Phytohormonal Responses to Soil Acidity in Plants

2016 ◽  
pp. 133-155
Author(s):  
Marjorie Reyes-Díaz ◽  
Elizabeth Maria Ulloa-Inostroza ◽  
Jorge González-Villagra ◽  
Alexander Gueorguiev Ivanov ◽  
Leonid Vladimir Kurepin
Keyword(s):  
Soil Acidity

ECOLOGY OF CYPRIPEDIUM CALCEOLUS L. (ORCHIDACEAE) IN KIROV REGION

2020 ◽  
Vol 6(72) (2) ◽  
pp. 234-248
Author(s):  
V. N. Suleimanova ◽  
N. Yu. Egorova
Keyword(s):  
Soil Moisture ◽  
Environmental Factors ◽  
Russian Federation ◽  
Soil Acidity ◽  
Southern Taiga ◽  
Soil Salt ◽  
Taiga Forest ◽  
Cypripedium Calceolus ◽  
The Russian Federation ◽  
Lathyrus Vernus

The object of our research was one of the most common orchids in the world – Cypripedium calceolus L. As a rare species, it is listed in the Red book of the Russian Federation (3 category of rarity) [8], the Kirov region (3 category of rarity) [9], as well as in the Red books of 59 regions of the Russian Federation [2]. Limiting factors in the Kirov region are the violation of habitats as a result of anthropogenic impacts – deforestation, recreation, collection for bouquets, digging, reducing the number of species. Studies on the study of C. calceolus in the Kirov region are isolated [10–12]. The purpose of this work is to identify phytocenotic parameters and environmental conditions of C. calceolus habitats within the southern taiga fragment of the range. Studies of ecological and cenotic conditions of C. calceolus habitats were conducted in southern taiga forest ecosystems within the Kirov region (Slobodskaya, Afanasyevsky districts) (See table 1) in the period from 2012 to 2019. The studied habitats of C. calceolus are confined to non-morally-boreal-small-grass and grass spruce forests (Melico nutantis-Piceetum abietis subass. typicum, Maianthemo-Piceetum subass. typicum var. typical) (See fig. 1), pine trees with fir and spruce of various grasses (Melico nutantis-Pinetum sylvestris var. Lathyrus vernus). The growth of C. calceolus on the technogenically disturbed substrate of an old spent limestone quarry overgrown with coniferous rocks and various grasses was also noted. All the studied biotopes are characterized by a large constancy of non-moral species with not significant coverage of mosses. The stand of spruce forest types is dominated by Picea abies, pine-Pinus sylvestris. Abies sibirica occurs as an impurity. The undergrowth layer has a diverse species composition: Sorbus aucuparia, Frangula alnus, Lonicera xylosteum, Yuniperus communis, Daphne mezereum. In this tier of most studied phytocenoses there is a Atragene sibirica. The grass-shrub layer is also very diverse, which determines the high specificity of these communities. In addition to species of boreal small grass (Maianthemum bifolium, Orthilia secunda, Luzula pilosa, Rubus saxatilis), the presence of non – morals is characteristic-Lathyrus vernus, Melica nutans, Stellaria holostea, Asarum europaeum. Moss-lichen layer is fragmentary (covering up to 45 %), Pleurozium schreberi and Hylocomium splendens act as sodominants. Phyto-indication of the studied C. calceolus habitats according to ten ecological scales of D. N. Tsyganov (See table 2, Fig. 2) showed that in relation to the complex of all environmental factors, the studied species is mesovalent (MV) (It total = 0.54) and has an average level of lability in relation to the studied environmental factors. In relation to the complex of all environmental factors, C. calceolus is a mesobiont species. On a scale of soil acidity, the species is semistarvation at termokhimicheskie and apolitically scale and dial illumination-shading – metavalent on the scale of the wealth of the soil nitrogen – hemimillennial at createmotions scale and the scale of continentality of the climate avivamento. Only on the scale of soil moisture and the scale of soil salt regime, C. calceolus is stenovalent, which indicates a very limited range of possible habitats for this factor. The species, in the studied habitats, realizes from 4.61 to 23.84 % of its potential according to the studied factors. For C. calceolus, the results obtained allow us to extend the scale of soil acidity by 0.75 degrees to the right. According to the other scales, the values of the ecological space of the studied CP are placed in the ranges given by D. N. Tsyganov for this type Edaphic conditions of C. calceolus on the scale of soil moisture correspond to regimes from dry-saline to wet-forest-saline; on the factor of soil salt regime-poor soils; soil acidity – acidic-slightly acidic soils; soil richness in nitrogen – nitrogen – poor soils; moisture variability-soils with relatively stable and poorly variable moisture.

The Relation of Soil Acidity to the Decomposition of Organic Residues 1

1933 ◽  
Vol 25 (6) ◽  
pp. 392-396 ◽  
Author(s):  
Charles Thom ◽  
N. R. Smith
Keyword(s):  
Soil Acidity ◽  
Organic Residues

Evolution of soil acidity during the past 36 years (1960-1996) under coniferous forest in a region of high livestock production in Flanders

1997 ◽  
Vol 62 ◽  
Author(s):  
A. De Schrijver ◽  
L. Nachtergale ◽  
L. De Temmerman ◽  
J. M.F. Frechilla ◽  
S. Mussche ◽  
...  
Keyword(s):  
Soil Acidity ◽  
Coniferous Forest ◽  
Livestock Production ◽  
The Past

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EFFECTS OF SOIL ACIDITY ON RHIZOBIA NUMBERS, NODULATION AND NITROGEN FIXATION BY ALFALFA AND RED CLOVER

1977 ◽  
Vol 57 (2) ◽  
pp. 197-203 ◽  
Author(s):  
W. A. RICE ◽  
D. C. PENNEY ◽  
M. NYBORG
Keyword(s):  
Nitrogen Fixation ◽  
Soil Ph ◽  
Soil Acidity ◽  
Field Experiments ◽  
Rhizobium Meliloti ◽  
Acid Soils ◽  
Red Clover ◽  
Ion Concentration ◽  
Hydrogen Ion Concentration ◽  
Greenhouse Experiments

The effects of soil acidity on nitrogen fixation by alfalfa (Medicago sativa L.) and red clover (Trifolium pratense L.) were investigated in field experiments at 28 locations, and in greenhouse experiments using soils from these locations. The pH of the soils (limed and unlimed) varied from 4.5 to 7.2. Rhizobia populations in the soil, nodulation, and relative forage yields (yield without N/yield with N) were measured in both the field and greenhouse experiments. Rhizobium meliloti numbers, nodulation scores, and relative yields of alfalfa decreased sharply as the pH of the soils decreased below 6.0. For soils with pH 6.0 or greater, there was very little effect of pH on any of the above factors for alfalfa. Soil pH in the range studied had no effect on nodulation scores and relative yields of red clover. However, R. trifolii numbers were reduced when the pH of the soil was less than 4.9. These results demonstrate that hydrogen ion concentration is an important factor limiting alfalfa growth on acid soils of Alberta and northeastern British Columbia, but it is less important for red clover. This supports the continued use of measurements of soil pH, as well as plant-available Al and Mn for predicting crop response to lime.

Soil Acidity and Liming Effects on Stand, Nodulation, and Yield of Common Bean

1990 ◽  
Vol 82 (4) ◽  
pp. 749-754 ◽  
Author(s):  
A. Buerkert ◽  
K. G. Cassman ◽  
R. Piedra ◽  
D. N. Munns
Keyword(s):  
Common Bean ◽  
Soil Acidity

Soil acidity and aluminum speciation affected by liming in the conversion of a natural pasture from the Brazilian Campos Biome into no-tillage system for grain production

2019 ◽  
Vol 66 (2) ◽  
pp. 138-151 ◽  
Author(s):  
Alcione Miotto ◽  
Tales Tiecher ◽  
João Kaminski ◽  
Gustavo Brunetto ◽  
Lessandro De Conti ◽  
...  
Keyword(s):  
Soil Acidity ◽  
No Tillage ◽  
Grain Production ◽  
Aluminum Speciation ◽  
Natural Pasture ◽  
Tillage System

AN ASSESSMENT OF THE SOIL ACIDITY PROBLEM IN ALBERTA AND NORTHEASTERN BRITISH COLUMBIA

1977 ◽  
Vol 57 (2) ◽  
pp. 157-164 ◽  
Author(s):  
D. C. PENNEY ◽  
M. NYBORG ◽  
P. B. HOYT ◽  
W. A. RICE ◽  
B. SIEMENS ◽  
...  
Keyword(s):  
British Columbia ◽  
Soil Ph ◽  
Soil Acidity ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Acid Soils ◽  
Red Clover ◽  
Hordeum Vulgare L ◽  
Crop Species

The amount of cultivated acid soil in Alberta and northeastern British Columbia was estimated from pH values of farm samples analyzed by the Alberta Soil Testing Laboratory, and the effect of soil acidity on crops was assessed from field experiments on 28 typical acid soils. The field experiments consisted of two cultivars of barley (Hordeum vulgare L.) and one cultivar each of rapeseed (Brassica campestris L.), red clover (Trifolium pratense L.) and alfalfa (Medicago sativa L.) grown with and without lime for 2 yr. There are about 30,000 ha of soils with a pH of 5.0 or less where soil acidity seriously restricts yields of all four crop species. There are approximately 300,000 ha with a soil pH of 5.1–5.5 where liming will on the average increase yields of alfalfa by 100%, yields of barley by 10–15%, and yields of rapeseed and red clover by 5–10%. There are a further 1,600,000 ha where soil pH ranges from 5.6 to 6.0 and liming will increase yields of alfalfa by approximately 50% and yields of barley, rapeseed and red clover by at least 4–5%.

Soil acidity in 1970 and 1989 in a coniferous forest in southwest Finland

1998 ◽  
Vol 78 (3) ◽  
pp. 477-479 ◽  
Author(s):  
C. J. Westman ◽  
S. Jauhiainen
Keyword(s):  
Key Words ◽  
Soil Ph ◽  
Soil Acidity ◽  
Mineral Soil ◽  
Coniferous Forest ◽  
Soil Layers ◽  
Water Suspension ◽  
Ph Values ◽  
Humus Layer ◽  
Repeated Sampling

Forest soil pH in southwest Finland was measured with identical sampling and analysing methods in 1970 and 1989. The acidity of the organic humus layer increased significantly as pH values measured on water and on salt suspensions decreased between the two sampling dates. For the mineral soil layers, no unambiguous trend was found. pH values measured on salt suspension tended to be unchanged or lower, while pH on water suspension in some soil layers were even higher in 1989 than in 1970. Key words: pH, repeated sampling

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