Effect of sowing time on the once-over harvest yield of broccoli cultivars in north-west Tasmania

1986 ◽  
Vol 26 (4) ◽  
pp. 497
Author(s):  
B Chung ◽  
HL Strickland

The effect of sowing times between November and May on the maturity and once-over harvest yield of broccoli (Brassica oleracea L. var. italica Plenck) was studied on the north-west coast of Tasmania. Sowing times between November and January had little effect on the plant size and marketable spear yield of the cultivar Futura. However, delaying sowing from January to March reduced the plant size and marketable spear yield of 10 cultivars of different maturity types. The length of the growing period of all cultivars was increased for sowings after February. A continuous production of broccoli for once-over harvest can be maintained for March-August by a combination of cultivars and sowings from January to March. However, yields of less than 5 t/ha can be expected for the mid-May-August harvests compared with yields in excess of 10 t/ha for March and April harvests.

Author(s):  
А.М. Артемьева

Листовая капуста, объединяющая две группы разновидностей в составе вида капуста огородная (Brassica oleracea L.), имеет многоцелевое использование: в качестве ценного сочного корма для всех видов сельскохозяйственных животных и птицы, а также пищевое и декоративное. Широкое генетическое разнообразие культуры структурировано в 18 агроэкологических сортотипов. В последние годы культура в качестве кормовой незаслуженно забыта в России. Настоящая статья посвящена изучению хозяйственно ценных признаков 46 образцов листовой капусты из мировой коллекции генетических ресурсов ВИР им. Н. И. Вавилова при выращивании в Северо-Западном регионе РФ (г. Пушкин) в 2014–2020 годах. Установлены источники признаков продуктивности (массы растения, доли, высоты и диаметра стеблей, числа листьев, ветвистости): Schnitt Gelber Butter, Максилла, Lacta, Col Forrajera, местный сорт Черногории к-384 (урожайность 132–180 т/га при размещении 30 тыс. растений на 1 га). Выявлена устойчивость или высокая толерантность изученных сортообразцов листовой капусты к поражению болезнями (килой, пероноспорозом, альтернариозом, сосудистым бактериозом). Установлено, что к листогрызущим вредителям (капустной моли и капустной совке, а также к капустной мухе) устойчивы главным образом курчаволистные сорта различного происхождения и местные плосколистные сорта из Испании и Абхазии. Выделены источники высокого содержания аскорбиновой кислоты и пигментов (хлорофиллов, каротиноидов, антоцианов): главным образом местные и тёмноокрашенные сорта, включая сорт пальмовидной капусты с тёмно-зелёными листьями и гибрид листовой и брюссельской капусты с тёмно-фиолетовыми листьями. По комплексу ценных признаков выделены старый российский сорт Мозговая синяя сиверская, испанский местный сорт Berza alta, немецкий курчаволистный сорт Gruner halbhoher. Кормовая капуста заслуживает возвращения в рацион животных и, соответственно, расширения площадей её возделывания в РФ. Brassica oleracea L. convar. acephala (DC.) Alef. and B. oleracea L. convar. fruticosa (Metzg.) Alef. can be used as a valuable fresh forage for livestock and poultry, food or ornamental plants. High genetic diversity of these crops is represented by 18 genotypes adapted to various environments. Unfortunately, over the last years these plants were not used in livestock feeding. The report deals with economically important traits of 46 kale genotypes obtained from the N. I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR). The crop was cultivated in the north-west of Russia (Pushkin) in 2014–2020. Such genotypes as Schnitt Gelber Butter, “Maksilla”, Lacta, Col Forrajera, and k-384 had the best characteristics (plant mass, proportion, height and diameter of stems, leaf number and lateral development), leading to productivity of 132–180 t ha-1 when seeding 30 thousand plants per 1 ha). Genotypes showed high resistance to various diseases (clubroot, mildew, Alternaria leaf spot, black rot). Curly kale as well as genotypes from Spain and Abkhazia had high tolerance to diamondback moth, cabbage moth, and cabbage fly. The sources of high content of ascorbic acid, chlorophylls, carotenoids, and anthocyanins were identified: mainly local dark-colored varieties. “Mozgovaya sinyaya siverskaya”, Berza alta, Gruner halbhoher had a number of economically important traits. Kale is recommended for livestock feeding, and therefore the area of its cultivation should be increased in Russia.


2005 ◽  
Vol 84 (2) ◽  
pp. 149-165 ◽  
Author(s):  
Martin Rorke

This paper uses customs figures to show that herring exports from the east and west coast lowlands expanded significantly in the last six decades of the sixteenth century. The paper argues that the rise was primarily due to the north-west Highland fisheries being opened up and exploited by east and west coast burghs. These ventures required greater capital supplies and more complex organisation than their local inshore fisheries and they were often interrupted by political hostilities. However, the costs were a fraction of those required to establish a deepwater buss fleet, enabling Scotland to expand production and take advantage of European demand for fish while minimising additional capital costs.


2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Otman EL Mountassir ◽  
Mohammed Bahir ◽  
Driss Ouazar ◽  
Abdelghani Chehbouni ◽  
Paula M. Carreira

AbstractThe city of Essaouira is located along the north-west coast of Morocco, where groundwater is the main source of drinking, domestic and agricultural water. In recent decades, the salinity of groundwater has increased, which is why geochemical techniques and environmental isotopes have been used to determine the main sources of groundwater recharge and salinization. The hydrochemical study shows that for the years 1995, 2007, 2016 and 2019, the chemical composition of groundwater in the study area consists of HCO3–Ca–Mg, Cl–Ca–Mg, SO4–Ca and Cl–Na chemical facies. The results show that from 1995 to 2019, electrical conductivity increased and that could be explained by a decrease in annual rainfall in relation to climate change and water–rock interaction processes. Geochemical and environmental isotope data show that the main geochemical mechanisms controlling the hydrochemical evolution of groundwater in the Cenomanian–Turonian aquifer are the water–rock interaction and the cation exchange process. The diagram of δ2H = 8 * δ18O + 10 shows that the isotopic contents are close or above to the Global Meteoric Water Line, which suggests that the aquifer is recharged by precipitation of Atlantic origin. In conclusion, groundwater withdrawal should be well controlled to prevent groundwater salinization and further intrusion of seawater due to the lack of annual groundwater recharge in the Essaouira region.


2018 ◽  
Vol 24 (2) ◽  
pp. 1382-1387 ◽  
Author(s):  
Syaifulnizam Abd Manaf ◽  
Norwati Mustapha ◽  
Md. Nasir Sulaiman ◽  
Nor Azura Husin ◽  
Mohd Radzi Abdul Hamid

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