Docynia indica transgenic forest

The research on theDocyniaindia mainly describes morphology, distribution, ecological characteristics. The previous results were very limited and focused only on some techniques of the pure plantation, research on seed selection and planting techniques, especially intensive forestation techniques for Docynia india planting was less attention. Therefore, the implementation of the transformation of good quality stands with silvicultural engineering solutions to improve the yield, quantity, and quality Docynia india nursery, provides to market is necessary.

In the implementation of the project "Development of Special Economic Forest Species period 2011-2020", Institute for Forest Ecology and Environment has coordinated with Mu Cang Chai Protection Forest Board to provide staff, labors for investigating, making financial estimating for constructing and management. The use of technical procedures: clearing of grass and shrubs, thinning... to implement the conversion of 5 hectares ofDocyniaindia stands at plot number 34, block 8, sub-area 351, Nam Khay commune, Mu Cang Chai, Yen Bai Province. In 2015, the forest stands were recognized as transgenic forest in accordance with Decision No. 174 / QD-SNNPTNT dated 18/11/2015 of the Department of Agriculture and Rural Development of Yen Bai province.

Based on the results of the implementation of silvicultural techniques in the transgenic forest, the Institute for Forest Ecology and Environment summarized the actual resultsas follows:

1. Information on seed sources

- Source: Natural forest

- Forest age: Young forest

- Source of initial seeds: Planting of seedlings

- Area: 5 ha

- The growth indicators:

+ Average diameter: 16.32 cm

+ The average tree height (upper canopy): 5.18 m

+ The average tree height (under canopy): 2.34 m

+ Canopy diameter: 4.09 m

- Initial density: 360 trees/ha; Present density: 260 trees/ha

- The result of flowering, seedling: All the trees in the stands have flowers, fruits. Average fruits yield is 44.4 kg/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 tre ≥ 10m).

- Implementation time: 2013

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.

- First thinning (according to the designing profile) with the intensity of 27.8%, the implementation time is in December 2013. The density after thining: 260 trees/ha.

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

- Cutting technique:

+ To be close to the foot, the falling direction does not affect the remaining trees

+ 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, dig around the tree foot with a diameter of 1.5m.

+ Processing the data and making the transgenic forest profiles

+ Implementation time: 2014

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:

Establish a sign at the pathways going into the forest area, where regular inspections of pest and disease prevention, human and animal encroachment of the converted forest.