Pinus merkusii transgenic forest

Decision No. 153 / QD-UBND approving the Program for Forest Seedling Development in Nghe An Province up to 2020 specified the tasks to be implemented period 2010-2020, including: supplementing and selecting natural stands and well planted forests in order to transform into 217 ha of seedling forests, of which 129 ha developed seedling forest, 98 ha of new seedling forests. This transgenic forest will produce and supply enough for the period 2009-2020. The scope of implementation: 19 districts, including Nghi Loc district with good quality of Pinusmerkusii plantation forest, suitable for the purpose of transforming into the transgenic forest.

Under the framework of the project "Development of Special Economic Forest Species in the period 2011-2020", Institute of Ecology, Pinus merkusii plantation in Nghi Van Commune, Nghi Loc District, Nghe An Province was established for the construction of transformer seedlings in order to quickly and promptly provide good quality seed for local people to contribute to The system of forest seed sources in Nghe An province is in line with the market mechanism and integrated with the national seedling network. In 2015, 04 hectares of Pinus merkusii forest at plot number 7, block 3, sub-zone 962 of Nghi Van commune, Nghi Loc district, Nghe An province was recognized as a transgenic forest in accordance with Accreditation Certificate No. 3501 / NGLN dated 31/12 / 2015 of Nghe An Department of Agriculture and Rural DevelopmentForests and Environment in collaboration with the management board of Nghi Loc Protection Forest has investigated and selected a stand of

1. Information on seed sources

- Source: Plantation forest

- Average age / planted year: 1998

- Source of initial seeds: Planting of seedlings

- Area: 4ha

- The growth indicators:

+ Average diameter: 20.2 cm

+ The average tree height (upper anopy): 9.3 m

+ The average tree height (under anopy): 4.6 m

+ Canopy diameter: 5.0 m

- Initial density: 800 trees/ha; Present density: 450 trees/ha

- The result of flowering, seedling: All the trees in the stand have flowers, fruits. Average fruits yield is 500 - 1000 g/tree.

2. Summary of applied silvicultural measures

a, Shrubs, grasses cleaning:

- Procedure:

Cleaning the shrubs, grasses by the comprehensive method.

- Method:

Using manual methods, cutting off all weeds and other grasses that affect the growth of seedlings (far from seedling tree ≥ 10m).

b. Forest seedling transformation

Selected remaining trees are the best quality trees in the transition forest area. In particular, trees level I are the ones with the best yields in the stands as well as diameter, height, and morphology; trees level II are those with average yield, average diameter and height compared to those in the stand; trees level III are those with lower pod yields than the average of stands, with diameter and height growth as well as other morphological features that are below average.

- Initial density: 800 trees/ha

- Final density: 450 trees/ha

- First thinning (according to the designing profile) with the intensity of 43.7%, the implementation time is in December 2013. The density after thining: 450 trees/ha.

The thinned trees are pinched, curved, topped, poorly cut and the trees are not for the purpose of the transgenic forest.

+ To be close to the foot (15-20cm from the ground), the direction does not affect the remaining trees (control the trees along with the contour line, avoid slope). After cutting down the tree, cut the branches first, cut the latter and then transport out of the forest.

+ After cutting, the logs must be removed from the forest stands.

+ There are three requirements for forest cutting: Do not cut two adjacent trees in one time, creating conditions for the canopy to have sufficient space for growth and development.

c. Tending the forest after thining:

+ Clean the grasses and shrubs completely

+ Processing the data and making the transgenic forest profiles.

e. Build anti-fire belts

Construction of an anti-fire road with a width of 6m surrounding the forest. Carrying out the removal of easy to burn species, keep other plants, hard-to-burn plants to prevent forest fire and clear fire materials.

f. Methods to protect seedling forest: