scholarly journals Influence of Planting Depth and Interval to Initial Harvest on Yield and Plant Response of Asparagus

HortScience ◽  
1990 ◽  
Vol 25 (7) ◽  
pp. 754-755 ◽  
Author(s):  
Dale T. Lindgren
Keyword(s):  
Plant Response ◽  
Harvest Date ◽  
Asparagus Officinalis ◽  
Time Intervals ◽  
Planting Depth ◽  
Spring Frost ◽  
Frost Injury ◽  
Spring Harvest

Four planting depths and two time intervals (1 or 2 years) between transplanting and initial year of harvest of asparagus (Asparagus officinalis L.) yield were compared for 4 years. Spear emergence and initial spring harvest date were delayed and susceptibility to spring frost injury was decreased with increasing planting depth (from 5.0 to 20.0 cm). Over years, crown depth increased for the shallowest planting and decreased for the deepest planting. Harvesting after 1 year vs. 2 years from planting reduced yield. There were no significant interactions between year of initial harvest and depth of planting.

Two Types of Late Spring Frost Injury to Winter Wheat 1

1947 ◽  
Vol 39 (6) ◽  
pp. 536-544 ◽  
Author(s):  
J. E. Livingston ◽  
J. C. Swinbank
Keyword(s):  
Winter Wheat ◽  
Late Spring ◽  
Spring Frost ◽  
Frost Injury ◽  
Late Spring Frost

scholarly journals The occurrence of Fusarium species in white spears of Asparagus officinalis

2021 ◽  
Vol 49 (4) ◽  
pp. 12559
Author(s):  
Roman ANDRZEJAK ◽  
Beata JANOWSKA
Keyword(s):  
Species Composition ◽  
Fusarium Species ◽  
Harvest Date ◽  
Asparagus Officinalis ◽  
Fusarium Spp ◽  
Disease Symptoms

The aim of the study was to determine the species composition of fungi of the Fusarium genus found on white Asparagus officinalis spears, depending on the presence or absence of disease symptoms, age of the plantation, date of harvest and the place from which samples were collected for mycological analysis. Additionally, the pathogenicity of selected Fusarium spp. isolates was determined. A. officinalis L. was cultivated for white spears. The research was conducted on the German dioecious cultivar ‘Eposs’. Samples of A. officinalis spears for tests were collected from two plantations. Six species of fungi of the Fusarium genus were identified in the asparagus spears: F. culmorum, F. equiseti, F. oxysporum, F. proliferatum, F. solani, and F. fujikuroi. Among the Fusarium species colonizing Asparagus officinalis the greatest threat is F. oxysporum. Always there are more isolates in the spears with the symptoms, in epidermis. The late harvest date favors the development of fusariosis. This means that the spears harvested at the latest date (late June) are the most heavily colonised by fungi. The isolates of fungi of the Fusarium genus collected from the spears exhibit pathogenicity against A. officinalis plants.

Blueberry Flower Spring Frost Injury in Central Poland

2001 ◽  
Vol 1 (4) ◽  
pp. 43-49
Author(s):  
Wu Lin ◽  
Kazimierz Pliszka
Keyword(s):  
Spring Frost ◽  
Central Poland ◽  
Frost Injury

scholarly journals Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

HortScience ◽  
2003 ◽  
Vol 38 (2) ◽  
pp. 288-292 ◽  
Author(s):  
Yoshihiko Sekozawa ◽  
Sumiko Sugaya ◽  
Hiroshi Gemma ◽  
Shuichi Iwahori
Keyword(s):  
Free Amino ◽  
Sugar Content ◽  
Japanese Pear ◽  
Pyrus Pyrifolia ◽  
Ion Leakage ◽  
Full Bloom ◽  
Solute Content ◽  
Spring Frost ◽  
Injury Index ◽  
Frost Injury

Effects of n-propyl dihydrojasmonate (PDJ) treatment on flowers of Japanese pear 'Kousui' (Pyrus pyrifolia Nakai cv. Kousui) during spring frost were investigated to study mechanisms for avoiding spring frost injury. PDJ applied during the flowering period resulted in a lower injury index for the ovules and pistils after freezing tests. Average ion leakage in control flowers was 37.9% during the balloon stage at -5 °C, while the flowers treated with PDJ displayed a 16.6% ion leakage. Similarly, at the full bloom stage, PDJ treatment reduced ion leakage at -5 °C from 73.1% to 47.8% in the control. The organs of the flower more sensitive to low temperature stress were the ovule, pistil, and ovary; stamens were more resistant. Sugar content in the flower at the balloon stage was increased by PDJ when treated at the pink stage. Moreover, free amino acids, especially proline, increased similarly with PDJ treatment. These results show that PDJ affects supercooling capacity of a flower by changing solute content and protects organs from freezing.

scholarly journals Sugars and Respiration Profiles in Asparagus Spears and Changes during Storage

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 823F-823
Author(s):  
Silvanda Silva ◽  
Sven Verlinden ◽  
Robert Herner ◽  
Randolph Beaudry
Keyword(s):  
Respiration Rate ◽  
Initial Rate ◽  
The Other ◽  
Asparagus Officinalis ◽  
High Rate ◽  
Sucrose Content ◽  
Time Intervals ◽  
Respiration Rates

Base-to-tip profiles of sucrose, glucose, fructose, and respiration rate were measured for asparagus (Asparagus officinalis L.) spears stored at 0C. Fructose content was ≈3-fold and 4-fold higher than glucose and sucrose, respectively. The highest level of fructose was found in the base and was ≈15-fold higher than the tip. The changes in asparagus metabolism were characterized by loss of sucrose and a high rate of respiration within the first hours after harvest. Sucrose was more rapidly lost than the other sugars during this period. The respiration rate was measured along the length of intact spears at 0.5, 1, 2, and 3 h after harvest. Subsequent measurements were taken after larger time intervals for 23 days. The respiration rate declined rapidly to ≈60% of the initial rate within 12 h, decreasing more slowly thereafter. Initially, the respiration rate of the tip was about four times that of the base, but, after 23 days, the respiration rate of the tip was only twice that of the base. Sucrose content and respiration rates were closely correlated.

Effect of Spring Harvest Date on Nutritive Value of Orchardgrass and Timothy

1968 ◽  
Vol 27 (2) ◽  
pp. 562 ◽  
Author(s):  
R. H. Brown ◽  
R. E. Blaser ◽  
J. P. Fontenot
Keyword(s):  
Nutritive Value ◽  
Harvest Date ◽  
Spring Harvest

scholarly journals Production and multiplication of national potato varieties in family farming systems

2020 ◽  
Vol 23 (2) ◽  
pp. 74-79
Author(s):  
P. L. Colnago; F. Vilaró; P. González
Keyword(s):  
Current System ◽  
National Level ◽  
Total Yield ◽  
Harvest Date ◽  
Small Scale ◽  
Production Volume ◽  
Alternative Scheme ◽  
Family Farmers ◽  
Management Factors ◽  
Spring Harvest

Potato is the main vegetable in terms of production volume at national level. In Uruguay, two agricultural cycles are carried out every year, in autumn and in spring. Potato small-scale family farmers represent 80% in number and cover only 10% of national area. The current system of seed multiplication allows for two  crops in two years, involving the conservation of seed tubers for six  months. An alternative scheme for family farmers has been proposed, based on the use of national short dormancy varieties. With proper management, it is possible to obtain four crops in two years. In order to support the insertion of family farmers in a multiplication scheme of national varieties and to identify the main management factors to be improved, the monitoring of seed production was carried out in 2016. Farms were visited every 15 days to assess crop growth and health and support decision making. Total yield was estimated and classified into categories. Critical management factors discussed with farmers were crop design and density, emergence, harvest and post harvest management. We found harvest date is a bottleneck for family farmers, where delays in harvest are frequent. The delay of the spring harvest would not allow using these seeds for the autumn crop since they would not reach an adequate sprouting state. In spite of the fact that national varieties have short dormancy, for this scheme of seed multiplication, the spring harvest date is a key factor to ensure a proper sprout status for the next planting season.

scholarly journals Impact of Cutting Pressure on Yield, Quality, Root Carbohydrates, and Survival of Spring-harvested or Summer-forced Asparagus

HortScience ◽  
2005 ◽  
Vol 40 (5) ◽  
pp. 1327-1332 ◽  
Author(s):  
Robert J. Dufault ◽  
Brian Ward
Keyword(s):  
Plant Stress ◽  
Asparagus Officinalis ◽  
Yield Quality ◽  
Spring Harvest

Excessive cutting pressure (CP) early in the lifespan of an asparagus (Asparagus officinalis L.) plantation may weaken and reduce yields and quality. The objective of this research was to determine how increasing CP affects yield, quality, and survival of spring-harvested and summer-forced asparagus. `Jersey Gem' asparagus was harvested for 4 years (1999–2002) in spring or summer-forced on 1 Aug. using the following CP (weeks/year from 1st to 4th years, respectively): 2, 3, 4, 6 (low), 3, 4, 5, 7 (medium), and 4, 5, 8, 10 (high). In all harvest years, as CP increased, marketable number and weight increased. Yield in spring harvest seasons significantly increased with each increase in CP. In summer, yield significantly increased only when high CP was used with equivalent yields at low and medium CP. With summer forcing, there were 48% and 55% fewer large spears at medium and high CP, respectively, compared to the same CP used during spring harvest seasons. Stands tended to decrease with CP from 1997 to 2003, but these differences were not significant and not severe enough to kill the plants. Yearly root fructose concentrations (RFC) with all CP increased yearly from 1999 to 2001 and plateaued from 2002 to 2003. From 1999 to 2002, RFC increased 53%, 27%, 13%, and 13% in unharvested control, low, medium, and high CP, respectively, indicating that with a greater CP, RFC decreased. RFC in summer-forced asparagus was significantly less than spring-harvested in 83% of all sample months. RFC in spring-harvested asparagus was similar to unharvested asparagus in February, March, April, November, and December; however, in all other sample months, spring-harvested RFC was significantly lower than unharvested control plants. The highest CP scheme is appropriate for spring-harvested asparagus based on greatest marketable yields and acceptable cull losses. For summer-forced asparagus, the lowest CP scheme is more appropriate based on acceptable marketable yields and to avoid undue plant stress verified by unacceptably large cull losses mostly attributed to spindly spear size and lower RFC.

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