THE RESPONSE OF NATIVE STANDS OF LOWBUSH BLUEBERRY IN NEWFOUNDLAND TO NITROGEN, PHOSPHORUS, AND POTASSIUM FERTILIZERS

1965 ◽  
Vol 45 (2) ◽  
pp. 145-152 ◽  
Author(s):  
A. F. Rayment
Keyword(s):  
Vegetative Growth ◽  
Average Yield ◽  
Vaccinium Angustifolium ◽  
Yield Increase ◽  
Lowbush Blueberry ◽  
Berry Size ◽  
Fruit Maturity ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Muriate Of Potash

Native Newfoundland stands of lowbush blueberries (Vaccinium angustifolium Ait.) were fertilized with ammonium nitrate, superphosphate, and muriate of potash in various combinations. Nitrogen caused earlier fruit maturity, increased berry size, and generally reduced fruit numbers, especially when in combination with added phosphorus. When nitrogen was used alone at 50 lb per acre, it gave an average yield increase of over 50% in the first pickings.When phosphorus and potassium were used together in the absence of nitrogen, there was an increase in fruit numbers resulting in higher yield. Combination of phosphorus with nitrogen was accompanied by increased vegetative growth of the blueberry and associated plants and decreased yields.

ROSETTE VEGETATIVE GROWTH OF LOWBUSH BLUEBERRY RELATED TO FREEZING TEMPERATURES

1988 ◽  
Vol 68 (2) ◽  
pp. 549-551 ◽  
Author(s):  
I. V. HALL ◽  
P. D. HILDEBRAND
Keyword(s):  
Low Temperature ◽  
Vegetative Growth ◽  
Leaf Expansion ◽  
Stages Of Development ◽  
Vaccinium Angustifolium ◽  
Potted Plants ◽  
Vegetative Buds ◽  
Lowbush Blueberry ◽  
Freezing Temperatures ◽  
Natural Stands

When potted plants of lowbush blueberries were subjected to temperatures of −2 °C for periods of 0.5–4.0 h, a rosette of leaves arising from vegetative buds was induced similar to that observed in natural stands of Vaccinium angustifolium Ait. Vegetative buds at various stages of development from green tip (2 mm) to the point of leaf expansion were equally susceptible to the low temperature injury. Variation in susceptibility among seven clones tested (Brunswick, 71–14, ME-3, NB3, 895, 752, and 694) was not observed.Key words: Lowbush blueberry, low-temperature injury

scholarly journals Effect of Boron and Calcium Foliar Sprays on Pollen Germination and Development, Fruit Set, Seed Development, and Berry Yield and Quality in Lowbush Blueberry (Vaccinium angustifolium Ait.)

1998 ◽  
Vol 123 (4) ◽  
pp. 524-531 ◽  
Author(s):  
Youzhi Chen ◽  
John M. Smagula ◽  
Walter Litten ◽  
Scott Dunham
Keyword(s):  
Pollen Germination ◽  
Fruit Set ◽  
Yield Reduction ◽  
Vaccinium Angustifolium ◽  
Foliar Sprays ◽  
Lowbush Blueberry ◽  
Berry Size ◽  
Number Of Seeds

In a managed field of native Vaccinium angustifolium Ait. clones, the effect of fall foliar sprays of B at 345 g·ha-1 and/or Ca at 3,450 g·ha-1 in remedying tissue deficiency of B varied among 12 clones, as seen in pollen germinability and on individual stems as seen in flower number, fruit set, and number of harvestable berries. With Ca applied alone, increased berry size did not overcome yield reduction due to fewer flowers and berries per stem. Berry diameter and mass correlated better to number of seeds of germinable size than to total number of seeds. Pollen germination averaged 17.4% on stigmata from untreated clones, and all three treatments (B, Ca, B + Ca) increased that average by 8%. More seeds per berry with the B-alone treatment implies more ovules fertilized when B deficiency is remedied. No relation was found between in vitro and in vivo pollen germination.

Effects of gypsum on yield and nutrient status of native lowbush blueberry

1996 ◽  
Vol 76 (2) ◽  
pp. 361-366 ◽  
Author(s):  
K. R. Sanderson ◽  
M. R. Carter ◽  
J. A. Ivany
Keyword(s):  
Prince Edward Island ◽  
Field Experiments ◽  
Nutrient Status ◽  
Nutrient Content ◽  
Marketable Yield ◽  
Vaccinium Angustifolium ◽  
Yield Increase ◽  
Lowbush Blueberry ◽  
Leaf Nutrient Concentration ◽  
Gypsum Application

Information is required on the response of native lowbush blueberry (Vaccinium angustifolium Ait.) to soil-applied calcium amendments. Field experiments were carried out in Prince Edward Island to determine the effects of applied gypsum, as a Ca source, on yield and leaf nutrient content of native lowbush blueberry at six sites, two locations per year. Sites were studied over several cropping cycles. Gypsum applied at 2, 4, 6, and 8 t ha−1 in the spring of the sprout year increased marketable yield (from 3.2 to 4.7 t ha−1) at three of six sites in the first crop year following application of gypsum. Averaged over these three sites, marketable yield was increased 47% by the application of gypsum at 4.0 t ha−1. Yield was not affected in the second and third cropping cycles. Mean berry weight and plant growth were not affected by gypsum application. Concentration of leaf Ca was increased but not consistently significant, while leaf S was significantly increased at all sites in the first cropping cycle. Soil pH was significantly reduced by gypsum in the first cropping cycle. A yield increase of 225 kg ha−1 would be sufficient to recover the costs of the applied gypsum. Key words: Gypsum, leaf nutrient concentration, lowbush blueberry, Vaccinium angustifolium Ait., yield

scholarly journals Effects of reduced application of special organic fertilizers on tea production

2021 ◽  
pp. 939-945
Author(s):  
Jinbao Liu ◽  
Minghui Jin ◽  
Zhongan Mao
Keyword(s):  
Organic Fertilizer ◽  
Economic Benefits ◽  
Organic Fertilizers ◽  
Treatment Results ◽  
Yield Increase ◽  
Combined Application ◽  
Tea Production ◽  
Phosphorus And Potassium ◽  
Tea Plants ◽  
Nitrogen Phosphorus

A trial of special fertilizer reduction and combined application of organic fertilizer on tea production, nutrients and economic benefits was carried out in the tea garden at Shihe Port, Xinyang, Henan Province, China. The experiment has six treatments of customary fertilization (CK), 100% special fertilizer for tea (T1), nitrogen reduction 20% (T2), 40% (T3), 60% (T4) and 100% (T5), and special fertilizers at the same time. Among the special fertilizer treatments for tea plants, the germination density, 100-bud weight, fresh tea yield, N, P, and K content of new shoots and economic benefits were the highest in T1 treatment, Results showed that the yield range of the five treatments was 460～632.4kg hm2. Compared with CK, the yield increase rates were 6.11, 1.99, -4.21, -13.76 and -22.82%, respectively. The growth rates of barber bud density and 100-bud weight were -20.00～25.83 and 8.40～ 8.40%, respectively. The content of nitrogen, phosphorus and potassium in the new shoots varied by 0.623～1.070, 0.047～0.183 and 1.380～2.237%, respectively. Therefore, the special fertilizer for tea plants can reduce the nitrogen by 20% to save costs and increase efficiency. Bangladesh J. Bot. 50(3): 939-945, 2021 (September) Special

scholarly journals Effects of root pruning on the vegetative growth and fruit quality of Zhanhuadongzao trees

2010 ◽  
Vol 37 (No. 1) ◽  
pp. 14-21 ◽  
Author(s):  
S. Yang ◽  
S. Xing ◽  
C. Liu ◽  
Z. Du ◽  
H. Wang ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Vegetative Growth ◽  
Microbial Populations ◽  
Root Pruning ◽  
Total Acid ◽  
Available Nitrogen ◽  
Trunk Diameter ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The effects of root pruning on the vegetative growth and fruit quality of six-year-old Zhanhuadongzao (<I>Ziziphus jujube</I> Mill.) trees were evaluated. Three root pruning treatments (severe, moderate and light degree) were conducted at the distance of 3, 5 and 7 times trunk diameter from trunk on both inter-row sides of the trees, respectively. The results showed that the severe root pruning decreased the length of primary branch by 27.9% and the number of primary branches by 12.1% in contrast to the control of no root pruning. Compared to the control, both severe and moderate root pruning had no apparent effects on nitrogen, phosphorus and potassium contents of leaves after 35 days, but had significant effects after 161 days. Severe root pruning had larger effectiveness of controlling vegetative growth than the moderate one. By root pruning, the contents of vitamin C and total sugar were increased but the content of cypermethrin was decreased in fruits and no effects were found on total acid content of fruit and yield at harvest. In the rhizosphere soil, root pruning decreased the microbial populations and enzymes activities but increased the concentrations of cypermethrin, available nitrogen, phosphorus and potassium. It is proposed that the removal of root at 3 times trunk diameter distance from trunk was feasible to regulate the vegetative growth and fruit quality of Zhanhuadongzao tree.

EFFECT OF SOIL MOISTURE AND FERTILIZER ON THE POTENTIAL AND ACTUAL YIELD OF LOWBUSH BLUEBERRIES

1984 ◽  
Vol 64 (3) ◽  
pp. 683-689 ◽  
Author(s):  
GEORGE R. BENOIT ◽  
WALTER J. GRANT ◽  
AMR A. ISMAIL ◽  
DAVID E. YARBOROUGH
Keyword(s):  
Soil Moisture ◽  
Field Capacity ◽  
Moisture Stress ◽  
Fertilizer Application ◽  
Flower Buds ◽  
Vaccinium Angustifolium ◽  
Bud Formation ◽  
Lowbush Blueberry ◽  
Berry Size ◽  
Significant Difference

Lowbush blueberry (Vaccinium angustifolium Ait.) plants were evaluated under greenhouse and field conditions to determine the effect of soil moisture stress and fertilizer applied during the year of bud formation on plant growth and development. Greenhouse plants grown under water treatments of 0.2 (about field capacity), 0.6, 1.0 and 5.0 bars did not differ significantly in number of stems per plant or flower buds per stem. A significant increase in the number of flowers per stem was detected for the 0.2- and 0.6-bar treatments over the 1.0- and 5.0-bar treatments. A highly significant trend was an increase in flowers per plant related to an increase in water application. Established field plants had no significant difference in the number of flowers between the unirrigated control and the 0.6- or 0.2-bar treatments. The number and total weight of berries increased significantly with increased water availability during the vegetative growth year but individual berry size remained the same. Irrigation during the year of bud formation may result in increased yield during the crop year. No significant fertilizer application effect was detected on the parameters evaluated.Key words: Vaccinium angustifolium, flower buds

scholarly journals Relationship between surface color and other maturity indices in wild lowbush blueberries

1995 ◽  
Vol 75 (2) ◽  
pp. 485-490 ◽  
Author(s):  
W. Kalt ◽  
K. B. McRae ◽  
L. C. Hamilton
Keyword(s):  
Principal Component Analysis ◽  
Sugar Content ◽  
Principal Component ◽  
Surface Color ◽  
Vaccinium Angustifolium ◽  
Titratable Acid ◽  
Lowbush Blueberry ◽  
Berry Size ◽  
Maturity Indices ◽  
Wild Blueberries

The surface color, size, and sugar, titratable acid and anthocyanin contents were measured on samples of various maturities from 72 individual lowbush blueberry clones to determine the relationships between surface color and other ripeness indicators. Among the total 504 berries, the maximum sugar content was approximately 5 times that of the minimum, while the maximum titratable acid and anthocyanin contents were 20 and 11 times those of the minimum contents, respectively. Correlations among variates were generally strongest for samples within clones, and they were weakest among the variate means for the 72 clones. For the total 504 berries, sugar content correlated more strongly with surface color than with berry size, while acid content correlated similarly with surface color and size. Correlations (positive or negative) among berry size and sugar and titratable acid contents did not exceed 0.60. Principal component analysis, which was used to identify groupings of correlated variates, indicated coordinated changes in berry characteristics during ripening, lower sugar and anthocyanin concentrations in large berries, and substantial interclonal variation in wild blueberries. Clonal selections obtained from an experimental trial differed significantly in all the variates measured, while wild clones without a surface bloom were not different from those clones with bloom. Key words: Lowbush blueberry, Vaccinium angustifolium, color, sugar, titratable acid, anthocyanin

THE EFFECT OF VARYING LEVELS OF NITROGEN, PHOSPHORUS AND POTASSIUM AND MANURE ON THE YIELD AND STARCH CONTENT OF POTATOES

1958 ◽  
Vol 38 (1) ◽  
pp. 1-7 ◽  
Author(s):  
W. N. Black ◽  
R. R. Cairns
Keyword(s):  
Prince Edward Island ◽  
Significant Interaction ◽  
Starch Content ◽  
Appreciable Effect ◽  
Yield Increase ◽  
Significant Yield ◽  
Phosphorus And Potassium ◽  
New London ◽  
Nitrogen Phosphorus ◽  
Plot Design

The results of an 8-year fertilizer study on the New London Illustration Station, in Prince Edward Island, are presented. A 3 × 3 × 3 factorial fertilizer study was laid down on potatoes each year in turn in one of four adjoining fields, featuring a 4-year rotation of potatoes, oats, clover and timothy hay. Combinations of N, P2O5 and K2O were applied broadcast as sub-plots in a split-plot design with two replicates. Manure treatments at 0 and 10 tons per acre were analyzed as main plots. Data were calculated on the yield and starch content of potatoes from two complete rotation cycles.Manure increased the yield of marketable potatoes by 39.5 and 78.8 bu. per acre, respectively, in the first and second cycle of the rotation. There was no significant interaction of manure by fertilizer treatments. Increased levels of nitrogen and potassium significantly reduced the starch content of tubers but increased yields in proportion to the amounts applied. With phosphorus, no significant yield increases were noted beyond the 120-lb. level during the first rotation cycle. In the second cycle, significant increases in yield were obtained, even up to 240 lb. P2O5 per acre, with no appreciable effect on potato quality.Within the scope of this study, fertilizer elements can be applied in quantities to provide economic yield increase without serious reduction of starch content.

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