Seasonal variation of growth and development of the roots of five second year conifer species in the nursery

1983 ◽  
pp. 55-62
Author(s):  
C. G. Langlois ◽  
L. Godbout ◽  
J. A. Fortin
Keyword(s):  
Seasonal Variation ◽  
Growth And Development ◽  
Conifer Species ◽  
Second Year

Seasonal variation of growth and development of the roots of five second year conifer species in the nursery

1983 ◽  
Vol 71 (1-3) ◽  
pp. 55-62 ◽  
Author(s):  
C. G. Langlois ◽  
L. Godbout ◽  
J. A. Fortin
Keyword(s):  
Seasonal Variation ◽  
Growth And Development ◽  
Conifer Species ◽  
Second Year

Growth and Development of Melon Manis Terengganu in Response to Seasonal Variation

2021 ◽  
Vol 20 (4) ◽  
pp. 659-664
Author(s):  
Ying Qian Ong ◽  
Mohammad Moneruzzam
Keyword(s):  
Seasonal Variation ◽  
Growth And Development

Growth and Development of Bigroot Morningglory (Ipomoea pandurata)

1991 ◽  
Vol 5 (4) ◽  
pp. 805-810 ◽  
Author(s):  
Michael J. Horak ◽  
Loyd M. Wax
Keyword(s):  
Root Growth ◽  
Growth And Development ◽  
Dry Weight ◽  
First Year ◽  
Growing Degree Days ◽  
Degree Days ◽  
Root:Shoot Ratio ◽  
Shoot Dry Weight ◽  
Second Year ◽  
Final Harvest

Growth and development of bigroot morningglory was observed and quantified. Emergence occurred 75 ± 5 growing degree days (GDD) after seeding. Flower and seed production began 630 ± 20 GDD after emergence and continued until the first frost killed the shoots. Seedlings needed approximately 460 GDD of growth to become perennial. In the second year of growth, plants emerged in early May and flowered within 425 ± 50 GDD. Shoot dry weight accumulation in first-year plants was 3.5 g for the first 600 GDD after which a fifteenfold increase in dry weight occurred. Root growth followed the same pattern, however the large increase in dry weight occurred approximately 300 GDD later than that of the shoots. The root:shoot ratio was 0.2 to 0.3 for the first 900 GDD and increased to greater than 1.0 by the final harvest.

scholarly journals Effect of plant’s alimentation area on productivity of Oregano plants (Origanum vulgare L.) under conditions of a drip irrigation

2020 ◽  
pp. 68-75
Author(s):  
N. V. Pryvedeniuk ◽  
A. P. Shatkovskyi
Keyword(s):  
Leaf Area ◽  
Drip Irrigation ◽  
Growth And Development ◽  
Plant Nutrition ◽  
Aerial Part ◽  
First Year ◽  
Maximum Height ◽  
Origanum Vulgare ◽  
Aerial Parts ◽  
Second Year

Oregano (Origanum vulgare L.) – is a perennial medicinal plant, its medicinal raw material is the aerial part collected in the flowering phase. When laying industrial plantations of oregano, the seedling method of propagation is mainly used, since after germination the plants slowly develop and compete weakly with weeds. The condition for survival of seedlings is high soil moisture, which can be achieved only with its artificial wetting - irrigation. An analysis of the literature indicates that today the issue of the cultivation pattern and nutrition area of oregano in the conditions of drip irrigation is not well understood. The aim of the conducted experimental studies was to establish the influence of the method of growing seedlings and plant’s alimentationon area on the growth and development of oregano under drip irrigation. The main research method is a field experiment, supplemented by analytical and static data processing methods. According to research’s results, it has been established that an increase in the area of plant nutrition contributes to an increase in the mass of the aerial parts and the area of leaves, and also reduces the height of plants during both the first and second years of vegetation. It was proved that the most favorable conditions for plant’s growth and development under the conditions of drip irrigation were in the variant with the largest nutrition area with planting density of 41,7 thousand plants·ha-1 (60x40 cm pattern). The mass of the aerial parts of plants with this method of growing in the first year of vegetation was 110,5-133,0 g ·plant-1 with the largest leaf area – 0,287-0,346 m2·plant-1 and 218,1-328,7 g ·plant-1, 0,568-0,855 m2·plant-1, respectively - in the second year of vegetation. The maximum height of plants – 37,0-37,7 cm in the first year of plant vegetation and 68,5-72,6 cm in the second year of vegetation was established in the variants with the smallest plant nutrition area: with a growing scheme of  60x10 cm (166,7 thousand ·ha-1). The smallest plant’s height in the first year of vegetation was 31,1-33,5 cm, in the second year – 37,5-48,4 cm in the variant of growing scheme 60x40 cm (41,7 thousand plants ·ha-1). When studying the influence of the method of growing seedlings on the mass of the aerial part and the area of leaves, their high parameters were found in variants with the laying of seedlings from spring sowing cassettes, where the mass of the aerial part was 103,8 g / plant with a leaf area of 0,236 m2 ·plant-1. The minimum weight of the aerial part is 92,3 g·plant-1 with a leaf area of 0,210 m2 ·plant-1 was found in variants with seedlings on cassettes from the autumn sowing period.

The effect of drip irrigation on the growth and development of plum seedlings in a nursery-garden in the conditions of the Central Non-Black Soil Region of Russia

2020 ◽  
pp. 6-11
Author(s):  
Nikolay Dubenok ◽  
Aleksandr Gemonov ◽  
Aleksandr Lebedev
Keyword(s):  
Drip Irrigation ◽  
Growth And Development ◽  
Black Soil ◽  
First Year ◽  
Moisture Capacity ◽  
Soil Zone ◽  
Black Soil Region ◽  
Russian State ◽  
Fruit Growing ◽  
Second Year

One of the possible ways to ensure safety is to use drip irrigation, which also improves the quality and productivity of crops. The aim of the work is to study the availability of moisture in the soil for the growth and development of cream seedlings grown in a fruit nursery in the conditions of the Non-Black Soil Zone of Russia. Research conducted on the lands of the educational experimental farm of the fruit-growing laboratory «Michurinsky Garden» of the Russian State Agrarian University – Moscow Timiryazev Agricultural Academy in 2018 and 2019. The results of field experience indicate that for a more rational use of irrigation water and obtaining highquality vegetable oils in the nursery, it is recommended to use an irrigation regime with maintaining soil moisture in the range of 80–100 % lowest moisture capacity with a dredging depth of 30 cm in the first year and 40 cm in the second year.

Photoperiodism and sexual activity in Merino ewes. II. The effect of equinoctial light on sexual activity

1961 ◽  
Vol 12 (1) ◽  
pp. 147 ◽  
Author(s):  
HM Radford
Keyword(s):  
Seasonal Variation ◽  
Sexual Activity ◽  
The Other ◽  
Light Environment ◽  
Control Groups ◽  
Photoperiodic Control ◽  
Second Year ◽  
The One

Merino ewes were subjected to equinoctial light for 2 years; some continued to exhibit seasonal variation in sexual activity while others exhibited continuous sexual activity. Continued seasonal variation in sexual activity in equinoctial light is at variance with existing hypotheses for photoperiodic control of sexual activity in ewes, and alternative explanations for such behaviour are discussed. Two groups, each of five Merino ewes, were subjected to a light environment of 12 hr light : 12 hr dark, the one group from the autumn, the other from early in the spring of the same year. In the first group, all ewes failed to experience anoestrus during their first spring, but two ewes experienced anoestrus during the spring of the second year. In the second group, three ewes experienced anoestrus later in the spring in which treatment commenced, and the same three experienced anoestrus during the spring of the second year of the experiment. In these five ewes which exhibited seasonal variation in sexual activity, the anoestrous periods were of shorter duration, but occurred at the same season as those in ewes of two control groups.

Clutch size in eastern phoebes (Sayornis phoebe) II: age effects and seasonal variation

1993 ◽  
Vol 71 (9) ◽  
pp. 1738-1742 ◽  
Author(s):  
Kelvin F. Conrad ◽  
Raleigh J. Robertson
Keyword(s):  
Seasonal Variation ◽  
Clutch Size ◽  
Egg Production ◽  
Age Classes ◽  
Female Age ◽  
Linear Decrease ◽  
Double Brooding ◽  
Second Year ◽  
Pattern Of Variation ◽  
Seasonal Decline

We examined seasonal variation in clutch size among single- and double-brooding eastern phoebes to learn how the pattern of variation among female age-classes and early and late-season breeders contributed to overall seasonal variation in clutch size. Clutch sizes of eastern phoebes did not decline predictably (linearly or quadratically) with season when we considered all clutches laid over the season, nor when the first and second clutches of double-brooding birds were each regarded separately. Total seasonal egg production by double-brooding second-year (SY) females declined linearly with season but that of after-second-year (ASY) females did not. Among single-brooding females, which were nearly all SY birds, clutch size, and hence total seasonal egg production, were unaffected by season. In general, SY birds bred later, laid fewer eggs, and were less likely to double-brood than ASY birds. The large seasonal variation in clutch size for the entire population was influenced by two different groups of SY females: (1) double-brooding SY females that nested at the same time as double-brooding ASY birds and had similar clutch sizes, but showed a linear decrease in total seasonal egg production versus initiation date, and (2) single-brooding SY females that nested after double-brooding females, had clutch sizes similar to double-brooding females, and showed no linear decrease in total seasonal egg production versus initiation date. Combined with double-brooding ASY females, these two groups of SY birds increase the variation in clutch size observed on any given day and obscure the pattern of seasonal decline commonly reported for other species.

scholarly journals Socio-economic characteristics of camel (Camelus dromedarius) marketers in Mai'adua livestock market, Katsina State, Nigeria

2021 ◽  
Vol 43 (1) ◽  
pp. 361-369
Author(s):  
M. I. Ghude ◽  
S. A. Maigandi ◽  
I. R. Muhammad ◽  
H. A. Alkali
Keyword(s):  
Seasonal Variation ◽  
Growth And Development ◽  
High Price ◽  
Physiological Status ◽  
Stages Of Growth ◽  
Major Constraint ◽  
Rain Season ◽  
Males And Females ◽  
Camel Meat ◽  
Age Category

The study was conducted to assess the socio-economic characteristics of camel marketers at Mai'adua livestock market in Katsina state. Random technique methods were used to select 45 marketers and an interview was used to generate the information. All the correspondents were males and married. Majority (46.67%) were between the age category of 35-40 years and only 11.11% were 55 years and above. Majority (75.56%) attended Qur'anic schools. Niger republic was the major source of the camels as indicated by 68.89% of the respondents while 17.78% and 11.11% indicated Katsina and Jigawa states respectively. Among the animal brought to the marker for sales males out-numbered the females while in the frequency of sales, females out-numbered the males because of variation in prices as indicated by 71.17% and 55.5% of the respondents respectively. Majority of the camels purchased were transported to Kano main abattoir for slaughter: There was variation in prices between males and females, stages of growth and development and physiological status. Camel calf (male) had a high price of N70,000 and above while that of female costs N60,000 and above, bull and heifer are sold at a minimum of N90,000 to N95,000 and N70.000 to N75,000 while old camel bull and cow were sold at medium price of between N160,000-N165,000 and N130,000-N135,000 respectively. However; (53.33%) of the respondents indicated lack of weighing devices as a major constraint and most (46.67%) indicated inconsistency in pricing among others. I seasonal variation was said to determine the demand. During early rain' season, farmers purchased male camel bulls for farming activities as indicated by the respondents (40.00%). Lack of awareness on the importance of camel meat also posed a constraint as camel meat was widely consumed (73.33%) in the area. Cost of camels increased during Eid-El-Kabir as indicated by 44.44%. The study reported information on marketing, sources, uses and destination of camels respectively.

scholarly journals Growth and development of the wild-growing subshrub Salsola orientalis SG Gmel. in culture under conditions of the Central Asian desert

2021 ◽  
Vol 901 (1) ◽  
pp. 012035
Author(s):  
E Z Shamsutdinova ◽  
Z Sh Shamsutdinov
Keyword(s):  
Growth And Development ◽  
Life Form ◽  
Plant Density ◽  
First Year ◽  
Ecological Stability ◽  
Central Asian ◽  
Second Year ◽  
Forage Value ◽  
First Year Of Life ◽  
Degraded Pastures

Abstract In terms of life form Salsola orientalis S.G. Gmel. is a semi-shrub; its height reaches 40–60 cm; in terms of ecology, it is a haloxerophyte, extremely resistant to salt stress, air, and soil droughts. Salsola orientalis is a highly nutritious forage plant containing up to 20% protein in the budding phase. High resistance to environmental stress and good forage value allow us to consider it as a promising plant – its introduction into culture allowed restoring the forage productivity of degraded pastures in the Central Asian desert. The features of growth and development of Salsola orientalis were studied for ecological and biological characteristics and the possibility of introducing it into culture. It was found that the laboratory germination of seeds of the wild-growing half-shrub Salsola orientalis was quite high – 20–60%; field germination was very low – 0.1–1.7%. The survival rate of seedlings in young plants depends on environmental conditions and plant density. Under conditions of the Central Asian desert the plants basically die in the first year, especially in the germination phase; in the second year we registered insignificant losses; in subsequent years the number of plants stabilized. Salsola orientalis was found to be a fast growing plant, forming a normal half-shrub in the first year of life. The high ecological stability of Salsola orientalis in combination with its deeply penetrating and powerfully developed root system ensures vigorous and rapid growth. Under conditions of the Central Asian desert Salsola orientalis yields 1.3–1.7 t/ha of dry fodder mass, which is 4–5 times higher than the fodder productivity of natural desert pastures.

OUTLINES FOR WELL BABY CLINICS

PEDIATRICS ◽  
1948 ◽  
Vol 2 (1) ◽  
pp. 69-73
Author(s):  
EDITH S. HEWITT ◽  
C. ANDERSON ALDRICH
Keyword(s):  
Physical Examination ◽  
Social Adjustment ◽  
Growth And Development ◽  
Bowel Movement ◽  
First Year ◽  
Night Sleep ◽  
Health Project ◽  
Second Year ◽  
Attending Physicians ◽  
Adult Diet

IN 1946 we presented a description and explanation of a set of cards used by the Rochester Child Health Project in its well baby clinics. These cards, it was hoped, would help the attending physicians to learn about and to record the evidences of growth and development of babies as they appear in the first twelve months of life. In this article we shall describe and explain a similar set of cards devised for use in the second year. After the first year, growth and development are not so rapid as they are earlier; the changes from month to month are not so evident and methods of managing a child need not be altered so frequently. Therefore the mothers are asked to bring children in for conferences at fourteen, sixteen, eighteen, twenty-one and twenty-four months of age only. Thus, only five cards are needed in the second year. The following material appears on the respective cards. Information given under the numbered headings appears on the faces of the cards; the explanatory notes are printed on the reverse. CARD 1. SUBJECTS TO BE CONSIDERED AT THE AGE OF FOURTEEN MONTHS 1. Development : Baby walks; may even be able to run and climb. Pushes, pulls and piles large objects. May turn pages of a book one at a time. 2. Habits: Eating—Baby may have full adult diet, except for nuts, berries, fat meats and highly seasoned foods. May continue to have bedtime bottle if he desires it. Self-feeding with fingers, spoon, cup or glass should be encouraged even if result is messy. Sleeping—Baby's night sleep may be disturbed. May take one or two naps, tending toward one. Elimination—Bowel: Baby may indicate time for bowel movement. Bladder: Mother may "catch" urine in toilet; if not successful, she should stop trying for two or three weeks; progress should not be forced. Mother understands meaning of "catching" from explanation given her concerning bowel control when child was in sixth month of life. 3. Social adjustment: Baby is becoming increasingly independent; wants to help undress and feed himself; objects to play pen. Enjoys the rhythm of singing, of the radio and of being read to. Speech—Baby can say a word or two, especially if composed of repeated syllables (mama, byebye). 4. Physical examination: Examiner records anything noteworthy.

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