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| Researcher(s) |
Richard Lowrie Mark Norton Andrew Price Peter Tyndall |
|---|---|
| Year(s) | 2017 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Wagga Wagga, ACT
|
| Further information | View external link |
1. To ascertain the presence of any pH threshold below which the tolerance of the species declined
2. To study the response of several faba bean cvv to a range of pH to determine whether there were any genetic differences in tolerance to low pH.
• The critical pHCa threshold is in the range of 5.2 to 5.4, below which faba bean growth is reduced.
• Variability for tolerance to low pH is present within the species with cultivar (cv) PBA ZahraA more tolerant at low pH than cultivars (cvv) PBA SamiraA, FarahA or PBA NasmaA.
• The sensitivity of uninoculated faba bean plants to low pH suggests it may not be sufficient to overcome the poor performance of faba bean on acid soils simply by developing more acid-tolerant rhizobium. Further research is warranted to address this question.
A solution culture experiment was conducted in a temperature controlled growth chamber for 14 days. The temperature was set at 23 °C and light was artificially provided above the plants at an average photosynthetic photon flux density of 340 ± 70 µmol/m2 per second on a 14/10 hour day/night cycle. The concentration of nutrients in the basal nutrient solution in micro moles (µM) was: 500 calcium (Ca); 2000 nitrogen (N) (300 NH4, 1700 NO3); 500 potassium (K); 201 sulphate (SO4); 200 magnesium (Mg); 50 phosphate (PO4); 23 boron (B); 10 iron (Fe); 9 Mn; 0.8 zinc (Zn); 0.3 copper (Cu); and 0.1 molybdenum (Mo).
The test solutions’ pH were set at 4.5, 4.8, 5.1, 5.4 and 5.7 over the course of the experiment and adjusted daily using 1 M hydrochloric acid (HCl) or 1 M sodium hydroxide (NaOH).
| Lead research organisation |
Department of Primary Industries NSW |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAN00191 |
| Trial funding source | DPI NSW |
| Related program | N/A |
| Acknowledgments |
This experiment was part of the GRDC project ‘N fixing break crops and pastures on high rainfall zone acid soils’, DAN00191, July 2014–June 2018. We are grateful to Helen Burns for her advice and encouragement and wish to acknowledge our collaborators, CSIRO Agriculture and Food, Mackillop Farm Management Group, Holbrook Landcare Network and Roberts Ltd. |
| Other trial partners | Not specified |
| Crop type | Grain Legume: Faba beans |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | Not applicable |
|---|---|
| Harvest date | Not applicable |
| Plot size | Not specified |
| Plot replication | Not specified |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2018, available at |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
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Note that PBR cover is administered through the Plant Breeders’ Right Act 1994 (