scholarly journals MONITORING OF FOOTHILL AND MOUNTAIN PASTURE PLANTS OF KASHKADARYA BASIN

2020 ◽  
Vol 7 (13) ◽  
Keyword(s):  
Mountain Pasture ◽  
Pasture Plants

USE OF CELL AND MOLECULAR GENETIC MANIPULATION TO IMPROVE PASTURE PLANTS

1988 ◽  
pp. 67-72
Author(s):  
D.W.R. White
Keyword(s):  
Cell Culture ◽  
Perennial Ryegrass ◽  
White Clover ◽  
Nutritional Quality ◽  
Rust Resistance ◽  
Herbicide Tolerance ◽  
Pest Resistance ◽  
Crown Rust ◽  
Wide Range ◽  
Pasture Plants

Cell culture and genetic engineering techniques can be used to develop improved pasture plants. To utilise these methods we have developed procedures for regenerating plants from tissue cultures of perennial ryegrass and white clover. In both, the plant genotype influences regeneration capacity. There was significant genetic variation among regenerated perennial ryegrass plants in a wide range of characteristics. Most of the regenerants were resIstant to crown rust and this trait was highly heritable. This rust resistance is being used to breed a new ryegrass cultivar. A system for introducing cloned genes into white clover is described. This capability is bemg used to incorporate genes with the potential to improve nutritional quality and pest resistance. Other possibilities for engineering genetic improvements in white clover, genes conferring herbicide tolerance and resistance to white clover mosaic virus, are briefly outlined. Keywords: Lolium perenne, Trifolium repens, cell culture, somaclonal variation, crown rust resistance, transformation, cloned genes, nutritional quality, proteinase inhibitors, Bt toxins, pest resistance, WCMV viral cross-protection, herbicide tolerance, Agrobacterium, Bacillus thuringenisis.

FEATURES OF SALTS MIGRATION IN DELTAIC ECOSYSTEMS

1970 ◽  
pp. 28-29
Author(s):  
М. I. Dzhalalova ◽  
P. А. Abdurashidova ◽  
R. М. Zagidova
Keyword(s):  
Cover Crop ◽  
Groundwater Salinity ◽  
Salt Composition ◽  
Material Resource ◽  
Aboveground Phytomass ◽  
Soil Layers ◽  
Material Energy ◽  
Theoretical Foundations ◽  
Pasture Plants ◽  
Salinity Seawater

The coastal strip of the northwestern Caspian is characterized by hydromorphism and salinization processes which depending on the Caspian piled-up water, groundwater salinity, seawater, and salt composition of the underlying rocks. The migrational salts capability in deltoic ecosystem components in dynamic over the main representatives of pasture plants occurring in the Western Caspian and playing an important role in developing the theoretical foundations of a system of measures to increase the productivity of cover crop have studied. Salts migration from soil layers into plants which taking place in synthesis of material-energy and material resource of environment is one of the chains of bio-substrat links. The research results confirm the data that the ash elements stock in the ephemeral-absinthial group varies from 21.5 to 64.5 kg per 1 ha. The organogens prevail in them – 944 kg / ha, K is dominant, then Ca and Mg. The amount of halogens is 7.05 kg / ha, of which Cl portion includes 3.31 and Na – 2.80 kg / ha. In the ephemeral-absinthial group cenoses rather high values of aboveground phytomass are up to 50 centners / ha and the supply of ash elements (halogens 32.14 and organogens 36.18 mg-eq) is much higher compared to their content in soil (7.05 and 6, 31 mg-eq). In roots difference in quantity of organogens and halogens is insignificant – 2.03 and 2.04 mg-eq. We associate such differences with a greater proportion of absinthial in the aboveground phytomass composition

Effects of potassium and sodium application to soil on growth and cation accumulation of herbage

1984 ◽  
Vol 35 (1) ◽  
pp. 85 ◽  
Author(s):  
GN Mundy
Keyword(s):  
Plant Tissue ◽  
Field Experiments ◽  
Equivalent Amount ◽  
Growth Responses ◽  
K Uptake ◽  
Low Level ◽  
Pasture Plants

The effects of potassium (K) and sodium (Na) applications to soil on growth and cation accumulation of herbage were investigated in pot and field experiments. The application of K to K-deficient soil was more efficient at increasing growth than was the application of Na; however, at suboptimal K availability, yield was increased by Na application. Growth responses to Na were restricted when the soil contained insufficient K to satisfy the minimum K requirement of pasture plants. The Na concentration of herbage was markedly reduced by K applications, whereas Na had little effect on K uptake. It was found that an application of Na to soil containing a low level of Na raised the Na concentration of herbage sufficiently to satisfy animal needs. Both K and Na reduced the calcium (Ca) and magnesium (Mg) concentration of herbage, although Na was less inhibitive than an equivalent amount of K. The decline in Ca and Mg in plant tissue with increasing concentrations of soil K and Na was exponential and, as the decline approached the asymptotic concentration, further increases in soil K and Na had only a small effect on Ca and Mg uptake. The implications of these findings are discussed.

DANGEROUS METEOROLOGICAL EVENTS AFFECTING PASTURE PLANTS IN KARAKALPAKSTAN

2021 ◽  
pp. 476-480
Author(s):  
O.G. Sultashova ◽  
R.N. Jaksibaev ◽  
A.S. Aleuov
Keyword(s):  
Pasture Plants

THE EFFECT OF INTENSITY OF DEFOLIATION ON ROOT DEVELOPMENT AND PRODUCTION IN SOME PASTURE-GRASS SPECIES

1937 ◽  
pp. 140-146
Author(s):  
W.A. Jacques
Keyword(s):  
Root System ◽  
Root Development ◽  
Grass Species ◽  
Pasture Grass ◽  
Rest Periods ◽  
Pasture Plants

There are many points of approach to a consideration of root development in pasture plants, but I wish to confine myself to this effect on the root system of different rest periods between the removal of leaves and outline the plants reaction to them

The role of quality seed use for world crop production with special reference to the developing countries

1975 ◽  
Vol 8 (5) ◽  
pp. 268-270 ◽  
Author(s):  
W P Feistritzer
Keyword(s):  
Developing Countries ◽  
Special Reference ◽  
Crop Production ◽  
Stages Of Development ◽  
Short Article ◽  
Geographical Regions ◽  
The World ◽  
The Future ◽  
Pasture Plants

In this short article the author indicates the present stages of development of variety evaluation, testing, certification, production and marketing of quality seed—of cereals, industrial crops, pasture plants and vegetables—in major geographical regions of the world and draws attention to some of the underlying problems which must be faced in the future if further progress is to be made.

Grazing behaviour of Miranda donkeys in a natural mountain pasture and parasitic level changes

2016 ◽  
Vol 186 ◽  
pp. 16-21 ◽  
Author(s):  
M. Couto ◽  
A.S. Santos ◽  
J. Laborda ◽  
M. Nóvoa ◽  
L.M. Ferreira ◽  
...  
Keyword(s):  
Mountain Pasture ◽  
Grazing Behaviour
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