Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 13

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  goosefoot
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The objective of the study was to determine the time of occurrence of the emergence, budding, fruiting and seed shedding stages, as well as the degree of advancement of the white goosefoot fruiting and diaspores shedding stages in fodder beet, spring wheat and faba bean crops under mechanical and chemical weed control. Phenological observations were conducted in the years 2000-2002 at 10-day intervals, starting from the day of crop sowing on alluvial soil made of light loam. Chemically weed controlled objects were treated with herbicides: fodder beet - le- nacil 80%; spring wheat - MCPA 30% + dicamba 4%; faba bean - linuron 50%. It was proven that the times of occurrence and the scale of the studied phenological stages of white goosefoot depended on the crop species, the in-crop weed control method and the pattem of weather conditions in the study years. White goose- foot had the most favourable conditions of growth in the fodder beet crop. The herbicides in the fodder beet and faba bean crops delayed the emergence and the time of occurrence of successive white goosefoot growth stages. These agents also decreased the degree of diaspores shedding by the weed species studied. The most white goosefoot specimens shed fruits on the mechanically weed controlled plots. The diaspores dissemination was promoted by a warm and moist growing season.
A field experiment was conducted in 2007 to 2009 at Experimental Station Brody of Poznań University of Life Sciences to determine the effect of tillage, including strip tillage, conventional tillage and no tillage on weed pressure in corn. Strip tillage implementation included coulter, shank, covering disks and rolling basket. Cultivated straps were 35 cm wide and 20 cm deep at fall and spring strip tillage, 35 cm wide and 10 cm deep at shallow spring strip tillage and about 10–15 cm wide and 20 cm deep at narrow spring strip tillage. Conventional tillage was performed in the fall or spring with moldboard plow at a depth of 20 cm. Weed density for individual species was recorded prior postemergence herbicide application. Weed emergence was over eight times lower in strip tillage compared with conventional tillage with emergence patterns in strip tillage generally similar to the no tillage. Main weed species were Chenopodium album and Echinochloa crus-galli and this weeds density the most depended on tillage.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.