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Changes in production methods of Ericaceae ornamental plants could have caused them to become more vulnerable to weak pathogens. The aim of this study was to investigate the casual agent of Ericaceous plant damage. Plants and peat substrate were collected from two nurseries near Poznań. After isolation on agar medium and fulfilling Koch postulates it was found that the casual agent of Ericaceae ornamentalplant damage was Pestalotiopsis sydowiana (Bresadole) B.C. Sutton, a new species noted in Poland.
Cultivation machines meet resistance during their operation. Mostly the magnitude of resistance depends on resistance caused by tilled material. This study presents the results of the measurements of working resistance for a disc harrow U-239 manufactured by Akpil and a seedbed former and a cultivator with a string roller manufactured by Egedal. The tests were conducted on open tree nursery in Kłaj, being part of the Forest District of Niepołomice. Sandy-loam and loam-sandy soils prevail in the nursery. The measurements of resistance were conducted in three quarters with black fallow. The compactness and humidity of soil were determined (16-24%). Working resistance was determined by the hauling method with the usage of force strain gauge. The average value of working resistance for the disc harrow fit in the range between 2.25 kN and 2.82 kN, for the seedbed former between 2.35 kN and 2.53 kN, for the cultivator with string roller between 1.50 kN and 2.37 kN.
Background. Rational nutrition of infants and toddlers is essential for their normal growth and development, and for the development of proper nutritional habits. It should be preceded by proper planning. Objective. The aim of the study was to evaluate of the planning and organization of nutrition in nurseries. Material and methods. In the research conducted within the program “Eating healthy, growing healthy” (EHGH), 128 crèches from all over Poland participated. The nurseries were attended by 8182 children under the age of 3. The research was carried out between 2015 and 2016. Data on the organization and quality of nutrition were collected through direct interviews with directors and / or staff responsible for feeding in crèches. In addition, analysis of the decade’s menu of the participating institutions (128 menus) and daily inventory reports (1280 documents) were analyzed. The data were analyzed for the total number and the type (public and non-public) of institution. The program Statistica Version 13.1 was used. Results. Half of the surveyed DCCs planned in the menu whole grains, nearly all of them served fresh vegetables and fruits to the children, and every third added them to every meal. The most common drink during the meal was compote. Access to water between meals was offered to children in majority of the DCCs. The quality of diet was differentiated by the type of nursery: depending on the type (public vs non-public), the differences in salting and sweetening meals have been shown. Public DCCs had a much lower average amount of money allocated per day to feed a child compared to non-public, most of these managed own kitchens and did not employ a dietitian. Despite the higher nutritional rates in non-public crèches, some errors in nutrition planning have been observed. Conclusions. Higher average amount of money allocated per day to feed a child in non-public nurseries did not provide adequate nutrition. There is a need to publish standardized, understandable and practical recommendations in nutrition of children in nurseries. Adopting such recommendations in daily practice in all public and non-public crèches should improve the nutrition of children.
The experiment was conducted at the Experimental Station of the University of Life Sciences in Poznań, in the years 2005–2007. The aim of this study was to estimate the influence of a mycorrhizal vaccine on the growth of maiden sweet cherry trees of four cultivars: ‘Burlat’, ‘Regina’, ‘Summit’ and ‘Vanda’. Results of the study proved that the mycorrhizal vaccine did not have significant effect on any of studied parameters of maiden sweet cherry trees growth. Budded cultivars of sweet cherry differentiated the percentage of obtained maiden trees and their branching. The highest percentage of maiden trees was obtained for ‘Regina’ cultivar and the lowest one was observed for ‘Burlat’. Maiden trees of ‘Summit’ cultivar were characterized by much lower susceptibility to creating lateral shoots comparing with other cultivars taken into consideration. Significantly lower value of chlorophyll content was observed in leaves of ‘Summit’ cultivar.
The measurements have been performed in the nursery in the years 2007–2013 to study differences in size and correlations between selected growth factors in “knipboom” trees of 6 apple cultivars on M.9 rootstock. The trees of ‘Jonagold Decosta’ (‘Red Jonaprince’ in 2013) and ‘Fuji Beni Shogun’ showed the strongest growth, ‘Šampion’ and ‘Camspur’ the weakest one, whereas ‘Gala Must’ and ‘Golden Delicious Reinders’ were characterized by moderate vigor. Mean length of one feather increased from the tree top towards its base, but did not depend significantly on the number of laterals per tree. Correlations between growth factors were similar to those found in maiden apple trees and the closest ones were between total length of lateral shoots and their number on the tree. A trunk diameter had stronger correlations with other growth parameters than tree height.
The experiment was established at Felin Experimental Farm of Lublin Agricultural University. The aim of this study was to estimate the growth and the branched of the six stocks used in the production of the cherry and the sweet cherry young trees. Results of the study proved that F 12/1 and Colt stocks were the most vigorous, while P-HL 6 and P-HL 84 were characterised by the weakest growth. The best branched was by mahaleb cherry seedlings and P-HL 84 stock. The greatest precentage of cut off the buds of the cherry cv. ‘Łutówka’ proved on the rootstocks: F 12/1, P-HL 84 and P-HL 6.
The studies were conducted in a nursery of sour cherry ‘Łutówka’ budded on Prunus mahaleb L. in the years 1993, 2000–2003, and 2013. The height of trees, the diameter of stems, and the length of lateral shoots were measured. The air temperature and precipitation higher than the long-term mean (by approximately 10 % and 28%, respectively) contributed to the increase in the stem diameter, the total length of shoots, and the number of shoots per tree. The length of lateral shoots increased from the top of the crown towards the lower parts, however, the number of feathers per tree and the mean length of shoots decreased. A strong positive relationship (r = 0.74, P < 0.05) was revealed between the stem diameter and the total length of shoots. Generally, the correlations between the type of growth of sour cherry maiden trees and morphological traits were similar to those characteristic for apple maiden trees or “knip-boom” type trees.
Phytophthora citrophthora was isolated from grafted lilac (Syringa vulgaris). Showing browning of leaf blade edge and necrosis spreading on all leaves. On the stem bases, beginning from the grafted place, necrosis had even spread 20 cm upward, whereas root stock shoots and roots were healthy. Using rhododendron leaves as the bait, Phytophthora citrophthora was isolated from soil where growing plants showed stem base rot symptoms. Isolates of Phytophthora which were from the stem base, shoot tip of lilac, and soil, colonized leaves, stem parts and roots of lilac. Necroses spread about twice faster on leaf blades than on stem parts. Three isolates of Phytophthora colonized also Forsythia intermedia and Ligustrum vulgare.
In many strawberry production areas, traditional bare-root transplants are being replaced by plug plants produced from runners. Tips (unrooted runners) are rooted into trays filled with various substrates. The success of rooting depends on various factors such as cultivar, growing medium, air humidity. The objective of this study was to evaluate the efficiency of soilless nursery to produce strawberry potted planting material. ‘Elsanta’, ’Grandarosa’ and ‘Pink Rosa’ mother plants were planted in containers and set on a special rack in the greenhouse. Emerging plantlets were clipped with metal clips in micro-pots filled with peat or coconut substrate and detached from the mother plants after 14 days. Efficiency of the nursery and quality of obtained plantlets were evaluated. Efficiency of the nursery depended on the number of runners emerging from the mother plants and the number of plantlets on the runners. The highest number of plantlets was obtained from ‘Grandarosa’ (29.3), followed by ‘Pink Rosa’ (23.1), and ‘Elsanta’ (19.5). Rooting of plantlets before detaching them from the mother plants caused all plantlets were properly rooted. Growing media used in the experiment did not have significant influence on the plantlet rooting. The greenhouse soilless system for production of strawberry potted plantlets offers an important alternative to the conventional field grown plantlets.
Research over a three year period indicated that P. ramorum occurred rarely in Poland on Rhododendron spp., in spite of established monitoring in nurseries, trade stands, forest and water from early spring to late autumn each year. The pathogen was not found in forests on Vaccinium vitisidaea, Calluna vulgaris, Fagus sylvatica and Quercus rubra, proving its limited spread. The species was detected, however, from 2 rivers. P. citricola was isolated from most of surveyed plants. Besides this P. cactorum, P. cinnamomi, P.citrophthora and P. nicotianae var. nicotianae were isolated from diseased plants. Additionally Pestalotia sydowiana, species of Fusarium, Botrytis cinerea and Trichoderma were often found in diseased plant tissues. Laboratory and glasshouse research showed slight differences in colonization of plants by P. ramorum and P. citricola. However, taking into account the range of host plants, and frequency of pathogen occurrence in infected plant material and water, it became clear that P. citricola poses a much greater danger than P. ramorum to the natural environment in Poland.
The aim of the study was to evaluate the usefulness of glassy fertilizer as a slow-release fertilizer in container cultivation of Taxus × media and Physocarpus opulifolius in comparison with a common Osmocote Exact fertilizer used in nurseries. Glassy fertilizer granulated to Ø> 0.3 mm and Ø< 0.3 mm was applied in two doses: 3 and 6 g·dm-3. Macroelements, pH and EC were analysed for their content in the substrate. The total length of yew annual shoots was determined. Ninebark was measured for height and number of offshoots; it was also subject to quality classification. Osmocote Exact and coarsely-granulated glassy fertilizer showed systematic release of nutrients. The greatest length of annual shoots was marked on yews fertilized with Osmocote Exact and 3 g VitroFosMaK granulated to Ø< 0.3 mm per 1 dm3 of the substrate. Ninebarks fertilized with glassy fertilizer granulated to Ø< 0.3 mm in the dose of 6 g.dm-3 of the substrate showed the greatest number of offshoots. The most valuable commercial material was obtained when the plants were fertilized with 6 g VitroFosMaK.dm-3 of the substrate.
Indigenous mycorrhizal colonisation of one (1/0) and two (2/0) year old Scots pine (Pinus sylvestris L.) seedlings from forest nurseries situated in the north-west part of Poland was investigated. Seedlings were fertilized after a schedule designed to satisfy their requirements which resulted from soil analysis of each nursery. In autumn needle nitrogen concentration and mycorrhizal status were estimated. As a rule seedlings 1/0 obtained high doses of fertilizers, and their needle nitrogen concentration highly exceeded the recommended optimal level above which mycorrhiza formation is greatly restricted. Highly negative correlation was found between the nitrogen status of foliage and mycorrhizal quantitative and qualitative colonisation estimated in the abundance class of 0-5. When internal nitrogen level was low, several ectomycorrhizal morphotypes were found on roots of tested plants. Excessive nitrogen fertilization decreased root ramification pattern and along with increased pH promoted ectendomycorrhizal symbiosis. Two-year-old seedlings (2/0) were characterised by significantly lower nitrogen concentration in the needles which resulted in much higher ectomycorrhizal colonisation. Ectendomycorrhizal symbiosis in the case of 2/0 seedlings was scarce. The results indicate that natural colonisation in nurseries is dependent on the soil management practices, especially nitrogen fertilization. Optimalization of nitrogen fertilization may intensify ectomycorrhizal colonisation of the nursery stock from indigenous fungal species and improve the growth of Scots pine seedlings in bare-root nurseries and plantations.
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