Role of magnesium in combination with liming in alleviating acid-soil stress with the aluminium-sensitive sorghum genotype CV323

1991 ◽  
Vol 136 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Kezheng Tan ◽  
Willem G. Keltjens ◽  
Günter R. Findenegg
Keyword(s):  
Acid Soil ◽  
Soil Stress

Nutrient problems in sown pasture on an acid soil. 2. Role of lime and superphosphate

1980 ◽  
Vol 20 (106) ◽  
pp. 568 ◽  
Author(s):  
KD McLachlan
Keyword(s):  
Plant Growth ◽  
Acid Soil ◽  
Phosphorus Uptake ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Titratable Acidity ◽  
Yield Response ◽  
P 16 ◽  
Exchangeable Magnesium

A study was made of the role of superphosphate and lime on subterranean clover (Trifolium subterraneum) production on an infertile acid soil in pot culture. Both fertilizers increased the exchangeable calcium in this deficient soil. Lime and superphosphate were involved in nodulation of the clover plants. There was no evidence of the direct involvement of either of them in the nitrogen fixation process, but they did increase nitrogen uptake by the plants. Once the legume functioned adequately, full expression of the yield response to phosphorus on this deficient soil followed. Most efficient phosphorus use occurred at the lime 1255, superphosphate 2000 kg ha-1 level (lime 1/2, P 16). Heavy lime dressing reduced exchangeable magnesium and the phosphorus available to the plant. Aluminium and pH were involved in the effects observed. Lime reduced CaCl2-extractable aluminium and the titratable acidity in the soil. Phosphate increased the CaCl2-extractable aluminium and apparently reduced the titratable aluminium. The combined treatments reduced these three attributes and promoted increased plant growth. Increased plant growth was associated with increased aluminium uptake by the plants, which suggests that the real effect of aluminium may have been on the calcium and phosphorus uptake by the plants, rather than on the toxic nature of the element itself.

Acid soil damage in sorghum genotypes: Role of magnesium deficiency and root impairment

1992 ◽  
Vol 139 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Kezheng Tan ◽  
Willem G. Keltjens ◽  
Günter R. Findenegg
Keyword(s):  
Magnesium Deficiency ◽  
Acid Soil ◽  
Sorghum Genotypes

Metal tolerance in Agrostis scabra from the Sudbury, Ontario, area

1995 ◽  
Vol 73 (5) ◽  
pp. 766-775 ◽  
Author(s):  
Daniel J. Archambault ◽  
Keith Winterhalder
Keyword(s):  
Root Growth ◽  
Contaminated Soils ◽  
Metal Tolerance ◽  
Leaf Growth ◽  
Acid Soil ◽  
Hydroponic Experiment ◽  
Ecological Aspects ◽  
Bioassay Experiment ◽  
Tolerance Indices

Acid, metal-contaminated soils are frequently colonized by plant species that have evolved tolerance to metals. Agrostis scabra (tickle grass) grows at several such sites in the Sudbury area. To test whether these populations were tolerant to metals, three experiments were performed. A hydroponic root growth experiment, in which clonal ramets from contaminated and uncontaminated sites were grown in metal-amended nutrient solutions, showed that plants from the Sudbury area had greater tolerance indices than those from outside Sudbury. A seed-based hydroponic experiment, where seeds were germinated in metal solutions, showed that metal-tolerance indices calculated from root growth were mostly greater for populations from Sudbury but that leaf growth was not a good indicator of metal tolerance. A seed-based soil-bioassay experiment, in which seeds were germinated on soils covered with filter paper, showed that seeds from contaminated sites performed better on contaminated soil and a 50:50 soil mixture (contaminated–uncontaminated) than those from uncontaminated sites. Populations of A. scabra growing on contaminated soils in the Sudbury area therefore appear to have been selected for metal tolerance. Ecological aspects of metal tolerance and the possible role of A. scabra in the revegetation of the Sudbury area are discussed. Key words: Agrostis scabra, tolerance, metals, acid soil, contamination.

scholarly journals Physiological Characteristics of Cultivated Tepary Bean (Phaseolus acutifolius A. Gray) and Its Wild Relatives Grown at High Temperature and Acid Soil Stress Conditions in the Amazon Region of Colombia

Plants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 116
Author(s):  
Juan Carlos Suárez ◽  
Amara Tatiana Contreras ◽  
José Alexander Anzola ◽  
José Iván Vanegas ◽  
Idupulapati M. Rao
Keyword(s):  
High Temperature ◽  
Genetic Resource ◽  
Acid Soil ◽  
Stress Conditions ◽  
Photochemical Quenching ◽  
Soil Conditions ◽  
Combined Stress ◽  
Tepary Bean ◽  
Phaseolus Acutifolius ◽  
Soil Stress

Common bean (Phaseolus vulgaris L.) is sensitive to different types of abiotic stresses (drought, high temperature, low soil fertility, and acid soil), and this may limit its adaptation and consequently to its yield under stress. Because of this, a sister species, tepary bean (Phaseolus acutifolius A. Gray), has recently gained attention in breeding for improved abiotic stress tolerance in common bean. In this study, we evaluated the adaptation of 302 accessions of tepary bean (Phaseolus acutifolius A. Gray) and its wild relatives (grouped in four types of tepary bean genetic resource: cultivated, acutifolius regressive, acutifolius wild, tenuifolius wild) when grown under high temperature and acid soil conditions with aluminum toxicity in the Amazon region of Colombia. Our objective was to determine differences among four types of tepary bean genetic resource in their morpho-phenological, agronomic, and physiological responses to combined high temperature and acid soil stress conditions. We found that cultivated P. acutifolius var acutifolius presented a greater number of pods per plant, as well as larger seeds and a greater number of seeds per pod. Some traits, such as root biomass, days to flowering and physiological maturity, specific leaf area, and stomatal density, showed significant differences between types of tepary bean genetic resource, probably contributing to difference in adaptation to combined stress conditions of high temperature and acid soil conditions. The photochemical quenching (qP) was higher in cultivated P. acutifolius var. acutifolius, while energy dissipation by non-photochemical quenching (NPQ) in the form of heat and the coefficient of non-photochemical dissipation (qN) were higher in acutifolius regressive and tenuifolius wild accessions. We have identified 6 accessions of cultivated and 19 accessions of tenuifolius wild that exhibited grain yields above 1800 kg ha−1. These accessions could be suitable to use as parents to improve dry seed production of tepary bean under combined stress conditions of high temperature and acid soil.

scholarly journals Effects of silver fir (Abies alba Mill.) on the humus forms in Norway spruce (Picea abies (L.) H. Karst.) stands

2018 ◽  
Vol 64 (No. 6) ◽  
pp. 245-250 ◽  
Author(s):  
Podrázský Vilém ◽  
Vacek Zdeněk ◽  
Kupka Ivo ◽  
Vacek Stanislav ◽  
Třeštík Michal ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Forest Floor ◽  
Acid Soil ◽  
Abies Alba ◽  
Silver Fir ◽  
Forest Site ◽  
Exchangeable Al ◽  
Top Soil

The effects of silver fir (Abies alba Miller) on the soil compared to Norway spruce (Picea abies (Linnaeus) H. Karsten) were evaluated. Altitude of the study site is 790 m a.s.l., mild slope of 10° facing SW, forest site is spruce-beech on acid soil. The forest floor and top soil horizons (L + F1, F2 + H, Ah) were sampled in 4 replications beneath unmixed Norway spruce and silver fir groups. Comparing the soil-forming effects of both species, few significant differences were found in the Ah horizon – contents of total C, N, exchangeable Al and plant available Ca were higher beneath spruce. The soil improving role of silver fir compared to spruce was confirmed at the studied locality.

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