Abeilles et Fleurs Mai 2010

This is the Table of Content of the Magazine Abeilles et Fleurs Mai 2010

For more information Please visit http://www.unaf-apiculture.info/abeilles_et_fleurs.htm

Production of tree seeds for Agroforestry: Seed sourcing

A seed source is a group of trees growing together from which one can collect seed for multiplication. This may be an identified number of trees in a landscape-farmland / natural forest or a group of trees from which you obtain seeds. A good seed source for trees should provide fast growing healthy, genetically diverse planting material. Selecting good seed sources results in high quality seeds and therefore superior end products. It is good to note that not every seed source will provide good quality seeds.

The genetic quality of the seed source is the decisive factor for the success of any tree planting programme hence seed sources have to be carefully identified and selected. The selection of seed sources is based on the assumption that the characteristics of the seed trees are likely to be transmitted to their offspring’s.

Farmers commonly plant trees on farms or community lands to grow products' that satisfy household needs and market demands. Tree seed, a key input that determines the success of any tree planting activity, is often in short supply. Smallholders and NGOs collect or produce most of the seed used in their tree planting programs. Unfortunately, experience shows that smallholders and NGOs have limited knowledge concerning proper tree seed collection and handling procedures. As a result, most of the seed collected by smallholders and NGOs is of questionable genetic and physical quality.

Vegetative tree propagation in Agroforestry

This technology describes the various stages in the vegetative propagation of trees (from tree nursery management to cuttings, grafting, and layering). It is targeted at helping field technicians and nursery managers active in tree propagation research or development.
The concept of vegetative propagation is that an exact copy of the genome of a mother plant is made and continued in new individuals. This is possible because plants have meristematic, undifferentiated cells that can differentiate to the various organs necessary to form a whole new plant. A piece of plant shoot, root, or leaf, can therefore, grow to form a new plant that contains the exact genetic information of its source plant.
Vegetative propagation aims at the identical reproduction of plants with desirable features such as high productivity, superior quality, or high tolerance to biotic and/or abiotic stresses, and as such, plays a very important role in continuing a preferred trait from one generation to the next

Seed propagation of Allanblackia spp.

This technology describes the various processes of propagating the seeds of Allanblackia..

Allanblackia seeds do not germinate easily. The use of growth promoters to break dormancy has been explored, but does not promote seed germination. The storage of fruit for 6 weeks before seed extraction and/or removal of the whole testa do however enhance germination. Incubation of coatless seed (seeds with testa removed) in black or transparent plastic bags also enhances germination, and this method is widely used in West and Central Africa.

Following the steps described should lead to good quality root and shoot development.


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