Role of Organic Anions and Phosphatase Enzymes in Phosphorus Acquisition in the Rhizospheres of Legumes and Grasses Grown in a Low Phosphorus Pasture Soil
Abstract
:1. Introduction
2. Results
2.1. Plant Biomass and Plant P Contents
2.2. Rhizosphere pH
2.3. Microbial Biomass P
2.4. Phosphatase Activity
2.5. Organic Anions
2.6. Rhizosphere P Fractions
3. Discussion
3.1. Plant Responses to Nutrient Addition
3.2. Rhizosphere pH
3.3. Microbial Biomass P
3.4. Phosphatases Activity
3.5. Organic Anions
3.6. Rhizosphere P Fractions and P Acquisition
4. Materials and Methods
4.1. Soil Preparation and Characteristics
4.2. Experimental Design
4.3. Plant and Soil Analyses
4.4. Data Analysis
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Root Biomass | Shoot Biomass | Root P | Shoot P | Plant P Content | |
---|---|---|---|---|---|
Blue Lupin | |||||
Control | 1.2 ± 0.1 b 1 | 2.2 ± 0.1 b | 1.0 ± 0.0 b | 1.1 ± 0.0 c | 3.54 ± 0.25 c |
P | 1.7 ± 0.2 a | 2.4 ± 0.1 a | 1.1 ± 0.1 a | 1.3 ± 0.1 b | 4.84 ± 0.69 a |
N | 1.4 ± 0.3 b | 2.1 ± 0.1 b | 0.9 ± 0.0 c | 1.0 ± 0.1 d | 3.26 ± 0.49 c |
NP | 1.5 ± 0.2 a | 2.6 ± 0.2 a | 1.0 ± 0.1 b | 1.4 ± 0.1 a | 4.67 ± 0.70 b |
Wheat | |||||
Control | 0.9 ± 0.0 c | 1.1 ± 0.0 c | 0.8 ± 0.1 b | 0.4 ± 0.0 c | 1.25 ± 0.08 c |
P | 1.9 ± 0.1 b | 1.4 ± 0.0 b | 1.1 ± 0.0 a | 0.8 ± 0.0 a | 3.21 ± 0.09 a |
N | 0.9 ± 0.1 c | 1.1 ± 0.1 c | 0.8 ± 0.1 b | 0.4 ± 0.0 c | 1.28 ± 0.13 c |
NP | 2.2 ± 0.2 a | 2.0 ± 0.2 a | 0.9 ± 0.1 b | 0.6 ± 0.0 b | 3.08 ± 0.24 b |
Ryegrass | |||||
Control | 0.4 ± 0.0 c | 0.2 ± 0.0 c | 1.2 ± 0.0 b | 0.7 ± 0.0 b | 0.58 ± 0.04 c |
P | 1.0 ± 0.1 b | 0.8 ± 0.1 b | 1.3 ± 0.0 a | 1.1 ± 0.0 a | 1.65 ± 0.13 b |
N | 0.4 ± 0.2 c | 0.3 ± 0.1 c | 1.2 ± 0.1 b | 0.7 ± 0.0 b | 0.73 ± 0.27 c |
NP | 1.9 ± 0.2 a | 1.1 ± 0.0 a | 1.0 ± 0.1 c | 0.6 ± 0.0 c | 2.52 ± 0.25 a |
White clover | |||||
Control | 0.2 ± 0.0 1 c | 0.2 ± 0.0 b | 1.6 ± 0.1 a | 0.7 ± 0.0 b | 0.38 ± 0.03 b |
P | 1.0 ± 0.1 b | 0.7 ± 0.1 a | 1.5 ± 0.0 b | 0.9 ± 0.0 a | 2.03 ± 0.17 a |
N | 0.3 ± 0.0 c | 0.2 ± 0.0 b | 1.5 ± 0.0 b | 0.7 ± 0.0 b | 0.46 ± 0.08 b |
NP | 1.5 ± 0.1 a | 0.9 ± 0.0 a | 1.3 ± 0.0 c | 0.8 ± 0.1 a | 2.38 ± 0.39 a |
Soil pH | Total C | Total N | Total P | Olsen P | Exchangeable Potassium | Exchangeable Al | Soil Texture (%) | ||
---|---|---|---|---|---|---|---|---|---|
g C kg−1 soil | g N kg−1 soil | mg P kg−1 soil | mg P kg−1 soil | me/100 g soil | mg kg−1 soil | Sand | Silt | Clay | |
5.4 | 44 | 3.9 | 1236 | 4 | 0.16 | 7.2 | 12.6 | 37.8 | 49.6 |
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Touhami, D.; McDowell, R.W.; Condron, L.M. Role of Organic Anions and Phosphatase Enzymes in Phosphorus Acquisition in the Rhizospheres of Legumes and Grasses Grown in a Low Phosphorus Pasture Soil. Plants 2020, 9, 1185. https://doi.org/10.3390/plants9091185
Touhami D, McDowell RW, Condron LM. Role of Organic Anions and Phosphatase Enzymes in Phosphorus Acquisition in the Rhizospheres of Legumes and Grasses Grown in a Low Phosphorus Pasture Soil. Plants. 2020; 9(9):1185. https://doi.org/10.3390/plants9091185
Chicago/Turabian StyleTouhami, Driss, Richard W. McDowell, and Leo M. Condron. 2020. "Role of Organic Anions and Phosphatase Enzymes in Phosphorus Acquisition in the Rhizospheres of Legumes and Grasses Grown in a Low Phosphorus Pasture Soil" Plants 9, no. 9: 1185. https://doi.org/10.3390/plants9091185