DETERMINATION OF HAZELNUT HUSK DECOMPOSITION LEVEL AND OF THE CONTENT OF SOME PLANT NUTRIENT ELEMENTS UNDER NATURAL CONDITIONS

2009 ◽  
pp. 323-330 ◽  
Author(s):  
D. Bender Özenç ◽  
N. Özenç
Keyword(s):  
Nutrient Elements ◽  
Plant Nutrient ◽  
Decomposition Level ◽  
Natural Conditions ◽  
Hazelnut Husk

scholarly journals Increase of nutrients export and production of pitaya whit potassium fertilization

2020 ◽  
Vol 11 ◽  
pp. e3276
Author(s):  
Josimara Mendes Rabelo ◽  
Maria do Céu Monteiro Cruz ◽  
Nubia Cassiana Santos ◽  
Deilson de Almeida Alves ◽  
João Esdras Lima ◽  
...  
Keyword(s):  
Dry Matter ◽  
Nutritional Requirements ◽  
Nutrient Export ◽  
Plant Nutrient ◽  
High Productivity ◽  
Potassium Fertilization ◽  
Hylocereus Undatus ◽  
Hylocereus Polyrhizus

Characterization works of pitayas show that the potassium (K) is the nutrient most exported, thus, influences in the productivity and quality of this fruit. However, these researches do not report the nutrients export by pitaya's associating the fertilization carried out in the orchard, information that is relevant to make the nutrients reposition adequate at the time of fertilization. The research was carried out to evaluate the supply of K2O in the export of nutrients and productivity of the Hylocereus undatus and Hylocereus polyrhizus pitaya species. The analysis was carried out in the mature fruits harvested in two harvests. Potassium fertilization was performed at doses of 0; 50; 100 and 200 g of K2O per plant. Nutrient export per ton of fruit was calculated from the determination of the nutrient levels and the dry matter of the pitaya pulp. The export of nutrients by the pitaya of the species H. undatus and H. polyrhizus occurs in the following order: K>N>P>Ca>Mg> and Mn>Fe>Cu>Zn>B. These species of pitaya have similar nutritional requirements, enabling them to be receive same fertilization management. The amount of nutrients exported was higher in plants fertilized with potassium due to the higher productivity achieved. Orchards of pitaya that reach high productivity require a greater quantity of nutrients, due to the increase export by the fruits.

Some Inorganic Compounds as Sprays: Their Effects on Insect Biology on Arachis hypogaea L.1,2

1977 ◽  
Vol 4 (1) ◽  
pp. 7-8
Author(s):  
D. B. Leuck ◽  
R. O. Hammons
Keyword(s):  
Arachis Hypogaea ◽  
Spodoptera Frugiperda ◽  
Inorganic Compounds ◽  
Fall Armyworm ◽  
Nutrient Elements ◽  
Plant Nutrient ◽  
Arachis Hypogaea L ◽  
Insect Biology

Abstract Inorganic compounds containing plant nutrient elements sprayed on peanut, Arachis hypogaea L., foliage affected antibiosis expressions of the plant to feeding by the fall armyworm, Spodoptera frugiperda (J. E. Smith).

The reproductive habits and sex-determination of the nematode Rhabditis pellio Bütschli, with a note on its taxonomy and nomenclature

Parasitology ◽  
1953 ◽  
Vol 43 (1-2) ◽  
pp. 94-101 ◽  
Author(s):  
D. A. T. New
Keyword(s):  
Sex Ratio ◽  
Sex Determination ◽  
Natural Conditions ◽  
Separate Species ◽  
Chromosomal Arrangement ◽  
Parthenogenetic Reproduction ◽  
Rhabditis Pellio

1. The nematode Rhabditis pellio Bütschli may be cultured indefinitely on earthworm extract.2. Although the females of this nematode are usually capable of parthenogenetic reproduction, males are produced in the offspring only if copulation has taken place.3. Occasionally non-parthenogenetic generations appear but these do not represent a separate species.4. An explanation is given for the sex ratio found under natural conditions and it is suggested that sex-determination works on a chromosomal arrangement of XO = male and XX = female.5. The nematode named R. terrestris Stephenson 1942 is probably the same as that named R. pellio Bütschli by Johnson 1913.6. The nomenclature of R. pellio Bütschli is discussed.

Forms and solubility of plant nutrient elements in tropical plant waste biochars

2015 ◽  
Vol 178 (5) ◽  
pp. 732-740 ◽  
Author(s):  
Nattaporn Prakongkep ◽  
Robert John Gilkes ◽  
Wanpen Wiriyakitnateekul
Keyword(s):  
Nutrient Elements ◽  
Plant Nutrient ◽  
Tropical Plant ◽  
Plant Waste

scholarly journals DETERMINATION OF THE STEROL STATE OF GENERATIVE PLANTS OF HEATH SPOTTED-ORCHID (DACTY-LORHIZA MACULATA (L.) SOÓ) (ORCHIDACEAE) BY GC-MS

2020 ◽  
pp. 171-178
Author(s):  
Evgeniy Nikolayevich Sechin ◽  
Oleg Anatolyevich Marakaev ◽  
Gavriil Borisovich Gavrilov
Keyword(s):  
Growth And Development ◽  
Plant Material ◽  
Adventitious Roots ◽  
European Part ◽  
Natural Conditions ◽  
Central European ◽  
Mass Spectrometric Detector ◽  
European Part Of Russia ◽  
First Time

For the first time, the phytosterol state of the underground and aboveground organs of the tuberoid species of the orchid Dactylorhiza maculata (L.) Soó (Orchidaceae), which grows in the natural conditions of the Central European part of Russia, was studied using gas chromatography with a mass spectrometric detector. The plant material contains cycloartenol, cycloeukalenol, campesterol, brassicasterin, β-sitosterol, stigmasterol and ergosterol, which was found in underground organs and belong to mycosymbiont. The ergosterol content in the adventitious roots is five times higher compared to the endings of stem root tuberoids. The phytosterols content of the aboveground organs of D. maculata is more diverse than that of the underground organs. The basic sterol of D. maculata is β-sitosterol (60%), which is present in all organs. Also a high amount was noted for cycloartenol (20%), which is absent in the stem. Cycloeukalenol (7%) was found in inflorescences and leaves, campesterol (2%) in inflorescences, brassicasterin (5%) in the adventitious roots, stigmasterol (5%) in the leaves. Differences in the sterol statuses of organs can be explained by the biochemical characteristics of their tissues and the uneven functional significance of the identified compounds for the growth and development of generative individuals of D. maculata in the budding phase. The results obtained indicate the diversity of phytosterol compounds and their uneven content in various organs of the studied plant object.

scholarly journals Evaluation of freezing injury in temperate fruit trees

2020 ◽  
Vol 61 (5) ◽  
pp. 787-794
Author(s):  
Duk Jun Yu ◽  
Hee Jae Lee
Keyword(s):  
Fruit Trees ◽  
Freezing Stress ◽  
Freezing Injury ◽  
Triphenyl Tetrazolium Chloride ◽  
Natural Conditions ◽  
Visual Evaluation ◽  
Tetrazolium Chloride ◽  
Cultural Strategies ◽  
Analysis Determination

Abstract Freezing is a major environmental stress limiting the geographical distribution, growth, and productivity of temperate fruit trees. The extent of freezing injury in the trees depends on the rate at which the temperature decreases, the minimum temperature reached, and the duration of the freezing conditions. The ability to tolerate freezing temperatures under natural conditions varies greatly among fruit tree species, cultivars, and tissues. Freezing injury must be precisely evaluated to reliably predict the winter survival and productivity of the trees in specific regions, to screen for tolerant species and cultivars, and to develop cultural strategies that reduce freezing stress. Various methods are used to evaluate freezing injury in temperate fruit trees under field and artificial conditions, including visual evaluation of tissue discoloration, thermal analysis, determination of electrolyte leakage, and triphenyl tetrazolium chloride reduction analysis. In this review, we describe the most frequently used experimental procedures for evaluating freezing injury.

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