advantages and disadvantages of seeding method
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Direct Seeding
Direct seeding for revegetation
'Direct seeding' means applying seed directly to the site where plants are wanted.
Direct seeding at a glance
Advantages
Disadvantages
Critical factors
Methods
Direct seeding references (33KB pdf) [Expired]
Direct seeding at a glance
Advantages of direct seeding
Disadvantages of direct seeding
Critical factors for direct seeding
Climatic conditions
Choosing the correct species for the site, region and purpose
Obtaining viable seed and treating if necessary
Preparation of a good seed bed
Controlling weeds
Sowing at the right time
Sowing at the right depth
Direct seeding methods
Direct seeding has several advantages:
Areas can be revegetated quickly and cheaply
Seeds cost less than seedlings
Seed is easier and cheaper to transport and store than seedlings
Seeding requires less time and labour than seedlings
A mixture of trees, shrubs and groundcovers can be sown at the same time. The different rates of germination mimics natural regeneration
The mixture of tall, medium and small species can make a more effective windbreak
Direct seeded plants tend to have better root growth and are therefore more prepared for climatic extremes
More plants may germinate in the years following sowing
On farm machinery can be used to prepare seed beds. This removes the need to use specialised seeders.
Disadvantages of direct seeding include:
Less reliable establishment than for seedlings on some sites and across seasons. Not as suited as seedlings to deep, non-wetting sands or heavy textured soils
There is a requirement of some species for a special seed treatment before sowing
There is a low survival rate of viable seed
When a mixture of species are sown, there are limits to the number of herbicides that can be used for weed control
It often takes 9 to 12 months to properly see the results of a direct seeding project, with additional plants sometimes geminating in the second season.
Critical factors for direct seeding. Climatic conditions
Favourable rainfall is very critical for direct seeding success
The areas best suited to direct seeding have a reliable, moderate to high rainfall without extremes of temperature
Successes in low rainfall zones have generally been in the above average rainfall years. Time of sowing, site preparation, weed control and species selection is critical for success in low rainfall areas.
Choosing the correct species for the site, region and purpose
In general, plants which grow naturally in the same conditions have the greatest chance of success
Using a variety of species allows for differences in germination rates and soil types, and creates a mosaic of habitats for wildlife.
Obtaining viable seed and treating if necessary
Seed can be bought from commercial seed merchants or collected
Efforts should be made to obtain seed from the immediate area to preserve the local provenance, or variation, within each species
The seeds of many native plant species require special treatment to encourage germination
Answer:
Direct seeding has several advantages:
Areas can be revegetated quickly and cheaply
Seeds cost less than seedlings
Seed is easier and cheaper to transport and store than seedlings
Seeding requires less time and labour than seedlings
A mixture of trees, shrubs and groundcovers can be sown at the same time. The different rates of germination mimics natural regeneration
The mixture of tall, medium and small species can make a more effective windbreak
Direct seeded plants tend to have better root growth and are therefore more prepared for climatic extremes
More plants may germinate in the years following sowing
On farm machinery can be used to prepare seed beds. This removes the need to use specialised seeders.
Disadvantages of direct seeding include:
Less reliable establishment than for seedlings on some sites and across seasons. Not as suited as seedlings to deep, non-wetting sands or heavy textured soils
There is a requirement of some species for a special seed treatment before sowing
There is a low survival rate of viable seed
When a mixture of species are sown, there are limits to the number of herbicides that can be used for weed control
It often takes 9 to 12 months to properly see the results of a direct seeding project, with additional plants sometimes geminating in the second season.
Less reliable establishment than for seedlings on some sites and across seasons. Not as suited as seedlings to deep, non-wetting sands or heavy textured soils
There is a requirement of some species for a special seed treatment time. The different rates of germination mimics natural regeneration
The mixture of tall, medium and small species can make a more effective windbreak
Direct seeded plants tend to have better root growth and are therefore more prepared for climatic extremes
More plants may germinate in the years following sowing
On farm machinery can be used to prepare seed beds. This removes the need to use specialised