Methods of Seed Collection

Seed Collection

Despite the fact that the phrase “seed collecting” is commonly used, it should be highlighted that the fruits are virtually always gathered from the trees. In some species, the seeds are removed and the fruits are thrown only afterwards; in other species, seed extraction is skipped and the fruits are seeded in the nursery with one or more seeds.

Fruit collection may be done using a wide range of methods and equipment, and the decision is based on a number of parameters that, according to Robbins et al. (1981), can be stated as follows:

  • The size and number of natural dispersion units, as well as the units that can be gathered easily by humans. When there are 1–3 big seeds within a dehiscent or indehiscent fruit (e.g. Aesculus, Tectona), the easiest way to collect them is to wait for the seed or fruit to fall naturally and gather them off the ground. At the opposite extreme, collecting seeds from Adina cordifolia fruiting heads at 200 per kg is the only practical means to harvest them; at 11 million per kg, collecting them after dispersal would be impossible (Campbell 1980).
  • Fruit characteristics include size, quantity, placement, and distribution; peduncle resilience to shaking, tugging, breaking, or cutting; and the time between ripening and opening.
  • The diameter, form, and length of the bole; the thickness of the bark; the shape of the crown; the size, angle, density, and resistance to breaking of branches; the density of foliage; and the depth of the crown are all characteristics of the tree.
  • Stand characteristics include tree distribution and stocking (isolated trees, open or dense stands), and understorey and ground vegetation density.
  • Slope and accessibility are two site characteristics.

Methods of Seed Collection

Following are the important methods are of Seed Collection:

a) Seeds from Standing Trees:

Seeds are collected from specified standing trees using bomboo hooks or by skilled labourers who ascend and gather the seeds.

b) Seeds Collected from Fallen Trees:

In addition to collecting seed during routine falling operations, specific felling of trees for seed purposes, such as Terminalia tomantosa, Tectona grandis, and Eucalyptus spp., may be carried out. The disadvantage of having a specific sense is that trees are destroyed throughout the harvesting process, and only the best trees need to be cut down.

c) Collection from the Ground Flour:

Ground collection of natural seed fall is done for species such as Gamrelir arbooreia, Shorea species, Mangifera, Azadta, and Tamirendus that produce enormous heavy seeds or fruits that typically fall to the ground and may be collected by spreading tarpaulins or polyethylene sheets under the tree.

d) Lopping of Branches:

Some of the seed producing branches are chopped down via lopping, which involves strategically cutting the branches without injuring the tree, by climbing directly on trees. Babul (Acacia nilotica), Delbegiaues, and Bahunia, for example.

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