Influence of post-harvest residue management and cultivar on tiller dynamics and seed yield in timothy

1994 ◽  
Vol 74 (3) ◽  
pp. 507-513 ◽  
Author(s):  
M. H. Entz ◽  
S. R. Smith Jr. ◽  
D. J. Cattani ◽  
A. K. Storgaard
Keyword(s):  
Seed Yield ◽  
Yield Components ◽  
Phleum Pratense ◽  
Residue Management ◽  
Cultivar Differences ◽  
Grass Species ◽  
Compensatory Mechanisms ◽  
Burn Treatment ◽  
Post Harvest ◽  
Harvest Residue

Timothy (Phleum pratense L.) is a bunch-type cool season perennial grass species grown in Manitoba primarily for seed production. The objectives of this study were to determine the effect of post-harvest residue management (straw removal-SR, straw and stubble removal-SSR and fall burning-Burn) on tiller production, yield components and seed yield of five timothy cultivars (Basho, Climax, Goliath, Hokuo and Salvo), and to better understand the association between yield components and final seed yield in timothy crops grown in the dry subhumid region of the Canadian prairies. Two experiments were conducted over four production seasons at Arborg, MB and one production season at St. Claude, MB. Tiller number per m2 in spring (TS) and at harvest (THV) were measured in 1990 at St. Claude and in 1990 and 1991 at Arborg. Residue management (RM) treatment ranking for TS was Burn < SR < SSR, but tiller senescence and compensatory mechanisms resulted in equivalent THV values across all RM treatments. The number of seed-bearing tillers m−2 at harvest was also unaffected by RM. Seed yield was unaffected by RM in all instances, except at Arborg in 1989 where a significant RM × cultivar interaction was observed. The basis of the interaction was the greater sensitivity of Hokuo to the Burn treatment. Cultivar differences for seed yield were relatively consistent over years and between the two experiments, with Climax always ranking in the high yielding group and Salvo with the low yielding group. Based on analysis of yield components, it appeared that RM most affected early season growth (i.e. TS), while cultivar most affected later season growth (fertile tillers per unit area, seed yield per fertile tiller (SYFT)). Seed yield differences were most closely associated with SYFT (r2 = 0.97**) across cultivar treatments. Key words: Burning, straw removal, harvest index, yield components, forages

scholarly journals Effect of post-harvest forestry residue management practices on the diversity of epigeal coleopterans

2017 ◽  
Vol 70 (1) ◽  
pp. 8069-8075 ◽  
Author(s):  
Priscila Ramírez Aliaga ◽  
Amanda Huerta Fuentes ◽  
Jaime Eduardo Araya Clericus
Keyword(s):  
Species Richness ◽  
Management Practices ◽  
Diversity Index ◽  
Residue Management ◽  
Pitfall Traps ◽  
Central Chile ◽  
Post Harvest ◽  
Clear Cutting ◽  
Randomized Design ◽  
Harvest Residue

The aim of this work was to study the effect of post-harvest forestry residue management practices on the epigeal coleopterans diversity and abundance in a 1-yr old Pinus radiata plantation. Approximately 25-yr old P. radiata plantation was available, which was harvested by clear-cutting at the beginning of 2010 in Constitución, central Chile. Three post harvest residue management treatments were installed in a fully randomized design in blocks: 1) a control, where residues were intact left; 2) residue removed (> 2.5 cm diameter); and 3) burned. The coleopterans were sampled in spring and summer, using linear transects with pitfall traps. The abundance and richness, and diversity index of coleopterans were determined. A total of 23 species of 13 families were obtained. Both in the springand summer, the treatment with residues left registered significantly greater abundance and species richness. In the residue management, the practices of intact leaving residue should be considered as the least impacting on diversity and abundance of epigeal coleopterans and is recommended for creating refugee areas to promote diversity of beetles in this area of study.

SEED YIELD RESPONSES OF THREE GRASSES TO POST-HARVEST STUBBLE REMOVAL

1980 ◽  
Vol 60 (3) ◽  
pp. 841-846 ◽  
Author(s):  
R. S. FULKERSON
Keyword(s):  
Seed Yield ◽  
Phleum Pratense ◽  
Yield Increase ◽  
Post Harvest ◽  
Panicle Number ◽  
Highly Correlated ◽  
Dactylis Glomerata L ◽  
Yield Responses ◽  
Seed Yields ◽  
Phleum Pratense L

The effect of post-harvest stubble removal dates upon the succeeding year’s seed yield of timothy (Phleum pratense L. ’Climax’), orchardgrass (Dactylis glomerata L. ’Frode’), and smooth bromegrass (Bromus inermis Leyss. ’Saratoga’) was investigated over four harvest years. The stubble was removed each year on 15 Aug., 15 Sept., 15 Oct., 15 Aug. and 15 Sept., 10 Apr., or left uncut. The experiments were conducted under conditions of adequate soil fertility. No stubble removal treatments increased the seed production of timothy. Orchardgrass seed yields were increased by all fall removal treatments but responded best to the 15 Aug. removal. Bromegrass responded to all stubble removal treatments but produced its highest seed yield from the 15 Oct. treatment. Seed yields declined with successive years until year 5 when timothy, and particularly orchardgrass, produced a yield increase. The interaction for years × stubble removal dates was significant only for bromegrass seed yield. Seed yield was highly correlated with panicle number in all species, with weight of seed in 25 panicles in timothy and bromegrass, and with 200-seed weight in timothy.

Dimethoate insecticide application seldom reduces silvertop incidence in grass seed fields on the Canadian Prairies

2021 ◽  
Author(s):  
J. J. Soroka ◽  
Bruce D. Gossen
Keyword(s):  
Seed Yield ◽  
Perennial Grass ◽  
Strong Support ◽  
Field Studies ◽  
Kentucky Bluegrass ◽  
Extensive Study ◽  
Residue Management ◽  
Grass Species ◽  
Insecticide Application ◽  
Grass Seed

Many arthropods have been reported (but none confirmed) as causal agents of sterile seed heads in perennial grass seed fields, known as silvertop or white head. Field studies to identify the arthropods that cause silvertop were conducted in five perennial grass species at seven sites in Saskatchewan, Canada over several years. The effect timing of insecticide application in spring – early, mid or late – and of post-harvest residue management – mowing, close mowing with straw removed (scalping), and burning – on subsequent arthropod populations, silvertop incidence and seed yield were assessed. Samples of grass tillers and sweep net collections were taken regularly, and the arthropods collected were identified to family level and counted. Arthropod populations from sweep samples varied among sites and dates in number and taxon composition, but no arthropod assemblage was consistently associated with silvertop in any grass species. Thrips were the most numerous arthropods on tillers at all sites. Insecticide application often temporarily reduced arthropod populations, but reduced silvertop incidence at only 1 of 15 site-years, and increased seed yield at only 1 of 17 site-years. Scalping or burning did not reduce silvertop incidence but often increased healthy seed head numbers and seed yield relative to mowing, the standard treatment. The majority of Kentucky bluegrass fields had extremely low seed yields unrelated to silvertop or arthropod levels. This extensive study, across a range of grass species and management regimes, provides strong support for the conclusion based on previous work that arthropod pests are not the sole cause of silvertop.

FORAGE YIELD AND QUALITY OF CULTIVATED PERENNIAL GRASSES HARVESTED AT THE EARLY HEADING STAGE

1975 ◽  
Vol 55 (1) ◽  
pp. 271-278 ◽  
Author(s):  
J. N. TINGLE ◽  
C. R. ELLIOTT
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Poa Pratensis ◽  
Kentucky Bluegrass ◽  
Phleum Pratense ◽  
Forage Yield ◽  
Cultivar Differences ◽  
Grass Species ◽  
Dry Matter Digestibility ◽  
Heading Stage

Fifteen grass species harvested at the early heading stage varied in dry matter yield and contents of crude protein, dry matter digestibility, Ca, K, Mg, Zn, Mn and Cu. Each parameter except Mg and Cu concentrations exhibited differences between cultivars within certain of eight species. Only timothy (Phleum pratense L.) had cultivar differences in dry matter digestibility. Crude protein contents varied between cultivars of meadow fescue (Festuca elatior L.) and Kentucky bluegrass (Poa pratensis L.). Differences between species were greater than between cultivars within species.

Effects of post-harvest residue management on labile soil phosphorus in a Pinus radiata plantation

1990 ◽  
Vol 38 (1-2) ◽  
pp. 13-25 ◽  
Author(s):  
M.A. Bekunda ◽  
P.J. Smethurst ◽  
P.K. Khanna ◽  
I.R. Willett
Keyword(s):  
Pinus Radiata ◽  
Soil Phosphorus ◽  
Residue Management ◽  
Post Harvest ◽  
Harvest Residue

Kernza intermediate wheatgrass (Thinopyrum intermedium) grain production as influenced by legume intercropping and residue management

2018 ◽  
Vol 98 (6) ◽  
pp. 1376-1379 ◽  
Author(s):  
C. Dick ◽  
D. Cattani ◽  
M.H. Entz
Keyword(s):  
Seed Yield ◽  
White Clover ◽  
Residue Management ◽  
Thinopyrum Intermedium ◽  
Grain Production ◽  
Sweet Clover ◽  
Melilotus Officinalis ◽  
Intermediate Wheatgrass ◽  
Residue Removal ◽  
Harvest Residue

Intermediate wheatgrass yielded 519 and 446 kg seed ha−1in years one and two after establishment. Autumn grazing increased seed yield compared with post-harvest residue removal or chopping. Inter-seeding legumes (alfalfa (Medicago sativa), sweet clover (Melilotus officinalis), and white clover (Trifolium repens) did not affect intermediate wheatgrass seed production.

Seed Yield of Kentucky Bluegrass as Affected by Post‐Harvest Residue Removal 1

1983 ◽  
Vol 75 (3) ◽  
pp. 549-551 ◽  
Author(s):  
R. D. Ensign ◽  
V. G. Hickey ◽  
M. D. Bernardo
Keyword(s):  
Seed Yield ◽  
Kentucky Bluegrass ◽  
Post Harvest ◽  
Residue Removal ◽  
Harvest Residue

scholarly journals The effect of some herbicides on seed yield of six grass species – Short Communication

2012 ◽  
Vol 38 (No. 1) ◽  
pp. 23-28
Author(s):  
J. Macháč ◽  
B. Cagaš ◽  
R. Macháč
Keyword(s):  
Seed Yield ◽  
Short Communication ◽  
Poa Pratensis ◽  
Dactylis Glomerata ◽  
Phleum Pratense ◽  
The Other ◽  
Grass Species ◽  
Festuca Rubra ◽  
Festuca Pratensis ◽  
Arrhenatherum Elatius

The tolerance to or phytotoxicity of selected herbicides and their impact on seed yield was investigated in six grasses grown for seed: Phleum pratense cv. Sobol (a), Festuca rubra cv. T&aacute;borsk&aacute; (b), Festuca pratensis cv. Otava (c), Poa pratensis cv. Slezanka (d), Arrhenatherum elatius cv. Medi&aacute;n (e) and Dactylis glomerata cv. Zora (f). All species were tolerant to Grodyl 75 WG (amidosulfuron 75%), (a) and (f) were tolerant to Grodyl plus (amidosulfuron 15 g/kg + isoproturon 600 g/kg) which was phytotoxic to the other grass species; all species were tolerant to Stomp 330 E (pendimethalin 330 g/l); Lintur 70 WG (triasulfuron 4.1% + dicamba 65.9%) was phytotoxic only to (c) while the other species were tolerant to it.

Sign in / Sign up

Export Citation Format

Share Document