DRYING RATE AND HARVEST LOSSES OF WINDROWED VERSUS DIRECT COMBINED BARLEY

1989 ◽  
Vol 69 (3) ◽  
pp. 713-720 ◽  
Author(s):  
J. M. CLARKE
Keyword(s):  
Water Concentration ◽  
Dry Weight ◽  
Field Studies ◽  
Cereal Crops ◽  
Drying Rate ◽  
Harvest Time ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Drying Rates ◽  
Made In

Windrowing of cereal crops prior to harvest is reported to hasten drying and reduce losses due to shattering compared to direct combining, but few direct comparisons have been made in barley (Hordeum vulgare L.). Field studies were conducted over 4 yr to compare drying rates and harvest losses in windrowed and standing barley cultivars with varying susceptibility to shattering. Cutting treatments for comparing harvesting losses were initiated when kernel water concentration (KWC) dropped below about 670 g water per kg kernel dry weight, and were continued for 2 wk after combine ripeness (KWC 174 g kg−1). Natural shattering losses and cutting losses were measured at each cutting time, while combine pick-up losses were determined after combining of windrows cut at KWCs greater than 174 g kg−1. Cutting and pick-up losses were independent of harvest time when KWC at cutting was greater than 174 g kg−1. Cutting loss increased after combine ripeness, but was not related to cultivar shattering susceptibility. Combine pick-up losses ranged from 0.4 to 4.3% of yield, and were greater in low-yielding crops than in high-yielding crops. Total harvesting losses for direct combining ranged from 0.1 to 2.8% of yield compared to 0.8–7.7% for windrowing prior to combining in crops harvested at or before combine ripeness. Direct combining 1 and 2 wk later caused increased harvest losses (0.3–20% of yield) which were proportional to cultivar shattering susceptibility. Windrowed barley dried to combine ripeness from 0 to 3 d (mode 1 d) faster than standing barley.Key words: Barley, shattering susceptibility, cutting loss, combine pick-up loss, harvest losses, harvest methods

A reappraisal of stem reserve contribution to grain yield in spring barley (Hordeum vulgare L.)

1982 ◽  
Vol 98 (2) ◽  
pp. 347-355 ◽  
Author(s):  
R. W. Daniels ◽  
M. B. Alcock ◽  
D. H. Scarisbrick
Keyword(s):  
Grain Yield ◽  
Spring Barley ◽  
Dry Weight ◽  
Reserve Capacity ◽  
Hordeum Vulgare L ◽  
Grain Yields ◽  
Plant Parts ◽  
Commercial Practice ◽  
Barley Cultivars ◽  
Stem Reserves

SUMMARYPre-anthesis stem reserve contribution to grain yield was assessed in two spring barley cultivars of contrasting height. It was greatest in the taller, but final grain yields were similar. Partitioning of total reserve capacity to various plant parts showed that the leaf and sheath below the peduncle were most important, followed by stem internodes which had increasing reserve capacity up to internode 4.It is suggested that stem reserves are valuable for yields commonly achieved in U.K. commercial practice.High grain yields were associated with large positive increases in stem dry weight after anthesis. This would indicate that the source capacity to boost yield is more than proportional to that required to fill the grain alone.

scholarly journals Moderate sodium has positive effects on shoots but not roots of salt-tolerant barley grown in a potassium-deficient sandy soil

2011 ◽  
Vol 62 (11) ◽  
pp. 972 ◽  
Author(s):  
Qifu Ma ◽  
Richard Bell ◽  
Ross Brennan
Keyword(s):  
Root Growth ◽  
Shoot Growth ◽  
Dry Weight ◽  
Triticum Aestivum L ◽  
Salt Tolerant ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Positive Effects ◽  
Shoot Dry Weight ◽  
K Deficiency

In the agricultural lands of south-western Australia, salinity severely affects about 1 million hectares, and there is also widespread occurrence of potassium (K) deficiency. This study investigated whether the effects of sodium (Na) on crop K nutrition vary with plant salt sensitivity. In a glasshouse experiment with loamy sand, two barley cultivars (Hordeum vulgare L. cv. Gairdner, salt sensitive, and cv. CM72, salt tolerant) and one wheat cultivar (Triticum aestivum L. cv. Wyalkatchem, salt tolerant) were first grown in soil containing 30 mg extractable K/kg for 4 weeks to create mildly K-deficient plants, then subjected to Na (as NaCl) and additional K treatments for 3 weeks. Although high Na (300 mg Na/kg) reduced leaf numbers, moderate Na (100 mg Na/kg) hastened leaf development in barley cultivars but not in wheat. In the salt-tolerant CM72, moderate Na also increased tiller numbers, shoot dry weight and Na accumulation, but not root growth. The positive effect of moderate Na on shoot growth in CM72 was similar to that of adding 45 mg K/kg. Root growth relative to shoot growth was enhanced by adequate K supply (75 mg K/kg) compared with K deficiency, but not by Na supply. Soil Na greatly reduced the K/Na and Ca/Na ratios in shoots and roots, while additional K supply increased the K/Na ratio with little effect on the Ca/Na ratio. The study showed that the substitution of K by Na in barley and wheat was influenced not only by plant K status, but by the potential for Na uptake in roots and Na accumulation in shoots, which may play a major role in salt tolerance. The increased growth in shoots but not roots of salt-tolerant CM72 in response to moderate Na and the greater adverse effect of soil K deficiency on roots than shoots in all genotypes would make the low-K plants more vulnerable to saline and water-limited environments.

scholarly journals Manipulation of Barley Development and Flowering Time by Exogenous Application of Plant Growth Regulators

2022 ◽  
Vol 12 ◽  
Author(s):  
Brendan M. Kupke ◽  
Matthew R. Tucker ◽  
Jason A. Able ◽  
Kenton D. Porker
Keyword(s):  
Plant Growth ◽  
Flowering Time ◽  
Growth Regulators ◽  
Field Studies ◽  
Sowing Date ◽  
Flowering Period ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Controlled Conditions ◽  
Accelerate Development

Matching flowering time to the optimal flowering period in Mediterranean cropping zones is pivotal to maximize yield. Aside from variety selection and sowing date, growers have limited options to alter development in season. Plant hormones and growth regulators are used in perennial horticultural systems to manipulate development and floral initiation. In this study, a range of plant hormonal products were tested to analyze their effects on barley (Hordeum vulgare L) development by exogenous spray applications. Plants were grown in controlled conditions under long and short photoperiods with different vernalization treatments. The gibberellin (GA) products demonstrated the greatest potential for altering development. The GA inhibitor trinexapac-ethyl was able to delay the time to flowering in genetically divergent barley cultivars by up to 200 degree days under controlled conditions. A similar delay in flowering could be achieved via application at both early (GS13) and late (GS33) stages, with higher rates delaying flowering further. Notably, trinexapac-ethyl was able to extend the duration of pre-anthesis phases of development. By contrast, GA3 was unable to accelerate development under extreme short (8 h) or long (16 h) day lengths. There was also little evidence that GA3 could reproducibly accelerate development under intermediate 10–12 h day lengths. In addition, sprays of the cytokinin 6-benzyladenine (6-BA) were unable to reduce the vernalization requirement of the winter genotype Urambie. The present study provides baseline data for plant growth regulator treatments that delay cereal development. These treatments might be extended in field studies to align flowering of early sown crops to the optimal flowering period.

DEFOLIATION ENHANCES GREEN FORAGE PERFORMANCE BUT INHIBITS GRAIN YIELD IN BARLEY (HORDEUM VULGARE L.)

2015 ◽  
Vol 52 (3) ◽  
pp. 391-404
Author(s):  
XIAODONG CHEN ◽  
BIN ZHAO ◽  
LIANG CHEN ◽  
RUI WANG ◽  
CHANGHAO JI
Keyword(s):  
Grain Yield ◽  
Calcium Content ◽  
Dry Weight ◽  
Kernel Weight ◽  
Forage Yield ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Growing Seasons ◽  
Grain Number Per Spike ◽  
One Year

SUMMARYTo evaluate the effects of defoliation on green forage performance and grain yield (GY) variation in barley, five barley genotypes were imposed on three levels of defoliation treatments over two consecutive growing seasons in this study. The results indicated that green forage yields were significantly improved by repeated defoliation. The traits of green forage quality, including the ratio of dry weight to fresh weight, crude ash and calcium content were improved, while crude protein and crude fat were reduced, and crude fiber and phosphorus contents appeared not to be influenced by repeated defoliation. Plant height (PH), GY and other yield components, grain number per spike and thousand kernel weight, were significantly reduced by defoliation over the two growing seasons, while internode length below spike was less affected. Reduction in spike length and the number of spikes per plant were identified in only one year. Correlation analysis revealed that only PH exhibited a positive correlation with GY. Effects of genotype, interaction between genotype and defoliation, and environments on changes of forage yield and quality and GY were also discussed. Our current work provides a feasible approach to select elite barley cultivars with optimal defoliation treatments for both forage and grain uses in barley breeding programme.

EFFECT OF HARVEST TIME AND DRYING METHOD ON QUALITY AND GRADE OF WINTER RYE

1987 ◽  
Vol 67 (2) ◽  
pp. 417-424
Author(s):  
J. G. McLEOD ◽  
J. M. CLARKE
Keyword(s):  
Secale Cereale ◽  
Water Concentration ◽  
Dry Weight ◽  
Test Mass ◽  
Winter Rye ◽  
Harvest Time ◽  
Drying Method ◽  
Falling Number ◽  
Secale Cereale L ◽  
Forced Air

Three winter rye (Secale cereale L.) cultivars, Cougar, Puma and Musketeer, were grown in a field experiment for 2 yr to determine the effects of kernel water concentration (KWC) at harvest time and drying method on final quality and grade of the grain. Plots were harvested when KWC was in the range of 950–100 g water kg−1 kernel dry weight. Grain was dried in windrows in the field and artificially in a forced-air oven at 40–45 °C. Kernel water concentration at harvest, test mass, kernel mass, falling number and germination were determined. Test mass increased as KWC at harvest decreased, especially in the artificially dried treatments. Kernel mass was lower when harvested at high KWC, especially in the windrowed treatments. Falling numbers were affected by harvest time and drying method, but trends were not clear. Germination was reduced by artificial drying at KWC greater than 430 g kg−1. Grades were not affected by windrowing at KWC up to 957 g kg−1. Artificial drying reduced commercial grades, especially at high KWC. The main degrading factors were presence of immature kernels and low test mass.Key words: Test mass, artifical drying, windrow, germination, falling number, harvest time

SEED SIZE, GERMINATION RESISTANCE AND SEEDLING VIGOR IN BARLEY

1971 ◽  
Vol 51 (2) ◽  
pp. 93-99 ◽  
Author(s):  
W. J. R. BOYD ◽  
A. G. GORDON ◽  
L. J. LACROIX
Keyword(s):  
Hordeum Vulgare ◽  
Seed Size ◽  
Dry Weight ◽  
Seedling Vigor ◽  
Hordeum Vulgare L ◽  
Barley Cultivars ◽  
Head Type

Marked differences in seedling vigor, as measured by dry weight two weeks after germination, have been demonstrated in F3 lines of a barley (Hordeum vulgare L. emend Lam.) cross between CI 5791 and Ming (CI 4797). These differences can be largely accounted for by differences in seed size, which is itself related to segregation for head type, and by differences in germination resistance. The latter character varies between cultivars and is itself influenced by seed size to some extent. It is concluded that, although seed size, directly and indirectly, can influence seedling vigor, inherent differences in this respect exist between barley cultivars. The significance of this is briefly considered.

scholarly journals Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

2021 ◽  
Vol 11 (7) ◽  
pp. 2979
Author(s):  
Maxime Fortin Faubert ◽  
Dominic Desjardins ◽  
Mohamed Hijri ◽  
Michel Labrecque
Keyword(s):  
Soil Surface ◽  
Field Work ◽  
Field Studies ◽  
Soil Hydrology ◽  
Intensive Culture ◽  
Shrub Species ◽  
Short Rotation ◽  
Pollutant Concentrations ◽  
Polycyclic Aromatic ◽  
Made In

The Salix genus includes shrub species that are widely used in phytoremediation and various other phytotechnologies due to their advantageous characteristics, such as a high evapotranspiration (ET) rate, in particular when cultivated in short rotation intensive culture (SRIC). Observations made in past field studies suggest that ET and its impact on soil hydrology can also lead to increases in soil pollutant concentrations near shrubs. To investigate this, sections of a mature willow plantation (seven years old) were cut to eliminate transpiration (Cut treatment). Soil concentrations of polychlorinated biphenyls (PCBs), aliphatic compounds C10–C50, polycyclic aromatic hydrocarbons (PAHs) and five trace elements (Cd, Cr, Cu, Ni and Zn) were compared between the Cut and the uncut plots (Salix miyabeana ‘SX61’). Over 24 months, the results clearly show that removal of the willow shrubs limited the contaminants’ increase in the soil surface, as observed for C10–C50 and of 10 PAHs under the Salix treatment. This finding strongly reinforces a hypothesis that SRIC of willows may facilitate the migration of contaminants towards their roots, thus increasing their concentration in the surrounding soil. Such a “pumping effect” in a high-density willow crop is a prominent characteristic specific to field studies that can lead to counterintuitive results. Although apparent increases of contaminant concentrations contradict the purification benefits usually pursued in phytoremediation, the possibility of active phytoextraction and rhizodegradation is not excluded. Moreover, increases of pollutant concentrations under shrubs following migration suggest that decreases would consequently occur at the source points. Some reflections on interpreting field work results are provided.

scholarly journals Saccharomyces cerevisiae Fermentation of 28 Barley and 12 Oat Cultivars

Fermentation ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 59
Author(s):  
Timothy J. Tse ◽  
Daniel J. Wiens ◽  
Jianheng Shen ◽  
Aaron D. Beattie ◽  
Martin J. T. Reaney
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Succinic Acid ◽  
Alcoholic Fermentation ◽  
Ethanol Yield ◽  
Cereal Crops ◽  
Fermentation Products ◽  
Barley Cultivars ◽  
Oat Cultivars

As barley and oat production have recently increased in Canada, it has become prudent to investigate these cereal crops as potential feedstocks for alcoholic fermentation. Ethanol and other coproduct yields can vary substantially among fermented feedstocks, which currently consist primarily of wheat and corn. In this study, the liquified mash of milled grains from 28 barley (hulled and hull-less) and 12 oat cultivars were fermented with Saccharomyces cerevisiae to determine concentrations of fermentation products (ethanol, isopropanol, acetic acid, lactic acid, succinic acid, α-glycerylphosphorylcholine (α-GPC), and glycerol). On average, the fermentation of barley produced significantly higher amounts of ethanol, isopropanol, acetic acid, succinic acid, α-GPC, and glycerol than that of oats. The best performing barley cultivars were able to produce up to 78.48 g/L (CDC Clear) ethanol and 1.81 g/L α-GPC (CDC Cowboy). Furthermore, the presence of milled hulls did not impact ethanol yield amongst barley cultivars. Due to its superior ethanol yield compared to oats, barley is a suitable feedstock for ethanol production. In addition, the accumulation of α-GPC could add considerable value to the fermentation of these cereal crops.

scholarly journals Biosolids Benefit Yield and Nitrogen Uptake in Winter Cereals without Excess Risk of N Leaching

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1482
Author(s):  
Silvia Pampana ◽  
Alessandro Rossi ◽  
Iduna Arduini
Keyword(s):  
Triticum Turgidum ◽  
N Uptake ◽  
Dry Weight ◽  
Triticum Aestivum L ◽  
N Leaching ◽  
Specific Rate ◽  
Mineral Fertilization ◽  
Hordeum Vulgare L ◽  
Mineral N ◽  
Winter Cereals

Winter cereals are excellent candidates for biosolid application because their nitrogen (N) requirement is high, they are broadly cultivated, and their deep root system efficiently takes up mineral N. However, potential N leaching from BS application can occur in Mediterranean soils. A two-year study was conducted to determine how biosolids affect biomass and grain yield as well as N uptake and N leaching in barley (Hordeum vulgare L.), common wheat (Triticum aestivum L.), durum wheat (Triticum turgidum L. var. durum), and oat (Avena byzantina C. Koch). Cereals were fertilized at rates of 5, 10, and 15 Mg ha−1 dry weight (called B5, B10, and B15, respectively) of biosolids (BS). Mineral-fertilized (MF) and unfertilized (C) controls were included. Overall, results highlight that BS are valuable fertilizers for winter cereals as these showed higher yields with BS as compared to control. Nevertheless, whether 5 Mg ha−1 of biosolids could replace mineral fertilization still depended on the particular cereal due to the different yield physiology of the crops. Moreover, nitrate leaching from B5 was comparable to MF, and B15 increased the risk by less than 30 N-NO3 kg ha−1. We therefore concluded that with specific rate settings, biosolid application can sustain yields of winter cereals without significant additional N leaching as compared to MF.

scholarly journals Effects of different drying rates on the physiological quality of Coffea canephora Pierre seeds

2005 ◽  
Vol 17 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Sttela Dellyzete Veiga Franco da Rosa ◽  
Delacyr da Silva Brandão Júnior ◽  
Édila Vilela de Resende Von Pinho ◽  
André Delly Veiga ◽  
Luiz Hildebrando de Castro e Silva
Keyword(s):  
Water Content ◽  
Storage Temperature ◽  
Removal Rate ◽  
Coffea Canephora ◽  
Development Stage ◽  
Seed Vigor ◽  
Drying Rate ◽  
Physiological Quality ◽  
Drying Rates

Desiccation tolerance in seeds depends on the species, development stage and drying conditions, especially the water removal rate. Coffea seeds are considered of intermediate performance, because they tolerate relative dehydration compared to orthodox seeds and are sensitive to low temperatures. The objective of this study was to verify the effect of different drying rates on the viability and storability of Coffea canephora seeds. A complete randomized experimental design was used, in a factorial 3 x 5 x 2 design, with three drying rates (fast, intermediate and slow), five final mean water contents after drying (51, 42, 33, 22 and 15 %) and two storage temperatures (10 and 20°C). The germination and seed vigor assessments, using radicle protrusion, cotyledon leaf opening, seedling emergence and emergence speed index, were performed shortly after drying and after two and four months storage. It was observed that with reduction in the water content there was reduction in the germination values and seed vigor, for all the drying rates. The greatest reductions in physiological quality occurred when the seeds were dried quickly and the best results were obtained at the intermediate drying rate. There was an effect of drying rate and storage temperature on the physiological quality of the seeds, and lower germination and vigor values were observed in seeds with lower water content stored at 20°C. C. canephora seeds were tolerant to desiccation down to 15 % water content and can be stored for four months at 10°C. A temperature of 20ºC can be used to store C. canephora seeds, as long as the water content is not reduced to values below 22 % water content.

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