.8 | 23 | Legume | |
Mixture of two-b | Crimson clover | Trifolium incarnatum L. cv. Dixie | 16.8 | 75 | Legume |
Turnip | Brassica rapa subsp. rapa. cv. Purple top white globe | 5.6 | 25 | Brassica | |
Mixture of two-c4 | Oat | Avena sativa L. cv. Coker 227 | 56 | 83 | Grass |
Radish (Daikon) | Raphanus sativus var. Longipinnatus | 11.2 | 17 | Brassica | |
Mixture of five species | |||||
Mixture of five-a | Austrian winter pea | Pisum sativum L. ssp. sativum var. arvense | 26.9 | 31 | Legume |
Rye | Secale cereale L. cv. Wrens Abruzzi | 22.4 | 25 | Grass | |
Crimson clover | Trifolium incarnatum L. cv. Dixie | 6.7 | 8 | Legume | |
Hairy vetch | Vicia villosa Roth cv. Namoi | 8.9 | 10 | Legume | |
Oat | Avena sativa L. cv. Coker 227 | 22.4 | 26 | Grass | |
Mixture of five-b | Oat | Avena sativa L. cv. Coker 227 | 22.4 | 38 | Grass |
Wheat | Triticum aestivum L. cv. Georgia. gore | 22.4 | 38 | Grass | |
Crimson clover | Trifolium incarnatum L. cv. Dixie | 6.7 | 12 | Legume | |
Radish (Daikon) | Raphanus sativus var. Longipinnatus | 4.5 | 8 | Brassica | |
Turnip | Brassica rapa subsp. rapa. cv. Purple top white globe | 2.24 | 4 | Brassica |
DAP 1 | p Values | |||
---|---|---|---|---|
Treatment 2 | Depth 3 | Treatment x Depth | ||
Season-1 (2016–2017) | ||||
Biomass | 83 | <0.0001 | N/A 4 | N/A |
111 | <0.0001 | N/A | N/A | |
137 | <0.0001 | N/A | N/A | |
162 | <0.0001 | N/A | N/A | |
Volumetric soil water content | 74 | 0.0013 | <0.0001 | 0.6162 |
83 | 0.0044 | <0.0001 | 0.6526 | |
97 | 0.0051 | <0.0001 | 0.6406 | |
111 | 0.1856 | <0.0001 | 0.7253 | |
130 | 0.0317 | <0.0001 | 0.6440 | |
137 | 0.6676 | <0.0001 | 0.6378 | |
162 | 0.1560 | <0.0001 | 0.8909 | |
267 | <0.0001 | <0.0001 | 0.8598 | |
Total stored soil water in 60 cm depth | 74 | 0.1015 | N/A | N/A |
83 | 0.1944 | N/A | N/A | |
97 | 0.1690 | N/A | N/A | |
111 | 0.6628 | N/A | N/A | |
130 | 0.3652 | N/A | N/A | |
137 | 0.9102 | N/A | N/A | |
162 | 0.6095 | N/A | N/A | |
267 | 0.0885 | N/A | N/A | |
Water use efficiency | 111 | 0.0093 | N/A | N/A |
137 | <0.0001 | N/A | N/A | |
162 | 0.0079 | N/A | N/A | |
Season-2 (2018) | ||||
Biomass | 62 | <0.0001 | N/A | N/A |
96 | 0.0018 | N/A | N/A | |
104 | <0.0001 | N/A | N/A | |
Volumetric soil water content | 38 | 0.0310 | <0.0001 | 0.9532 |
61 | 0.0947 | <0.0001 | 0.9869 | |
75 | 0.0935 | <0.0001 | 0.9973 | |
95 | 0.0741 | <0.0001 | 0.9904 | |
104 | 0.1348 | <0.0001 | 0.9895 | |
166 | 0.1452 | <0.0001 | 0.9885 | |
Total stored soil water in 60 cm depth | 39 | 0.3922 | N/A | N/A |
63 | 0.5363 | N/A | N/A | |
76 | 0.5260 | N/A | N/A | |
96 | 0.4801 | N/A | N/A | |
105 | 0.6491 | N/A | N/A | |
167 | 0.6122 | N/A | N/A | |
Water use efficiency | 95 | 0.1197 | N/A | N/A |
104 | 0.0004 | N/A | N/A |
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St Aime, R.; Zehnder, G.W.; Talley, C.; Narayanan, S. Differences in Biomass Production and Water Use Efficiency among Seven Different Cover Crops in the Wet Winter Seasons of 2016/17 and 2018 in South Carolina. Agronomy 2020, 10, 463. https://doi.org/10.3390/agronomy10040463
St Aime R, Zehnder GW, Talley C, Narayanan S. Differences in Biomass Production and Water Use Efficiency among Seven Different Cover Crops in the Wet Winter Seasons of 2016/17 and 2018 in South Carolina. Agronomy. 2020; 10(4):463. https://doi.org/10.3390/agronomy10040463
Chicago/Turabian StyleSt Aime, Ricardo, Geoffrey W. Zehnder, Christopher Talley, and Sruthi Narayanan. 2020. "Differences in Biomass Production and Water Use Efficiency among Seven Different Cover Crops in the Wet Winter Seasons of 2016/17 and 2018 in South Carolina" Agronomy 10, no. 4: 463. https://doi.org/10.3390/agronomy10040463
APA StyleSt Aime, R., Zehnder, G. W., Talley, C., & Narayanan, S. (2020). Differences in Biomass Production and Water Use Efficiency among Seven Different Cover Crops in the Wet Winter Seasons of 2016/17 and 2018 in South Carolina. Agronomy, 10(4), 463. https://doi.org/10.3390/agronomy10040463