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MWV Corp May 2015 Availability of short fiber near the mill Cost - - PowerPoint PPT Presentation
MWV Corp May 2015 Availability of short fiber near the mill Cost - - PowerPoint PPT Presentation
Peter W. Hart, John Johnson, Ricardo Paim MWV Corp May 2015 Availability of short fiber near the mill Cost of long hauling short fiber to the mill Texas mill uses about 2/3 short fiber Southern Brazil has significant
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E. benthamii
E. amplifolia E. macarthurii E. viminalis E. dorrigoensis Selected land races of E. camaldulensis
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E. globulus E. nitens E. Gunnii E. dalrympleana
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General bulk seeds show significant variation
Low yield volumes per hactare
Up until 2011 limited seed availability
Only enough to supply 500 hectare /yr program
Currently enough for about 20X more.
Poor uniformity Inferior pulp physical properties
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E. benthamii ideally suited for genetic
manipulation through selective breeding
Half-sibling block plantings starting this year
Expect significant gains in volume, improved cold
tolerance, improved plantation uniformity
Next round plans to look at
Specific gravity Fiber yield
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Want enhanced growth, improved fiber yield
and quality, improved disease and insect tolerance…along with cold tolerance
Currently limited by
Availability of desirable flowering mothers, pollen
parents
Cumbersome import/export laws for plant material
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Have typically been opportunistic.
Mother trees from in-door breeding orchards Randomly obtained pollen from various sources
Crosses to date in greenhouse and field trials in
SE United States include
E. grandis X E. benthamii E. dunnii X E. benthamii E. benthamii X E. dunnii
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The US program has greatly benefited from
guidance and training from our Brazilian brethren.
Rigesa has provided most of the bulk production
seed through their orchards or through their commercial contacts
Training in seedling production, field test design,
plantation establishment and culture.
Interspecific efforts relied heavily upon Rigesa
breeding facility, staff, and outside contacts.
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Southern US supplies regular, multiple, and
varied cold/frost events
Early and late season frosts Rapid temperature drops Prolonged freezing conditions Freezing rains Snow
Families screened in US may be perfect fit for
similar, higher altitude regions in southern Brazil and other areas in South America.
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One site 1 yr old trees completely encased in ice!
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For E. benthamii
Trees snapped at bifurcations Some foliage loss Slight delayed start to early spring growth
Some other species completely killed
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Need to evaluate both High Yield and
Bleachable Grade Pulps
In Brazil (high yield) use as a pure species In Texas (bleachable grade) use as a partial
replacement of mixed southern hardwoods
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2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 350 400 450 500 550 600 650 700 Tensile Kgf Canadian Standard Freeness mL Dunni - Kappa 15.3 Benthamii - Kappa 15.3
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Lab Cook Results
Yield slightly higher Screened Rejects Lower
As a result of favorable lab studies, two mill scale trials were conducted using E. macarthuri grown in South Carolina – one w/ 42% sub, other w/ 33% sub – No changes in standard cooking or bleaching procedures required.
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Over 4050 hectares planted in Texas area Two Brazilian seed orchards providing half-sibling
families to be planted as family blocks Fall 2015 (E. benthamii top performers)
Texas field trials established for
E. amplifolia E. grandis X benthamii E. dunni X benthamii
Several pulping studies have been performed Future genetic improvements being planned and
evaluated
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