scholarly journals Abnormally Early Nesting of Acanthis cannabina (Linnaeus, 1758) (Fringillidae, Aves) in the Latryk River Valley (Saratov Region)

2020 ◽  
pp. 367-373
Author(s):  
V. G. Tabachishin ◽  
M. V. Yermokhin
Keyword(s):  
Ultraviolet Radiation ◽  
Meteorological Factors ◽  
Field Research ◽  
Reproductive Period ◽  
River Valley ◽  
Daily Temperature ◽  
Early Start ◽  
Local Climate ◽  
Saratov Region ◽  
Average Daily Temperature

During our field research in March–May of 2017–2020 in the valley of the Latryk river (Saratov region), it was found that the phenological norm of the beginning of the nesting period of Acanthis cannabina should be dated as the last decade of April. However, under conditions of the local climate transformation, its stability is lost and the emergence of an abnormally early start of the reproductive period of A. cannabina becomes possible. The oviposition onset of A. cannabina could be stimulated by two meteorological factors, namely, a rapid increase in the average daily temperature and, to a greater extent, an increased intensity of ultraviolet radiation in the spring.

scholarly journals Estimation of seasonal boundaries using temperature data: a case of northwest part of Bangladesh

2020 ◽  
Vol 6 (1) ◽  
pp. 50-62
Author(s):  
Syed Mustafizur Rahman ◽  
Syed Mahbubur Rahman ◽  
Md. Shuzon Ali ◽  
Md. Abdullah Al Mamun ◽  
Md. Nezam Uddin
Keyword(s):  
Spectral Analysis ◽  
Crop Productivity ◽  
Temperature Data ◽  
Daily Temperature ◽  
Temperature Cycle ◽  
Local Climate ◽  
Higher Power ◽  
Cycle Plays ◽  
Maximum Temperatures ◽  
Harmonic Analyses

Abstract Seasons are the divisions of the year into months or days according to the changes in weather, ecology and the intensity of sunlight in a given region. The temperature cycle plays a major role in defining the meteorological seasons of the year. This study aims at investigating seasonal boundaries applying harmonic analysis in daily temperature for the duration of 30 years, recorded at six stations from 1988 to 2017, in northwest part of Bangladesh. Year by year harmonic analyses of daily temperature data in each station have been carried out to observe temporal and spatial variations in seasonal lengths. Periodic nature of daily temperature has been investigated employing spectral analysis, and it has been found that the estimated periodicities have higher power densities of the frequencies at 0.0027 and 0.0053 cycles/day. Some other minor periodic natures have also been observed in the analyses. Using the frequencies between 0.0027 to 0.0278 cycles/day, the observed periodicities in spectral analysis, harmonic analyses of minimum and maximum temperatures have found four seasonal boundaries every year in each of the stations. The estimated seasonal boundaries for the region fall between 19-25 February, 19-23 May, 18-20 August and 17-22 November. Since seasonal variability results in imbalance in water, moisture and heat, it has the potential to significantly affect agricultural production. Hence, the seasons and seasonal lengths presented in this research may help the concerned authorities take measures to reduce the risks for crop productivity to face the challenges arise from changing climate. Moreover, the results obtained are likely to contribute in introducing local climate calendar.

scholarly journals Analysis of climate of Rivnenskyi Nature Reserve from 2000 to 2015

2018 ◽  
pp. 53-60
Author(s):  
Oleksandr Horbach
Keyword(s):  
Nature Reserve ◽  
Winter Season ◽  
Summer Season ◽  
Daily Temperature ◽  
Winter Period ◽  
Autumn Period ◽  
Average Daily Temperature ◽  
Spring Period ◽  
Unstable Temperature

The analysis of monthly climatic terms of Rivnenskyi Nature Reserve was conducted. It is marked that weather terms have substantial differences due to an unstable temperature condition since creation of reserve. A spring period was the shortest in 2013 – 64 days and had the greatest average daily temperature 11.9 °С. Protracted a spring period was in 2002 – 123 days. The most of precipitations in a spring period was fixed in 2008 – 196.2 mm, and the least in 2011 – 42.1 mm. A summer period in 2015 became the most protracted – 131 day. Moreover, the least protracted summer was in 2006 – 90 days. The warmest summer season was in 2010 with an average daily temperature 19.8 °С. The most raining summer was in 2007 when a 471.3 mm of precipitations is fixed, and the least raining summer was in 2002 (144.6 mm of precipitations). The most protracted autumn period was in 2006 – 107 days and the shortest one was in 2001 – 57 days. The warmest autumn was in 2004 when an average daily temperature reached 9.2°С. The most of precipitations in the autumn period is fixed in 2009 – 178 mm, and the least in 2001 – 39 mm. The winter periods were protracted in 2004/05 and 2005/06. Their duration was 114 days. Winter period in 2009/10 with an average daily temperature -7.9°С was the coldest one. The most precipitations are fixed in winter 2005/06 – 208.4 mm, and the least in a winter period 2012/13 are a 52.2 mm. The most of precipitations for a year fell out 777.8 mm in 2012, and the least one in 2011 – 427 mm. The average long-term dates of the beginning of the year seasons are defined. The average long-term date of the beginning of the spring season is on February 27; the summer season is on May 26; the autumn season is on September 14; the winter season is on December 5. Key words: Rivnenskyi Nature Reserve, seasons of the year, precipitation, climatic terms, temperature, long-term date.

scholarly journals Monitoring the phenology of Forsythia velutina, an endemic plant of Korea

2021 ◽  
Vol 24 (4) ◽  
pp. 355-363
Author(s):  
Jung-Won Sung ◽  
Geun-Ho Kim ◽  
Kyeong-Cheol Lee ◽  
Yun-Jin Shim ◽  
Shin-Gu Kang
Keyword(s):  
Life Cycle ◽  
Flowering Time ◽  
Plant Species ◽  
Meteorological Factors ◽  
Daily Temperature ◽  
Basic Data ◽  
Conservation Strategy ◽  
Endemic Plants ◽  
Flowering Period ◽  
Temperature And Humidity

Background and objective: This study was conducted on Forsythia velutina, a special plant, in Gyeongsangnam-do Arboretum under the Gyeongsangnam-do Forest Environment Research Institute, which is located in the southern part of Korea. Methods: The research aimed to analyze the flowering characteristics of the plant by calculating the optimal temperature and humidity according to the flowering time and flowering period for 8 years from 2010 to 2017 in order to provide basic data for bioclimate studies of endemic plants. Results: It was observed that the Forsythia velutina showed a life cycle from mid-March and to mid-November. Average growth period was 243 (± 6.5) days. In testing the reliability of a single variable according to the meteorological factors, the Cronbach’s Alpha was 0.701, which indicates that the findings were relatively reliable. The average date of flowering was March 16 (SD = 5.8) and the average date on which blossoms fall was March 29 (SD = 5.2). A substantial difference in flowering period was observed from year to year 11 to 23 days, with an average of 16 days (± 4.7). The temperature and humidity in February to March, which affect the flowering, were 2.9-5.5℃, and 66.5-73.0%, respectively, and showed differences every year. Conclusion: The correlation between flowering time and meteorological factors was positive, and the highest daily temperature and average daily temperature had the highest significance. When establishing basic data on plant species for the conservation of endemic plants, the changes in life cycle events and weather conditions are identified. It is believed that it will be helpful in establishing a conservation strategy for the plant species in the future.

scholarly journals MORPHOPHYSIOLOGICAL AND PRODUCTIVE RESPONSES OF SUNFLOWER VARIETIES TO IRRIGATION

2018 ◽  
Vol 31 (1) ◽  
pp. 143-150
Author(s):  
WELSON LIMA SIMÕES ◽  
MARCOS ANTONIO DRUMOND ◽  
ANDERSON RAMOS DE OLIVEIRA ◽  
SÉRGIO LUIZ GONÇALVES ◽  
MIGUEL JULIO MACHADO GUIMARÃES
Keyword(s):  
Flowering Time ◽  
Plant Height ◽  
Agricultural Research ◽  
Block Design ◽  
River Valley ◽  
Semiarid Region ◽  
Local Climate ◽  
Sao Francisco River ◽  
Randomized Block Design ◽  
São Francisco River

ABSTRACT The high luminosity rates and high annual average temperatures of the Brazilian semiarid region, combined with the use of irrigation and adaptability of the sunflower crop to local climate, favor increased achene yield due to acceleration of morphophysiological processes. The objective of this work was to evaluate the morphophysiological and productive characteristics of sunflower varieties grown under drip irrigation in the Sub-Mid São Francisco River Valley. The experiment was conducted in the Experimental Field of the Brazilian Agricultural Research Corporation (Embrapa Semiarid), in Petrolina, State of Pernambuco, Brazil, in a randomized block design, with 21 sunflower varieties and four replications. The variables evaluated were flowering time, plant height, number of live leaves, stem and capitulum diameter, number of lodged and broken plants, stem curvature, relative chlorophyll index, photosynthesis, stomatal conductance, transpiration, average leaf temperature, 1000-achene weight and achene yield of the sunflower varieties. The treatments presented flowering time of 43 to 59 days after sowing, plant height of 1.0 to 1.4 m, capitulum diameter of 0.154 to 0.221 m, chlorophyll content of 30.8 to 33.98 Spad units and 1000-achene weight of 35.61 to 80.30 g. The sunflower varieties V7 and V8 stood out, with achene yields above 2,960 kg ha-1 and low number of lodged and broken plants, indicating a greater adaptability irrigation crops in the Sub-Mid São Francisco River Valley.

Mean Daily Temperatures at the Ben Nevis and Fort-William Observatories

1910 ◽  
Vol 44 (2) ◽  
pp. 693-701 ◽  
Author(s):  
R. T. Omond
Keyword(s):  
Daily Temperature ◽  
Average Daily Temperature ◽  
Average Temperature ◽  
Stevenson Screen

Tables have been prepared of the average temperature at the Ben Nevis and Fort-William Observatories on each day of the year, using the records of the twenty years 1884 to 1903 inclusive. Table I. gives the average daily temperature at Ben Nevis, Table II. that at Fort-William, and Table III. the differences between them. These tables have been prepared as follows :—Ben Nevis Observatory.—In summer the dry- and wet-bulb thermometers were exposed in an ordinary Stevenson screen 4 feet above ground, and in winter in a smaller-sized double-louvred screen, placed on a ladder-like stand, and moved up or down so as to be always about 4 feet above the surface of the snow. These thermometers were read hourly, and the average of the dry-bulb readings for the 24 hours of each day is taken as the temperature of that day. Table I. is the arithmetical mean of the values so computed on each day of the year.

scholarly journals Вплив погодних умов веґетаційного періоду на елементи продуктивності та урожайність проса прутоподібного

2017 ◽  
pp. 50-55
Author(s):  
М. І. Кулик ◽  
І. І. Рожко
Keyword(s):  
Unit Area ◽  
Weather Conditions ◽  
Vegetation Period ◽  
Close Correlation ◽  
Daily Temperature ◽  
Average Daily Temperature ◽  
Quantitative Indices ◽  
The Third ◽  
Number Of Stems

З'ясовано вплив погодних умов веґетації на мінливість елементів продуктивності (висоти та густоти стеблостою) проса прутоподібного. Визначено вплив середньодобової температури повітря та суми опадів під час веґетації рослин на урожайність фітомаси культури в розрізі років дослідження. Наведено кореляційні залежності між кількісними показниками рослин (елементами продуктивності) третього–шостого років веґетації та урожайністю фітомаси проса прутоподібного. Встановлено, що урожайність сухої надземної веґетативної маси проса прутоподібного в більшій мірі обумовлюється кількістю стебел на одиницю площі у тісному взаємозв’язку із середньодобовою температурою повітря, в меншій мірі – висотою рослин та сумою опадів за веґетаційний період. The influence of weather conditions of vegetation on the variability of the elements of productivity (height and density of stems) of switchgrass is determined. The influence of average daily temperature of air and the amount of precipitation during vegetation of plants on the yield of phytomass of culture in terms of research years is determined. The correlation between quantitative indices of plants (elements of productivity) of the third–sixth years of vegetation and yield of phytomass of switchgrass is shown. It has been established that the yield of dry vegetative mass of switchgrass is largely determined by the number of stems per unit area in close correlation with the average daily temperature of air, to a less extent – the height of plants and the amount of precipitation during the vegetation period.

scholarly journals Forecasting Average Daily Temperature in the Khorasan Razavi Province

2019 ◽  
Vol 19 (52) ◽  
pp. 99-112
Author(s):  
Sayyed Mohamad Hosseini ◽  
Abdolhossein Adelzadeh
Keyword(s):  
Daily Temperature ◽  
Average Daily Temperature

scholarly journals Topography and Climate of Iraq

2020 ◽  
pp. 1-13
Author(s):  
Nadhir Al-Ansari
Keyword(s):  
Saudi Arabia ◽  
Mediterranean Climate ◽  
Daily Temperature ◽  
Mountain Region ◽  
The West ◽  
Average Daily Temperature ◽  
Average Temperature ◽  
The North ◽  
South Iraq ◽  
Semi Arid

Iraq is located between geographic coordinates 33 00 N, 44 00 E, and occupies a total area of 437,072 square kilometers. Land forms 432,162 square kilometers while water forms 4,910 square kilometers of the total area. Iraq is bordered by Turkey from the north. Iran from the east, Syria and Syria from the west, and Saudi Arabia and Kuwait from the south. Iraq can be divided according to the nature of the land terrain into 4 regions (Mountain Region, Plateau and Hills Regions, The Mesopotamian plain and Jazera and Western Plateau). The climate is mainly of continental, subtropical semi-arid type. The mountain region is of Mediterranean climate. In general, rainfall occurs from December to February or November to April in the mountain region. During winter the average daily temperature is about 16oC dropping at night to 2oC with possibility of frost. In summer however, it is very hot with an average temperature of over 45oC during July and August dropping to 25oC at night. Keywords: Topography, Climate, Iraq.

scholarly journals A Graphical Control Chart for Monitoring Leaf count of Easter Lily to Support Crop Timing Decisions

1996 ◽  
Vol 6 (1) ◽  
pp. 68-70
Author(s):  
P.R. Fisher ◽  
R.D. Heins
Keyword(s):  
Control Chart ◽  
Lilium Longiflorum ◽  
Daily Temperature ◽  
Flower Buds ◽  
Average Daily Temperature ◽  
Leaf Unfolding ◽  
Quantitative Models ◽  
Easter Lily ◽  
Intuitive Method ◽  
Over Time

A graphical control chart was developed to monitor leaf count of Easter lily (Lilium longiflorum Thunb.) and make temperature recommendations based on predictions of a leaf unfolding rate (LUR) model. The graph allows observed and target leaf count to be compared visually over time. Timing of the visible bud stage, when flower buds are visible externally on the plant, is important to time flowering for the Easter sales period. The optimum LUR and average daily temperature required to achieve a target visible bud date can be read directly from the chart. The approach provides an intuitive method for transferring quantitative models to growers.

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