- Tytuł:
-
Wczesność odmian traw w siewach czystych jako kryterium terminu zbioru pierwszego pokosu
Earliness of cultivars of some grass species in pure stands as a criterion of the first cut - Autorzy:
-
Janicka, M.
Borawska, B. - Powiązania:
- https://bibliotekanauki.pl/articles/807132.pdf
- Data publikacji:
- 1997
- Wydawca:
- Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
- Tematy:
-
trawy
siew czysty
gatunki roslin
wczesnosc kwitnienia
pedy generatywne
liczba pedow kwiatostanowych
fazy rozwojowe
rozwoj roslin
nawozenie azotem
dawki nawozowe
terminy zbiorow
pokos pierwszy - Opis:
- The aim of the studies was determination of the earliness of six grass species represented by 21 cultivars and checking if the development of generative shoots is dependent on nitrogen fertilization. The studies were carried out in 1994-1995 at natural moderately wet meadow site on mineral soil. Two rates of nitrogen N1 and N2 (80 and 160 kg/ha) have been applied. Cultivars of investigated species differed in the term of heading which is a criterion of the first cut. The species with the greatest differentiation in the earliness of cultivars were Poa pratensis -12 days and Dactylis glomerata (20 days - 1994); less differences were found for cultivars of Lolium perenne - 7 days. The range between the earliest cultivar Beata of Poa pratensis and the latest one Arka of Lolium perenne was above 30 days. The higher rate of nitrogen (160 kg per ha) had no significant effect on the development of generative shoots. Weather conditions in the spring influenced very clear the development of generative shoots of grass species and cultivars. Moderate temperatures (1994) caused greater range of earliness of cultivars and gave the possibility of extension of the first cut. High temperatures (1995) were conducive to generative shoots formation and caused equalization of the cultivar earliness.
- Źródło:
-
Zeszyty Problemowe Postępów Nauk Rolniczych; 1997, 439
0084-5477 - Pojawia się w:
- Zeszyty Problemowe Postępów Nauk Rolniczych
- Dostawca treści:
- Biblioteka Nauki
Artykuł