Comparison of the growth characteristics of the biodegradable container seedlings and the containerized seedlings during one year after planting

U radu su prikazane značajke rasta jednogodišnjih biljaka sladuna u uvjetima potpunog svjetla u poljskom pokusu 2016. godine. U odnosu na višegodišnji prosjek (1981.–2010. godine) srednja temperatura zraka u vegetacijskom razdoblju 2016. godine bila je veća za 1.3<sup>°</sup>C, a količina oborina za 30.1 mm. Broj ožiljaka terminalnih pupova na jednogodišnjim biljkama sladuna (Slika 1), definira broj faza rasta u visinu na temelju kojega su izdvojeni tipovi rasta biljaka: biljke s jednofaznim, dvofaznim i trofaznim rastom. U analiziranom uzorku, 39,8% biljaka pripada jednofaznom tipu rasta, 58,2% dvofaznom, a svega 2,0% trofaznom tipu rasta (Slika 2). S obzirom na mali broj biljaka s trofaznim rastom u visinu, sve biljke su podijeljene u dvije skupine: biljke sa jednofaznim i biljke sa višestrukim rastom u visinu (Tablica 2). Postoje statistički značajne razlike u varijancama uzoraka kod svih značajki rasta između biljaka s jednofaznim i višestrukim rastom na razini p < 0,05, a na razini p < 0,01 između srednjih vrijednosti svih analiziranih elemenata rasta između biljaka s jednofaznim i višestrukim rastom. Primjetno je da raspodjela svih elemenata rasta varira između dvije definirane skupine biljaka. S obzirom na visinu primarnog rasta (H<sub>1</sub>), biljke s jednofaznim rastom su po apsolutnoj varijabilnosti nešto manje varijabilne, a po relativnoj duplo manje varijabilne od biljaka s višestrukim rastom, s blago pozitivnom asimetrijom. Što se tiče ukupne visine, biljke sa višestrukim rastom su znatno varijabilnije kako glede apsolutne varijabilnosti, tako i relativne varijabilnosti i s više izraženom desnom asimetrijom u odnosu na biljke s jednofaznim rastom. Kod biljaka s višestrukim rastom, apsolutna varijabilnost broja listova je dvostruko veća, a ukupne površine listova trostruko veća s izraženom desnom asimetrijom u usporedbi s biljkama s jednofaznim rastom. Postoje značajne razlike između raspodjela biljaka s jednofaznim i višestrukim rastom u visinu. Biljke s jednofaznim rastom imaju manju ukupnu visinu, manji promjer korjenovog vrata, manji broj i ukupnu površinu listova, ali se odlikuju većom srednjom visinom primarnog rasta u odnosu na biljke sa višestrukim rastom, što ukazuje na različite značajke rasta u početnoj fazi i tijekom vegetacijskog razdoblja između ovih tipova biljaka.

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Container and root treatments affect growth and root form of planted ponderosa pine

Canadian Journal of Forest Research ◽

10.1139/x78-036 ◽

1978 ◽

Vol 8 (2) ◽

pp. 232-236 ◽

Cited By ~ 4

Author(s):

Peyton W. Owston ◽

K. W. Seidel

Keyword(s):

Ponderosa Pine ◽

Field Performance ◽

Root Systems ◽

Average Height ◽

Container Seedlings ◽

Bare Root ◽

One Year

Field performance and root form of container-grown Pinnsponderosa Laws. seedlings were studied after application of three treatments and compared with untreated bare-root seedlings. One-year-old seedlings grown in 1.9-ℓ milk carton containers were treated by (1) removing the bottom of the container, (2) removing the whole container, and (3) removing the whole container and cutting spiralled roots off at the bottom of the surface of the root ball. Survival was excellent for trees of all treatments. Bare-root seedlings grew most in height the first season, but after 5 years, the average height of container seedlings was greater than for bare-root trees. Seedlings with container removed and roots cut were tallest and had root systems that appeared sturdiest. Most of these had well developed taproots and good outward growth of laterals with little spiralling. Aborted or kinked taproots and spiralled laterals were often found where only the bottom of the container had been removed.

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Preliminary results of renewal pruning an 18 years old sour cherry trees

International Journal of Horticultural Science ◽

10.31421/ijhs/19/3-4./1101 ◽

2013 ◽

Vol 19 (3-4) ◽

Author(s):

B. Vaszily

Keyword(s):

Sour Cherry ◽

Growth Characteristics ◽

Preliminary Results ◽

Excellent Quality ◽

Fruit Species ◽

One Year ◽

Willow Trees ◽

Cherry Trees

Sour cherry is a light demanding fruit species. As most of the crop is developing from buds on one year old shoots and 2-yearold wood, the formation of bare wood can be seen apparently in a badly maintained canopy. The formation of „whip shoots” indicates the degree of bare wood. Unfortunately in many gardens and commercial orchards sour cherry trees resemble willow trees. Owners often decide to grub old orchards, although the useful cropping lifespan of the trees planted in a correct spacing can be 20-30 years on a move vigorous rootstock. Therefore renewal pruning can contribute to the full renewal of the orchard, but the length of its effect is depending on the growth characteristics and renewal capabilities of the cultivar. The growth characteristics of the cultivars are different. The regeneration capabilities of different aged wood are also different. These differences emphasize the need for cultivar specifi c pruning. Knowing the reactions to renewal pruning, we can ensure regular high crops with excellent quality by applying cultivar specifi c rotation pruning.

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PRODUCTION AND PERSISTENCE OF SHORT-TERM RYEGRASSES IN THE NORTHERN NORTH ISLAND

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.1989.50.1882 ◽

1989 ◽

pp. 237-242

Author(s):

N.S. Percival ◽

G.J. Goold ◽

G.J. Piggot ◽

L.J. Cranshaw

Keyword(s):

Growth Characteristics ◽

Italian Ryegrass ◽

Seasonal Growth ◽

Short Term ◽

Grazed Pastures ◽

One Year ◽

Apparent Ability

A range of short-term ryegrasses. including the Grasslands cultivars Moata, Paroa. Tama and Manawa, and Progrow and Corvette, were evaluated at 4 sites in Northland, Waikato and Bay of Plenty. At three of the sites comparisons were also made with Ellett or'Grasslands Nui perennial ryegrasses. Tama and Progrow had strong winter growth but later were relatively poor. Moata and Paroa had stronger spring growth than Tama or Progrow. The persistence beyond one year of Moata and Paroa in grazed pastures was poor. Corvette, an Italian ryegrass ecotype from near Tauranga, had consistently higher yields than Manawa, Moata or Paroa This sometimes increased total pasture yields. Corvette also had ability to persist at least 4 years after sowing. None of the short-term ryegrasses gave summer or autumn productivity as high as Nui or Ellett ryegrasses. A mixture of Ellett and Corvette showed seasonal growth characteristics of both cultivars, implying a production advantage over either sown alone. This paper advocates re-evaluating the role of short-term ryegrasses in the Auckland Province, consequent on the apparent ability of Corvette to co-exist with perennial ryegrasses. Keywords: Italian ryegrass. Moata, Paroa, Te Puna. Corvette, Tama, Progrow, Manawa, Nui, Ellett, persistence

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Non-genetic effects on growth characteristics of Brahman cattle

Revista Mvz Córdoba ◽

10.21897/rmvz.72 ◽

2015 ◽

pp. 4427-4435 ◽

Cited By ~ 1

Author(s):

Nicacia Hernández-Hernández ◽

Juan Martínez-González ◽

Gaspar Parra-racamonte ◽

Martín Ibarra-Hinojosa ◽

Florencio Briones-Encinia ◽

...

Keyword(s):

Birth Weight ◽

Rainy Season ◽

Genetic Factors ◽

Management Strategies ◽

Growth Characteristics ◽

Season Of Birth ◽

Birth Season ◽

Brahman Cattle ◽

Productive System ◽

One Year

Objective. To determine how some non-genetic factors influence weights at birth (BW), weaning (WW) and yearling (YW) of Brahman calves. Materials and methods. Data corresponding to 58257, 57045 and 40364 for BW, WW and YW, respectively, were analyzed. The models included the effects of year and season of birth and sex, and were considered simple interactions. Results. All effects were significant (p<0.05) for BW, WW and YW. Only the season of birth didn’t have a significant effect (p>0.05) on WW. The average general BW, WW and YW were 32±3.2, 188±37.7 and 291±56.8 kg, respectively. Variables evaluated that take into account the year of birth show a trend to increase weight each year. In relation to the birth season on BW and YW, it was observed that calves born during the rainy season were heavier than those born during the dry season. Similarly, male calves were heavier than females at birth, weaning and one year of age. The effects of the analyzed interactions were significant (p<0.05) for the three variables, except for the season of birth per sex interaction, which did not have a significant effect (p>0.05) for BW and WW. Conclusions. The studied non-genetic factors were important and should be taken into account in management strategies when striving to increase the efficiency of the productive system. Key words: Zebu, birth weight, weaning weight, year weight. (Source: AIMS)

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