Effect of centre of production, maturity and storage treatment of seed tubers on the growth of early potatoes: I. Sprout development in storage

1969 ◽  
Vol 73 (2) ◽  
pp. 161-166 ◽  
Author(s):  
P. B. Goodwin ◽  
A. Brown ◽  
J. H. Lennard ◽  
F. L. Milthorpe
Keyword(s):  
Storage Conditions ◽  
Southern Region ◽  
Post Harvest ◽  
Long Period ◽  
Temperature Conditions ◽  
Seed Tubers ◽  
Storage Treatment ◽  
Sprout Length ◽  
Duration Of Storage ◽  
And Storage

SUMMARYThe effect of three centres of production, two times of lifting and two post-harvest treatments of apparently virus-free seed tubers on sprout development at planting was studied over two seasons. Sprout length and degree of development were determined mainly by the light and temperature conditions during storage. Under similar storage conditions tubers from the most southern region, lifted early and allowed to sprout from lifting produced longer sprouts than those from the more northerly regions, lifted late and sprouted from midwinter. At planting all tubers had sprouts longer than 2·5 cm. Desprouted tubers from the more southern regions had the highest number of sprouts at planting and tubers 'greened' immediately on lifting had the least.An index of sprout development at planting was defined. The conditions and duration of storage had most influence on the degree of development as measured by this index; sprouts were most developed on tubers sprouted over a long period and on those sprouted in a heated glasshouse. The effects of varying centres of production and times of lifting on sprout development at planting were small compared with those readily produced by varying the storage conditions.

Influence of production and storage conditions on subsequent growth and tuber yield of potato (Solanum spp.) in the hot tropics

1992 ◽  
Vol 119 (1) ◽  
pp. 45-58 ◽  
Author(s):  
D. J. Midmore ◽  
J. Roca
Keyword(s):  
Dry Matter ◽  
Storage Conditions ◽  
Plant Vigour ◽  
Seed Tubers ◽  
Double Cropping ◽  
Tuber Dry Matter ◽  
Hot Season ◽  
Good Quality Seed ◽  
And Storage ◽  
Cool Conditions

SummaryA series of experiments to quantify the response of diverse potato genotypes to production and storage conditions in hot climates was carried out in 1984–87 at three sites in Peru, two of which were characterized by at least one hot season per year. Yield stability and field performance of seed tubers of six clones produced in situ, and stored in diffused light (DLS) or cold stored (CS), were compared with those of good quality seed tubers produced and stored in cool conditions. The yield potential of tubers produced in hot climates and grown as (i) a double crop per year with short DLS (1–4 months) (ii) a single crop per year with long DLS (c. 8 months) and (iii) a single crop per year with long CS (c. 8 months) was compared with that of seed tubers produced in cool conditions and introduced in successive crops.The first replanting of tubers produced in hot climates resulted in lower yield than that of coolproduced tubers. Yield reductions in clones ranged from 30 to 93% when replanted within 4 months, from 10 to 100% when replanted after 7–10·5 months of DLS and from 0 to 82% after similar periods of CS. Reduced yield was often due to poor plant vigour and crop growth leading to inefficient interception of solar radiation. There was, however, no evidence that the efficiency of utilization of intercepted radiation for tuber dry matter production was influenced by storage treatment. Poor sprout growth at planting reduced yield considerably for late clones in double cropping. Low dry matter content of tubers produced in hot climates did not influence emergence rate, but was related to poor plant vigour in the first replant under warmer conditions. Replanting and storage in hot climates did not enhance the initial reduction of tuber dry matter, which was evident after the first hot season. Tuber yields continued to decline, particularly under single cropping with long DLS.For the clones studied, CS would be a feasible storage method for potato production in hot climates if replanted tubers were used on an annual basis. For double cropping, short dormancy is essential; however, poor plant vigour results in additional yield reductions. Our data indicate that clonal selection for maximum production in hot climates should take into account the proposed or existing production and storage schemes.

EFFECTS OF DURATIONS OF 32 °C AND 20 °C POSTHARVEST BULB TREATMENTS ON EARLY FORCING OF IDEAL IRIS

1981 ◽  
Vol 61 (3) ◽  
pp. 647-652
Author(s):  
R. P. DOSS
Keyword(s):  
Storage Conditions ◽  
Optimal Combination ◽  
Postharvest Storage ◽  
C Storage ◽  
Storage Treatment ◽  
Harvest Dates ◽  
Duration Of Storage ◽  
Time Required ◽  
Optimal Set

The effect of the duration of an initial 32 °C and a subsequent 20 °C storage treatment on the performance of greenhouse-forced Ideal iris was investigated. Bulbs from several size categories and from several harvest dates were used with the goal of finding an optimal set of postharvest storage conditions for early forcing. Flowering percentage increased and the length of time required for glasshouse forcing decreased with longer storage (up to 5 wk) at 32 °C. With increasing duration of storage at 20 °C (up to 6 wk) the time required for glasshouse forcing decreased, whereas flowering percentage was influenced only slightly. A near optimal combination for early forcing of 10–11 cm circumference bulbs harvested after 1 Aug., was 4 wk of storage at 32 °C followed by 2 wk at 20 °C and 6 wk at 10 °C. The Dutch treatment for early forcing was unsatisfactory for use with Washington-grown bulbs.

Effect of centre of production, maturity and storage treatment of seed tubers on the growth of early potatoes: II. Field growth

1969 ◽  
Vol 73 (2) ◽  
pp. 167-176 ◽  
Author(s):  
P. B. Goodwin ◽  
A. Brown ◽  
J. H. Lennard ◽  
F. L. Milthorpe
Keyword(s):  
Tuber Yield ◽  
Climatic Conditions ◽  
Southern Region ◽  
Tuber Initiation ◽  
Field Crop ◽  
Stem Number ◽  
Seed Tubers ◽  
Subsequent Crop ◽  
And Storage ◽  
Soil Level

SUMMARYStudies were carried out on the effect of source, time of lifting and post-harvest treatment of apparently virus-free Arran Pilot seed potatoes on subsequent crop growth. The experiments were carried out in 1961–2 and 1962–3 at Efford, Sutton Bonington and Edinburgh. Seed tubers from the more southern region, which were older and showed greater sprout development at planting, gave plants with a higher stem number at soil level, a higher tuber number and a greater percentage of the tuber yield as seed grade than northern-produced seed. High bulking rates were associated with early emergence, high tuber numbers and late apparent time of tuber initiation. In 1962 southern seed produced plants which initiated tubers early and had low bulking rates and low final yields. In 1963 seed source had little effect on the time of tuber initiation of resulting plants, and southern-produced seed gave plants with high bulking rates and high final yields. Early lifted and greened tubers gave rise to plants with the same pattern of response as seed produced at the southern centre. It is suggested that this variation in response between years was due to the climatic conditions at the time of tuber initiation in the field crop.Seed of a required state at planting can usually be obtained by growth at the centre of ware production provided disease can be controlled and the time between harvesting of seed and planting is longer than about 3 months.

scholarly journals THE INFLUENCE OF ANAEROBIC CONDITIONS OF MAIZE GRAIN STORAGE ON THE CHANGES IN THE QUALITY PARAMETER “FALLING NUMBER”

2019 ◽  
Vol 13 (3) ◽  
Author(s):  
A. Borta ◽  
M. Zhelobkova
Keyword(s):  
Moisture Content ◽  
Initial Moisture Content ◽  
Quality Parameters ◽  
Falling Number ◽  
Anaerobic Conditions ◽  
Post Harvest ◽  
Temperature Conditions ◽  
Grain Processing ◽  
Duration Of Storage ◽  
Maize Grain

In recent decades, at Ukrainian farms and grain-processing enterprises, the technology of storing grain in silo bags has become widespread. In this type of storage, anaerobic conditions are created due to the physiological respiration process, which ensures extended shelf life of freshly harvested grain. This, in turn, allows the use of low-power processing equipment for post-harvest grain processing, which is especially important for wet and moist maize as it requires powerful grain dryers. The article presents the results of a study of the effect that the initial moisture content of maize grain, the temperature and the duration of its storage under anaerobic conditions have on the Falling Number, one of the quality parameters depending on the amylase activity of the grain. The object of the study was grain samples of freshly harvested (in 2017) dent maize, the hybrid DKC 3705, with the average moisture contents 14%, 21%, and 28%, stored under anaerobic conditions for 3 months at temperatures of +18°C, +11°C, and +4°C. The Falling Number was determined by the standardized Hagberg-Perten method on a ПЧП-7 instrument (“Falling Number Apparatus”). Based on the results obtained, histograms of the kinetics of Falling Number changes have been constructed, the analysis of which made it possible to establish patterns of the changes in the Falling Number depending on the moisture content of the grain and the duration of its storage at different temperatures. It has been shown that in the maize grain samples with the initial moisture content 14%, regardless of the temperature conditions during storage for 3 months, there is a steady tendency to a gradual decrease in the Falling Number. In the maize grain samples with the initial moisture content over 14%, at the beginning of storage, there is a period of an increase in the Falling Number, the intensity of which depends on the initial moisture content of the grain and the temperature conditions of its anaerobic storage. After the completion of post-harvest maturation processes in freshly harvested maize grain, its further storage leads to a decrease in the Falling Number. To summarize the experimental data, a nonlinear empirical equation is suggested to describe the patterns of changes in the Falling Number depending on the factors studied: the moisture content of maize grain, the temperature conditions and duration of storage. Considering that the value of the Falling Number is determined by the activity of the amylase complex of the grain, it can be used as an express method of monitoring the state of grain stored in silo bags.

scholarly journals Effect of Closure, Packaging and Storage Conditions on Impact Odorants of Wine

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S62-S65 ◽  
Author(s):  
G. J Pickering ◽  
A. Blake ◽  
Y. Kotseridis
Keyword(s):  
Storage Temperature ◽  
Isoamyl Acetate ◽  
Storage Conditions ◽  
Wine Quality ◽  
Cabernet Franc ◽  
Temperature Conditions ◽  
Bottle Aging ◽  
Phenethyl Acetate ◽  
And Storage ◽  
Over Time

3-alkyl-2-methoxypyrazines (MPs) represent an important and potent class of odor-active compounds associated with wine quality. 30 ng/l each of 3-isobutyl-2-methoxypyrazine, 3-isopropyl-2-methoxypyrazine and 3-secbutyl-2-methoxypyrazine were added to a Riesling and Cabernet Franc wine and monitored with HS-SPME-GC-MS over 18 months to investigate the effects of various closure and packaging options as well as light and storage temperature on MPs. Other impact odorants were monitored using SPE-GC-FID. Changes in MP concentrations during bottle aging varied with closure/packaging option, with the greatest decrease evident in Tetrapak® cartons. We observed similar changes in other impact odorants to previous studies, with synthetic corks displaying an increased capacity for sorption compared to natural corks and screwcaps. MPs did not vary consistently over time with light or temperature conditions. Acetate esters decreased, regardless of light or temperature conditions, while phenethyl acetate and isoamyl acetate decreased at a greater rate in ambient temperature conditions compared with 12°C. Free and bound SO<sub>2</sub> retention was higher in light-excluded conditions and influenced by bottle hue.

scholarly journals Post-harvest respiration of Pinus radiata logs under different temperature and storage conditions

2015 ◽  
Vol 45 (1) ◽  
Author(s):  
Jinquan Feng ◽  
Allan Woolf ◽  
Xingyun Yang ◽  
Shane Olsson ◽  
Don Brash ◽  
...  
Keyword(s):  
Pinus Radiata ◽  
Storage Conditions ◽  
Post Harvest ◽  
And Storage
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