A STUDY OF VARIATION IN FRUIT YIELD AND RELATED CHARACTERS IN TWO DIALLELS OF THE LOWBUSH BLUEBERRY, VACCINIUM ANGUSTIFOLIUM AIT.

1975 ◽  
Vol 17 (3) ◽  
pp. 401-404 ◽  
Author(s):  
Lewis E. Aalders ◽  
Ivan V. Hall
Keyword(s):  
Fruit Weight ◽  
Fruit Yield ◽  
Ripe Fruit ◽  
Vaccinium Angustifolium ◽  
Plant Vigor ◽  
Lowbush Blueberry

Two diallels, one involving 5 parents and a second involving 8 parents were evaluated for 3 years each. In the 5-parent diallel, date of harvest, yield of ripe fruit, weight per berry, and area covered by one plant were evaluated. Of these, weight per berry had by far the greatest genetic and additive components of variation whereas these components for yield were very low. In the 8-parent diallel, the same variables were evaluated with the addition of berry color, plant vigor and log number of berries. Weight per berry and berry color had large genetic and additive components whereas yield of ripe fruit, plant vigor and log number of berries had large environmental components of variation.

Herbicidal weed control and crop-year NPK fertilization improves lowbush blueberry (Vaccinium angustifolium Ait.) production

2000 ◽  
Vol 80 (2) ◽  
pp. 351-361 ◽  
Author(s):  
B. G. Penney ◽  
K. B. Mcrae
Keyword(s):  
Key Words ◽  
Weed Control ◽  
Past Research ◽  
Fruit Yield ◽  
Ripe Fruit ◽  
Flower Buds ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry ◽  
Fruit Abortion ◽  
Npk Fertilization

Past research has shown that fertilizer applied in the vegetative year can increase yield, but not always. Fertilizer applied in the crop year without weed control also has been shown to increase yield. The present study, conducted on a natural lowbush blueberry stand for 8 yr, compared the effects of factorial combinations of two rates each of N (0, 60), P (0, 26), and K (0, 50 kg ha−1) applied either in the vegetative or crop year, with or without weed control. Greatest production was obtained with weed control, which increased ripe fruit yield by 247% over that from plots without weed control. Nitrogen alone or P and K with N also increased yield, but only when applied in the crop year to weed-controlled plots. Phosphorous or K alone was of little benefit. Nitrogen increased ripe fruit yield from 3910 (unfertilized plots with weed control) to 4440 kg ha−1 and in combination with P and K to 5520 kg ha−1. Yield increases from weed control and N were due to increased berry weight and hastened maturity, but weed control also increased total berry number. The increase by P and K was due to an increase in total and ripe berry numbers. Nitrogen applied in the vegetative year, although producing more flower buds m−2 than when applied in the crop year, gave lower yields. Fruit abortion, due to insufficient nutrients in the crop year, particularly N, is suspected to be the reason for the reduced yield. Key words: Lowbush blueberry, Vaccinium angustifolium, yield flower buds, weed control, fertilizer, herbicide

SELECTION OF AN "OPTIMUM" TIME TO HARVEST LOWBUSH BLUEBERRY FRUIT

1972 ◽  
Vol 52 (5) ◽  
pp. 701-705
Author(s):  
L. E. AALDERS ◽  
R. STARK ◽  
I. V. HALL ◽  
L. P. JACKSON ◽  
B. G. PENNEY ◽  
...  
Keyword(s):  
Total Yield ◽  
Ripe Fruit ◽  
Optimum Time ◽  
Vaccinium Angustifolium ◽  
Cumberland County ◽  
Green Fruit ◽  
Lowbush Blueberry ◽  
Maturity Date ◽  
Processed Products ◽  
Selection Of

A field study at Nappan, Cumberland County, Nova Scotia, was conducted over a 3-year period, 1969–71, to determine the optimum date of harvest for the lowbush blueberry (Vaccinium angustifolium Ait.). For each of the 3 years, from 70 to 80% of the fruits were ripe by August 10 and by August 30 more than 90% were ripe. The data obtained suggest that the total yield by number of ripe fruit would not appreciably be reduced, particularly in years with above-normal heat units, by advancing the season approximately 5 days earlier than has normally been done. Earlier picked fruit has tougher skin that would result in a greater number of whole fruits in processed products. Raking early would increase the percentage of green fruit and therefore increase cleaning costs slightly. Data were also collected during the years 1953–71 at Avondale, Newfoundland. These show a great variation between years in the maturity date of the fruit, but 80% are usually ripe in that province by mid-September.

Second-crop N fertilization improves lowbush blueberry (Vaccinium angustifolium Ait.) production

2003 ◽  
Vol 83 (1) ◽  
pp. 149-155 ◽  
Author(s):  
B. G. Penney ◽  
K. B. McRae ◽  
G. A. Bishop
Keyword(s):  
Key Words ◽  
Crop Yield ◽  
Crop Production ◽  
N Fertilization ◽  
Ripe Fruit ◽  
Flower Buds ◽  
Vaccinium Angustifolium ◽  
Potassium Nutrition ◽  
Lowbush Blueberry ◽  
Fruit Abortion

Most commercial blueberry growers follow a 2-yr pruning cycle because second-crop yield in a 3-yr cycle is usually too low for an economical harvest. Research was conducted to determine the extent to which second-crop production could be increased by applying fertilizer in the second-crop year. Treatments, consisting of factorial combinations of N (0, 60 kg ha-1), P (0, 26 kg ha-1), and K (0, 50 kg ha-1), were studied over two 3-yr burn-pruning cycles on a natural lowbush blueberry stand. Treatments were applied prior to, or shortly after, flower buds started to swell in the spring of the second-crop year. Nitrogen increased ripe fruit yield by 65% (3410 vs. 2070 kg ha-1) when compared with plots not previously fertilized with N, and by 43% (3410 vs. 2380 kg ha-1) when compared with plots previously fertilized with N. These results indicate that N might make the second crop economical to harvest. Phosphorus did not significantly affect yield, but K applied in combination with N in the second-crop year negatively affected production and Mg uptake. The increase in yield by N was due to more ripe berries resulting from a higher total (ripe + unripe) number of berries and hastened maturity that increased the percentage of ripe fruit. Reduced fruit abortion is suspected to be the reason for higher berry numbers. In contrast, the negative response to K applications with N was due to reduced total berry numbers. Key words: NK interaction, N × K interaction, potassium, nutrition, fertility, fruit abortion

Inhibition of Tulane Virus replication via exposure to lowbush blueberry (Vaccinium angustifolium) fractional components

2017 ◽  
Vol 7 (4) ◽  
pp. 281-289 ◽  
Author(s):  
David F. Bridges ◽  
Anna Breard ◽  
Alison Lacombe ◽  
Don C. Valentine ◽  
Shravani Tadepalli ◽  
...  
Keyword(s):  
Virus Replication ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry ◽  
Tulane Virus

INORGANIC NITROGEN LEVELS AND NITRIFICATION POTENTIAL IN LOWBUSH BLUEBERRY SOILS

1988 ◽  
Vol 68 (1) ◽  
pp. 63-75 ◽  
Author(s):  
LEONARD J. EATON ◽  
DAVID G. PATRIQUIN
Keyword(s):  
Ammonium Nitrate ◽  
Ammonium Sulfate ◽  
Soil Nitrogen ◽  
Plant Uptake ◽  
Inorganic Nitrogen ◽  
Garden Soil ◽  
Laboratory Studies ◽  
Vaccinium Angustifolium ◽  
Nitrogen Levels ◽  
Lowbush Blueberry

Soil ammonium and nitrate in the top 15 cm of soil were monitored after application of ammonium nitrate and ammonium sulfate to plots at 14 PF (previously fertilized) and 12 NF (never fertilized) lowbush blueberry (Vaccinium angustifolium Ait.) stands representing a range of soil types and management histories. Overall, nitrate values in unfertilized and ammonium sulfate plots were higher at PF than at NF sites, suggesting greater nitrification at PF sites. In laboratory incubation studies, nitrification proceeded immediately in soil from a PF site, but only after a 4-wk lag in that from an adjacent NF site. Nitrification rates were low compared to that in a garden soil (pH 6.6). N-Serve inhibited nitrification in both soils. In ammonium nitrate plots, "excess" N values (N values in fertilized plots minus values in unfertilized plots) were higher for PF than for NF sites, suggesting greater immobilization, plant uptake or loss of N at NF sites. There was no evidence, in laboratory studies, of immobilization of added N by soil from either type of site. Rhizome N concentration increased significantly in response to fertilization at an NF site, but not at a PF site. Key words: Blueberry (lowbush), fertilizer and soil nitrogen

Studies on the flowering biology of red sorrel (Rumex acetosella) ramets from lowbush blueberry (Vaccinium angustifolium) fields in Nova Scotia, Canada

Botany ◽  
2015 ◽  
Vol 93 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Scott N. White ◽  
Nathan S. Boyd ◽  
Rene C. Van Acker ◽  
Clarence J. Swanton
Keyword(s):  
Nova Scotia ◽  
Combined Effects ◽  
Perennial Species ◽  
Weed Species ◽  
Vaccinium Angustifolium ◽  
Perennial Weed ◽  
Flowering Response ◽  
Lowbush Blueberry ◽  
Rumex Acetosella

Red sorrel (Rumex acetosella L.) is a ramet-producing herbaceous creeping perennial species commonly found as a weed in commercially managed lowbush blueberry (Vaccinium angustifolium Aiton) fields in Nova Scotia, Canada. Flowering and seed production occur primarily in overwintering ramets of this species, indicating a potential vernalization requirement for flowering. This study was therefore initiated to examine the role of vernalization, photoperiod, and pre-vernalization stimulus on ramet flowering. Red sorrel ramets propagated from creeping roots and seeds collected from established red sorrel populations in lowbush blueberry had an obligate requirement for vernalization to flower. Ramet populations maintained under pre- and post-vernalization photoperiods of 16 h flowered following 12 weeks of vernalization at 4 ± 0.1 °C, whereas those maintained under constant 16, 14, or 8 h photoperiods without vernalization did not flower. Vernalization for 10 weeks maximized, but did not saturate, the flowering response. Pre-vernalization photoperiod affected flowering response, with increased flowering frequency observed in ramet populations exposed to decreasing, rather than constant, photoperiod prior to vernalization. This study represents the first attempt to determine the combined effects of vernalization and photoperiod on red sorrel flowering, and the results provide a benchmark for the future study of flowering and sexual reproduction in this economically important perennial weed species.

Response of lowbush blueberry (Vaccinium angustifolium) to hexazinone applied early in the fruiting year

2002 ◽  
Vol 82 (4) ◽  
pp. 781-783 ◽  
Author(s):  
K. I. N. Jensen ◽  
E. G. Specht
Keyword(s):  
Key Words ◽  
Weed Control ◽  
Corolla Tube ◽  
Growth Stages ◽  
Vaccinium Angustifolium ◽  
Floral Buds ◽  
Perennial Weeds ◽  
Lowbush Blueberry ◽  
Herbaceous Perennial

Spring application of 1.0 kg ha-1 hexazinone to fruiting-year lowbush blueberry no later than the F3 floral stage, when floral buds separate, but before the corolla tube shows white, controlled some common herbaceous perennial weeds without injury to the crop. Key words: Herbicide injury, growth stages, weed control, hexazinone, Vaccinium angustifolium

Long-term effects of herbicide and fertilizers on lowbush blueberry growth and production

1994 ◽  
Vol 74 (2) ◽  
pp. 341-345 ◽  
Author(s):  
Leonard J. Eaton
Keyword(s):  
Reproductive Development ◽  
Fresh Fruit ◽  
Long Term Effects ◽  
Vaccinium Angustifolium ◽  
Nitrogen Levels ◽  
Lowbush Blueberry ◽  
Production Cycles ◽  
Npk Fertilizer ◽  
Vegetative And Reproductive Growth

Effects of herbicide and herbicide-fertilizer combinations on vegetative and reproductive growth of the lowbush blueberry (Vaccinium angustifolium Ait.) were assessed over a 12-yr period (six production cycles). All treatments stimulated stem lengths, fruit buds per stem and fresh fruit yields compared with untreated controls, but only after 3–6 yr. After the second cycle, stem lengths and fruit bud numbers were greater in herbicide + NPK-treated plants than in all others. Fresh fruit yields were variable throughout the study but were higher in herbicide and herbicide + fertilizer plots than in untreated controls after 1982, except in 1988. Nitrogen levels were greater in leaves and rhizomes of plants in all herbicide and herbicide + fertilizer plots than in control plots after 10 yr, whereas phosphorus was higher only in plants fertilized with NPK. These results suggest the lowbush blueberry responds slowly to herbicide and fertilizer applications. Increased vegetative and reproductive development, as well as denser plant stands, resulted from repeated herbicide and fertilizer applications. Fertilizers applied in conjunction with herbicides stimulate vegetative growth (and fruit buds if an NPK fertilizer), but appear to have no consistent effect on fresh fruit yields. Key words:Vaccinium angustifolium, fertilizer, herbicide, fruit buds, yield

scholarly journals Fruit yield of european cranberry (Oxycoccus palustris Pers.) in different plant communities of peatlands (northern Wielkopolska, Poland)

2012 ◽  
Vol 62 (1) ◽  
pp. 97-105 ◽  
Author(s):  
Artur Adamczak ◽  
Maciej Gąbka ◽  
Waldemar Buchwald
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Leaf Size ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Habitat Conditions ◽  
Fruit Number ◽  
Oxycoccus Palustris

The aim of this study was to determine fruit yield of <i>Oxycoccus palustris</i> under the climatic and habitat conditions of northern Wielkopolska (the Greater Poland region), depending on the type of occupied plant community. Total fruit number and fruit weight as well as average cranberry leaf size were determined on 33 plots with an area of 1 m<sup>2</sup>, located on 7 peatlands. On the study areas, European cranberry produced crops from 9.2 up to 242.0 g &#56256;&#56457;&#56256;&#56323; m<sup>-2</sup>, which gives 92-2420 kg &#56256;&#56457;&#56256;&#56323;ha<sup>-1</sup>. It has been demonstrated that on the peatlands of northern Wielkopolska <i>O. palustris</i> reaches its generative and vegetative optimum in the communities of the class <i>Scheuchzerio- Caricetea fuscae</i>, in particular in the community <i>Sphagno recurvi-Eriophoretum angustifolii</i>.

Sign in / Sign up

Export Citation Format

Share Document