Temat: fertile - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: From circle to rectangle. Evolution of the architectural plan in the early Neolithic in the Near East
Autorzy:: Białowarczuk, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/1706163.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:: architecture
plan evolution
PPNA
Fertile Crescent
Neolithic
Opis:: Transformation of the plan seems to be one of the most fundamental characteristics of architectural evolution during the PPNA stage. It starts with simple round monocellular structures and ends with the invention of modular subrectangular ones, divided into many rooms. However, the evolution of some types of buildings in different regions of the Fertile Crescent was varied in pace. A major question are the main factors causing such regional differences. This paper presents a basic typology of early Neolithic structures and their regional diversification, which could result from individual dynamics of the development of original types stimulated by regionally invented practical and technical solutions. Two variants of the process were distinguished. The first is the evolution from a primitive shelter to open, free-standing durable forms of round houses. The other variant was the development from shelters to large round subterranean houses. Different regions of the Near East adopted one of these two variants. Each featured specific traits and determined further regional development of plan.
Źródło:: Polish Archaeology in the Mediterranean; 2016, 25; 575-593
1234-5415
Pojawia się w:: Polish Archaeology in the Mediterranean
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Seedling growth, root development and nutrient use efficiency of Cypress clones in response to calcium fertilizer
Autorzy:: Zhang, Z.
Jin, G.
Zhou, Z.
Powiązania:: https://bibliotekanauki.pl/articles/2078194.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Cupressus funebris
root development
nutrient accumulation efficiency
calcium response
fertile
soil
low fertility soil
Opis:: Cypress (Cupressus funebris Endl.) is an important tree species in the subtropical regions of China; it is also a major tree species for afforestation and forest land restoration under low-fertility soil conditions. Cypress is considered a calcicolous tree, and its growth and development can be promoted significantly by exchangeable calcium (Ca2+) in the soil. However, most of the subtropical regions have low-fertility acidic soils, in which Ca2+ gradually becomes a limiting element for Cypress growth. In this study, different concentrations of Ca2+ fertilizer were added under fertile soil (3 g kg−1 NPK fertilizer added) and low-fertility soil (0 g kg−1 NPK fertilizer added) conditions. Cypress clones responded differently to Ca2+ addition in different soil conditions. The seedling height and dry matter quality of Cypress in fertile soil were significantly greater than those in low-fertility soil, but plant height and dry biomass did not differ significantly among Ca2+ treatments. The accumulation efficiencies of nitrogen (N), phosphorous (P) and Ca all differed significantly among the Ca2+ treatments. In low-fertility soil, the addition of 3 g kg-1 Ca2+ significantly promoted development of roots 0.5–2 mm in diameter, and both the C1 and C2 clones achieved their highest N, P and Ca accumulation efficiencies. When the Ca2+ concentration increased to 6 g kg−1, the seedling height, dry matter quality and root development were lower than those of the 3 g kg−1 Ca2+ treatment. In the fertile soil, the addition of Ca2+ significantly inhibited development of roots 0.5–1 mm in diameter. The highest N accumulation efficiency was achieved under the 0 g kg−1 Ca2+ treatment, and the highest Ca accumulation efficiency was achieved under the 6 g kg−1 Ca2+ treatment. Seedling height, root dry weight, roots 0–1.5 mm in diameter and Ca accumulation showed a significant interaction effect between NPK fertilizer and Ca2+. Therefore, Ca accumulation was more efficient in low-fertility soils. Under low-fertility soil conditions, the addition of CaSO4 can promote the root development of seedlings and advance and prolong the fast growth period of seedling height. Cypress clones can be used as an important tree species for afforestation under low-fertility soil conditions, especially under calcareous soil conditions.
Źródło:: Dendrobiology; 2020, 84
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki