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The study is a comparison of effects produced by boron fertilization applied to spring barley and oats, grown on light soil, low in available boron, in relation to the application method (pre-sowing, top dressing, foliar applications) and rates of the element. The study was carried out as a three-year series of one-year, two-factor strict field trials (the splitplot design). It has been demonstrated that top dressing with boron applied to soil at the tillering stage as well as foliar fertilization during the stem elongation stage can significantly improve yields. Grain of both cereals from the control plots showed symptoms of insufficient boron nutrition, which were absent when boron fertilization had been applied. Presowing fertilization, although not affecting the yields, improved the supply of grain with boron. Differences between the cereal species were found in terms of boron concentrations in vegetative organs of the cereals and in their response to higher availability of this nutrient. Compared to spring barley, oats was characterised by a much higher content of boron in vegetative parts and was more responsive to increased concentrations of boron in soil.
Three one-year, two-factor field experiments were performed in the years 2003-2005. The trails were established in a split plot design in sandy (light loamy sand), acidic soil, low in boron soluble in 1 mol HCl∙dm-3. The effect of boron fertilization on yield and boron supply of five hybrid maize cultivars was tested. The economic profitability of boron fertilization was assessed. Boron fertilization significantly increased the yields of maize grain. The increases fluctuated within the range of 3.9% do 32.7% relative to the control yield, depending on the maize cultivar and boron dose applied. The cultivars Limko (up to 6.94 t∙ha-1) and Cyrkon (up to 7.25 t∙ha-1) produced the highest yields. Boron fertilization did not increase the concentration of this element in grain to the reference level. The rate of 2 kg B∙ha-1 proved to be the most efficient economically as it guaranteed the average, for cultivars, increase of grain yield 21.3% relative to the control yield and the profit of 401 Polish zloty per 1 hectare.
Effects of two doses of nitrogen (0.6 and 0.9 g N·pot⁻¹) in combination with foliar application of boron (10 mg B·pot⁻¹) and two levels of P and K were studied in a pot experiment with poppy plants (Papaver somniferum L.). After the application of boron, a marked increase of its concentration in plants (112-126 mg·kg⁻¹) was observed. As compared to variants without boron, higher B concentrations were found in variants with the supply of this element within the whole course of growing season. Concentration of nitrogen decreased boron content during growing season due to a dilution effect. However, there were no grater differences among individual variants. In combination with increased levels of N, P, K, the application of B on leaves increased the seed yield by 6.4% and decreased production of straw by 6.7% as compared to controls without supply of this element. This fact was manifested also in the narrowest straw/seeds ratio. The volume of one capsule ranged in individual variants from 13.1 to 16.6 ml per plant but without any direct dependence on seed yield. The application of boron was manifested only in combination with increased levels of N, P, K. Concentrations of morphine in straw (empty heads + 15 cm of stem) increased with the increasing supply of nitrogen from 0.40 to 0.49%. The effect of boron supply was not marked too much.
The aim of the study was to examine response of ‘Jersey’ highbush blueberry to boron (B) fertilization. The experiment was carried out in 2002-2003 at a private plantation in Central Poland on mature blueberries planted on a sandy loam soil with pH 4.1, low organic matter status, and medium available B content. Blueberries were supplied with B by foliar applications or broadcasting. Foliar B sprays were done in the spring or the fall. Spring B sprays were performed at the beginning of blooming, at petal fall, and 3 and 6 weeks after the ending of flowering. In each spring spray treatment, B was used at a rate of 0.2 kg ha⁻¹. Fall B spray was done 5 weeks after fruit harvest using 0.8 kg B ha⁻¹. Soil B was applied at the stage of bud break at a rate of 2 kg ha⁻¹. Blueberries unfertilized with B served as control. The results showed that soil B application and spring B sprays increased B status in flowers and leaves. However, B fertilization, regardless of application mode, had no effect on plant vigor, the number of flowers per cane, fruit set, mean fruit weight, berry firmness, and yielding. Berries of blueberries sprayed with B in the spring had increased soluble solids concentrations. It is concluded that: (i) B fertilizer requirements of ‘Jersey’ highbush blueberry are low, and (ii) at hot water extractable B concentration in a soil below 0.37 mg kg⁻¹ and/or at B status in leaves of current season shoots below 37 mg kg⁻¹, spring B sprays should be applied in blueberry culture to increase soluble solids concentration in fruit.
Over 1999-2001 three two-factorial strict field experiments were carried out to evaluate the applicability of soil boron test (1 mole HClˇdm-3) to determine boron fertilisation requirements of oat. Three boron application methods (pre-sowing, top-dressing and foliar fertilisation) were the variants of the first factor while four doses of boron constituted the second factor. The optimal oat boron supply in B-deficient soil is noted in the study. Despite an over-optimal boron concentration in plants, fertilisation with the microelement brings statistically significant increases in oat grain yield and a continuous increase in B content in plant tissues. The results call for a verification of the tests of boron concentration in soil (1 mole HClˇdm-3) and oat plants and reveal the advantage of boron top-dressing and foliar methods in yield-enhancement. Considering the impact of boron application on yield and its chemical composition as well as the level of nutrie.
A three-year-lasting field experiment involved investigation on the effect of nitrogen and boron fertilization: 80, 120, 160 kg N∙ha-1; 80 N + 2 kg B, 120 N + B, 160 N + B kg∙ha-1 on fat and protein yield, as well as energy value of spring rape seeds. The experiment was conducted on brown and grey-brown podsolic soil of slight acidity. The experiment followed a „split-plot” method, with two variables introduced. The first examined factor was the population cultivars Heros and Hunter and hybrid cultivar Jura. The second factor was nitrogen and boron fertilization. Different humidity conditions in the years of the experiment had a significant effect on the protein and fat yield, as well as energy value of seeds. In 2005 the protein yield obtained from 1 area unit was higher by 32% as compared to 2006 and 2007. In 2005 the obtained fat yield was higher by 209 kg from 1 ha in comparison to the most disadvantageous year 2006. These differences ranged more there 30%. Double - improved cultivar feature were obtained such as considerably higher protein yield (by 29%) and fat (by about 35%) and energy value (by 30%) as compared to crossbreed compound. Fertilization with the dose of 160 kg N∙ha-1, combined with boron, enabled obtaining protein yield per 1 ha higher by about 3% in comparison to the lowest N dose (80 kg N∙ha-1). Average protein and fat yield, at combined nitrogen and boron fertilization, increased by 1.3% and 1.6% respectively. Considering the interaction of the examined factors (cultivar x fertilization) the most advantageous effect of the fertilization dose 160 kg N∙ha-1 + B on crude fat and total protein yield, as well as grain yield and energy value occurred in the case of the population cultivar Heros in comparison to the hybrid cultivar Jura.
The study focused on the effects of foliar fertilization with boron applied to spring wheat grown on sandy soil, low in available boron, under the conditions of simulated drought stress and the soil pH modified by liming. The study involved pot trials set up in a greenhouse. Wagner’s pots, each containing 6 kg of light soil, served as experimental units. It was demonstrated that foliar application of boron was effective in mollifying the unfavourable wheat growth and nutrients uptake conditions (drought and soil reaction change). The fertilization alleviated the results of the limited availability of boron, significantly increasing the grain and straw yield mass and enriching the yields with boron. The highest rates of boron used for foliar application (7 and 9 cm3 0.3% H3BO3⋅pot-1) raised the concentration of this element in wheat grain up to a level comparable to the reference data.
Aim of this work was to examine effect of boron fertilization on yield of apple trees and fruit quality. The experiment was carried out during 1994-1996 in Dąbrowice Experimental Orchard belonging to Research Institute of Pomology and Floriculture in Skierniewice, on Šampión cultivar, grafted on M26 rootstock. Trees were planted in the autumn of 1991 at the distance 4 x 2.5 m, on sandy-loam soil. Before starting and during carrying out the study there were not visual symptoms of boron deficiency. In the experiment applied boron fertilization to the soil at the dose 2 g B per tree or three times boron sprays before or after bloom at the dose 0,67 g B per tree. Apple trees without any boron fertilization were served as a control. Results of experiment showed that only boron sprays after bloom increased fruit set and yield. There were no significant differences between treatments in fruit maturity at harvest, fruit weight losses during storage, apple number infected by Penicillium, Monilina and Botrytis cinerea. Boron sprays after bloom increased firmness of apples after storage and decreased sensibility to bitter pit. internal breakdown and Gloeosporium-rot. All boron treatments increased boron concentration in apples in comparison with control ones. However, the highest increase of boron concentration in apples was observed when boron sprays were done after bloom and soil boron application. Only boron sprays applied after bloom increased calcium concentration in apples.
Acta Agrobotanica
|
1998
|
tom 51
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nr 1-2
127-137
The aim of this study was to examine effect of boron (B) fertilization of Šampión apple trees (Malus domestica Borkh.) grafted on M.26 rootstock on uptake and distribution of mineral elements. The trees were planted at a distance of 4.0 x 2.5 m on sandy-loam soil with low hot-water extractable B content. The study was carried out in 1994-1996 in Dąbrowice Experimental Station located near Skierniewice. The following treatments were applied: (i) soil B application at a rate of 2g B tree-1 as Bortrac fertilizer (16% B in form of boric acid); (ii) three times leaf B applications before full bloom at a rate of 0,67g B tree 1 at the stage: green and pink bud and beginning of flowering; (iii) three times leaf B applications after bloom at a rate of 0,67g B tree'1. First spraying was applied at petal fall and next two ones at 2-weeks interval; (iv) control - trees unfertilized with B. The measurements included: soil chemical analysis (contents of available phosphorus (P) and boron (B) and exchange potassium (K), magnesium (Mg), and calcium (Ca) and plant analysis (concentrations of N, P. K, Mg, Ca and B in the spur leaves, the leaves from one- year-old shoots and the apple flesh). It was shown that B fertilization had not effect on N uptake and its distribution within apple tree. It was found that soil B application stimulated P uptake which increased concentration of this element in the spur leaves, the leaves from current shoots and the apple flesh. Boron sprayings after bloom increased Ca uptake which rised Ca concentration in studied plant parts. Additionally, leaf B application after bloom reduced plant Mg uptake. As a result of B sprayings after bloom, K concentration was increased in the spur leaves and decreased in the apple flesh. Boron spraying before bloom was less effective in increasing this microelement in plant than leaf B applications after bloom and soil B application.
Samples of plants of red clover cv. Dajana were collected from a strict field experi-ment carried out in 2005-2006. Two factors were considered: 1. Seeds originating from plantation of red clover, foliar fed with boron and molybdenum at the following rates: 0; B – 0.3; Mo – 0.01; B – 0.3 + Mo – 0.01; B – 0.45; Mo – 0.015; B – 0.45 + Mo – 0.015 kg ha-1; 2. Two cuts of red clover. A con-sequential impact of feeding the seed red clover with boron and molybdenum was observed; it consid-erably diversified the contents of N, P, K, Ca, Mg, specific protein, crude fibre, NDF, ADF, and micro-elements (B, Cu, Mn, Mo) in the plants. Better effects were most often recorded for seeds fed at the following rates: B – 0.45; Mo – 0.015, and B – 0.45 + Mo – 0.015 kg ha-1. Great variability of above components and zinc in the plants resulted from the weather during particular seasons. From the point of view of red clover as a fodder, better results were noted for plants from 2006 and from the 2nd cut.
W latach 2005-2006 przeprowadzono laboratoryjną ocenę wartości siewnej nasion koniczyny czerwonej – łąkowej, odmiany Dajana. Eksperyment prowadzono metodą kompletnej randomizacji w czterech powtórzeniach. W badaniach uwzględniono dwa czynniki: 1. dolistne dokarmianie borem i molibdenem nasiennej koniczyny czerwonej w następujących dawkach: 0; B-0,3; Mo-0,01; B-0,3 + Mo-0,01; B-0,45; Mo-0,015; B-0,45 + Mo-0,015 kg·ha-1; 2. naświetlanie nasion przed kiełkowaniem rozbieżną wiązką światła lasera He-Ne, o gęstości powierzchniowej mocy 0, 4 i 8 mW·cm-2 (R0, R4, R8), stosowane 1, 2 i 4-krotnie (x1, x2, x4). W materiale siewnym koniczyny czerwonej określono energię kiełkowania, udział nasion normalnie i nienormalnie kiełkujących, twardych, porażonych chorobami grzybowymi oraz ich zdolność kiełkowania. Stwierdzono, że bor w dawce 0,3 kg·ha-1 oraz molibden w dawce 0,01 i 0,015 kg·ha-1 istotnie zwiększały energię i zdolność kiełkowania koniczyny oraz udział nasion normalnie kiełkujących, a zmniejszały - nienormalnie kiełkujących. Molibden, niezależnie od dawki, obniżał udział nasion porażonych chorobami grzybowymi, bor nie miał wpływu na tą cechę, natomiast łączne stosowanie boru z molibdenem zwiększało ich udział. Stymulacja nasion laserem, głównie w wyższej dawce, istotnie zwiększała energię kiełkowania koniczyny czerwonej i udział nasion normalnie kiełkujących oraz obniżała udział nasion twardych, natomiast nie różnicowała zdolności kiełkowania.
W latach 2004-2006 prowadzono jednoczynnikowe doświadczenia mikropoletkowe w Stacji Badawczej w Wierzchucinku należącej do Uniwersytetu Technologiczno-Przyrodniczego w Bydgoszczy. Celem badań była ocena wpływu nawożenia pojedynczymi mikroelementami (Mn, B, Mo, Cu i Zn) na kształtowanie się zawartości siarki ogólnej, siarczanowej (VI) i organicznej w nasionach oraz w słomie fasoli zwyczajnej odmiany Aura. Mikroelementy w formie schelatowanej zastosowano dolistnie w postaci serii nawozów ‘Symfonia’. Przeprowadzone badania wykazały, że pierwiastkiem, który spowodował największą w porównaniu z obiektem kontrolnym, kumulację siarki ogólnej w nasionach i w słomie fasoli, a także siarki siarczanowej (VI) w nasionach, był cynk. Stosunkowo dużą rolę w kształtowaniu zawartości różnych form siarki w plonie fasoli odgrywały również miedź i molibden. Mangan i bor były jedynymi mikroelementami, które nie różnicowały istotnie zawartości badanych form siarki w plonie fasoli w stosunku do obiektu, na którym nie stosowano nawożenia tymi składnikami.
W latach 2006-2009 przeprowadzono badania z tetraploidalną koniczyną czerwoną, odmiany ‘Terenia’, uprawianą na nasiona. W eksperymencie uwzględniono dwa czynniki: 1. przedsiewną stymulację nasion laserem He-Ne, o gęstości powierzchniowej mocy 4 i 8 mW·cm-2, stosowaną 1- i 3- krotnie. 2. dokarmianie roślin w fazie pąkowania z drugiego pokosu borem i molibdenem (0; 0,15 B + 0,01 Mo; 0,30 B + 0,02 Mo; 0,45 B + 0,03 Mo kg·ha-1). Koniczynę uprawiano w cyklu 4-letnim. Największy wpływ na plony nasion miały warunki meteorologiczne, kiedy to okres wegetacji wynosił 104 dni, średnia temperatura powietrza 18,4oC, a suma opadów 233,6mm. Plony nasion tetraploidalnej koniczyny czerwonej wahały się od 485 (2008 r.) do 692 kg·ha-1 (2007). Już najniższa dawka mikroelementów (B – 0,15 i Mo – 0,01 kg·ha-1) istotnie zwiększała liczbę nasion w główce i procent ich osadzenia oraz plony zebrane i potencjalne. Wyższe dawki boru i molibdenu, w porównaniu z najniższą, nie spowodowały uzasadnionych statystycznie różnic w plonach nasion i wymienionych elementach ich struktury. Przedsiewna stymulacja nasion światłem lasera istotnie zwiększała tylko liczbę roślin na 1 m2 po wschodach oraz plony zielonej i suchej masy ściernianki. W sprzyjających warunkach pogodowych możliwa jest uprawa tetraploidalnej koniczyny czerwonej na nasiona w czteroletnim cyklu (I rok: wsiewka w jęczmień jary – zbiór ziarna jęczmienia i ściernianki; II, III, IV rok: zbiór pierwszego pokosu na paszę, a drugiego na nasiona).
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.
In the years 2007–2009 field experiments with maize were carried out under reduced tillage. Brown soils were boron deficient and medium affluent in available zinc. The mixture of mezotrione and rimsulfuron was applied in experiments with split dose method (½ dose at 3 leaf stage and ½ dose at 8 leaf stage) in conjunction with micronutrient fertilizers in the form of chelate boron and zinc compounds (Insol B and Insol Zn). The possibility of joint application of mezotrione and rimsulfuron mixture with Insol B and Insol Zn was stated. The high efficiency of the mixture in reducing the mono and dicotyledonous weed species was also proved. This allowed obtaining high maize grain yields, containing more boron and zinc as well as more high quality protein and starch in comparison with both variants – untreated with herbicides and untreated with the micronutrients.
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