Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 19

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:  root yield
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
Five sugar beet cultivars and three levels of foliar treatments (control, Humix universal plus and Biafit Gold) were examined in the field trial without irrigation founded in the years 2005-2007 on experimental base of Slovak University of Agriculture in Nitra in Dolna Malanta. The influence of weather condition on all the observed parameters was statistically highly significant. The used bioactive leaf preparations increased root yield, digestion and refined sugar content. Biafit Gold had positive impact on root yield and Humix universal plus on digestion and refined sugar content (statistically not significant). Cultivar had statistically high significant influence on all the observed parameters.
The problem in the cultivation of scorzonera is often poor, slow and non-uniform field emergence despite the use of seeds with high germination capacity for the sowing. The goal of the study was to determine the effect of pre-sowing laser stimulation of seeds on the germination, emergence and root yield of scorzonera. Seeds were irradiated with a He-Ne laser with wavelength of 632.4 nm. Two doses of laser beam irradiation were applied in terms of surface power density – 6 and 8 mW·cmˉ². Seeds were irradiated 1, 3 and 5 times, and the duration of each irradiation treatment was ca. 0.1 s. Seed treatment with laser light caused an increase of germination capacity, radicle length and dry weight of seedling, and an improvement of field emergence and only a partial increase of the total yield of roots. Depending on the irradiation dose applied, the germination capacity of the seeds increased by 1.5-13.2% in relation to the control. The most beneficial effect on the germination capacity and field emergence was that of the 5-time laser irradiation. Increase of total root yield as a result of pre-sowing seed irradiation was related with increased emergence.
The influence of year, weather conditions, cultivars and variants of Atonik and Polybor 150 applications on sugar beet root yield and digestion was observed in field polyfactorial trial. We observed that the most optimal variant for yield (58.87 t·ha-1) and digestion (19.90°S) was the variant C (Atonik: 0.4 dm3·ha-1 - 2. post-emergence herbicide application + Atonik + Polybor 150: 0.6 + 2.5 dm3·ha-1 - 3. postemergence herbicide application + Atonik + Polybor 150: 0.6 + 2.5 dm3·ha-1 - 1. fungicide treatment). Significant root yield values achieved the cv. Flair (+ 1.28 t·ha-1 compared with Swing) and digestion values achieved the cv. Swing (+ 0.26°S compared with cv. Flair). The highest root yield (70.68 t·ha-1) and digestion (24.85°S) were achieved in 2002 and 2004 at the cv. Swing.
A field experiment was conducted in 2002-2006 to investigate the severity of weed in­festation and roots yields in relation to weed management methods in American ginseng (Panax qumquefolium L.) cultivation. Hand-made weeding was compared to various her­bicides treatments. Herbicides application in American ginseng cultivation significantly limited species composition and number of weeds per 1 m2. The effects of application of 2.4 D and dicamba combined with fluazifop-p-butyl were superior to those of hand-made weeding, whereas other preparations (propyzamide and fluazifop-p-butyl, linuron and flu- azifop-p-butyl as well as prometryn and fluazifop-p-butyl) damaged ginseng plants which finally led to decrease of raw material.
Six seedling hypocotyl anatomical characters of sugar beet diploid lines and triploid hybrids were measured. Root yield and sugar content of these lines and hybrids were evaluated in replicated field trials. Some of the studied hypocotyl characters: the diameter of the central core, the diameter of parenchymatic cells outside the central core and the width of xylem, correlated negatively with sugar content and positively with root yield. This suggests that these parameters can be used in preliminary selection of sugar-beet breeding material. Introducing such criteria into the breeding process could speed up the selection and reduce the number of expensive field trials.
The aim of this study was to assess the influence of mineral NPK, Mg and micronutrient fertilisation on the content of macroelements and root yield of a sugar beet cultivar called Khazar. The effects of three fertilisation levels were assessed. Additionally, the highest NPK dose was analysed in treatments with NPK + Mg and micronutrients (B, Cu, Zn, Mn). The increasing level of NPK fertilisation as well as the nutrition with magnesium and micronutrients caused an increase in root yield. The highest yield of roots was achieved by beet plants fertilised with the high NPK dose combined with magnesium, boron, copper and zinc. It was demonstrated that roots fertilised with the 3NPK dose and magnesium tended to accumulate more N-total. At the same time, the applied micronutrients contributed to a decline in the N-total content of dry matter in roots. The analysed fertilisation with NPK and micronutrients did not affect the content of phosphorus, potassium and calcium in either of the two beet organs. In general, beet leaves were characterised by higher concentrations of nutrients than roots.
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.