The Rubber Clone Structure is an official document issued by the Vietnam Rubber Group (VRG).
Its main purpose is to increase latex yield, ensure appropriate immature period duration (KTCB), and enhance the regional adaptability of rubber clones across Vietnam’s diverse growing zones.
1. Why Is the Rubber Clone Structure Important?
Table of Contents
The Rubber Clone Structure serves as a critical guideline for choosing rubber varieties suited to each ecological region.
Each recommended clone must meet three key criteria:
-
High latex yield
-
Reasonable immature period (KTCB)
-
Adaptability to regional conditions
In other words, recommended rubber clones must not only yield well and grow strongly but also withstand specific environmental constraints unique to each growing region.
2. Regional Limiting Factors Affecting Rubber Cultivation
Each major rubber-growing region in Vietnam faces its own set of natural challenges:
-
Southeast Region: Powdery mildew, leaf fall during the rainy season, and local drought in poor soils.
-
Central Highlands: Long dry seasons, frequent winds, and low temperatures.
-
South-Central & North-Central Coasts: Poor soils, irregular rainfall, typhoons, and prolonged wet seasons restricting tapping.
-
Northern Mountainous Region: Cold stress (frost damage) and challenging terrain.
To optimize productivity, each region is divided into three subzones based on suitability:
A – Highly suitable, B – Moderately suitable, C – Marginally suitable.
3. Clone Planning within the Rubber Clone Structure
The VRG’s clone classification is divided into three main categories:
| Table | Description | Proportion of new/replanted area |
|---|---|---|
| Table I – Major Production Clones | Widely cultivated, proven clones | ~80% |
| Table II – Medium-Scale Production Clones | Promising clones under broader testing | ~15% |
| Table III – Experimental Clones | New clones under limited trials | ~5% |
The focus of this document is on Table I clones, which represent the primary varieties for mass planting across Vietnam.
Historically, the most popular rubber clones in Vietnam have all originated from VRG’s officially issued clone structures — a testament to their reliability and field performance.
4. Decision No. 250/QĐ-HĐQTCSVN (October 26, 2021)
On October 26, 2021, the Vietnam Rubber Group (VRG) officially issued Decision No. 250/QĐ-HĐQTCSVN, promulgating the Rubber Clone Structure for the 2022–2026 period, with orientation toward 2030.
This framework aims to:
-
Sustainably improve latex productivity and quality;
-
Shorten immature phase duration (KTCB);
-
Enhance clone diversification;
-
Ensure regional ecological balance for long-term rubber industry development.
5. Regional Subzone Classification
Subzone A – Highly Suitable
-
Optimal soil (Grade I) and rainfall (1,800–2,500 mm/year).
-
Pests and diseases only occur at light to moderate levels.
-
Typical areas: Bình Dương, Bình Phước, and other fertile regions of the Southeast.
Subzone B – Moderately Suitable
-
One of three main factors (soil, rainfall, or disease) is less favorable.
-
Example: Soil Grade II or rainfall <1,800 mm/year (e.g., Hòa Bình, Bà Rịa, parts of Đồng Nai), or >2,500 mm/year (Yên Bái, Hà Giang).
-
Disease pressure can be moderate to heavy.
-
Subzone C – Marginally Suitable
-
Two or more unfavorable factors (e.g., poor soil, extreme rainfall, or high disease intensity).
-
Typically: Soil Grade III, altitude >650 m, rainfall outside the optimal range, or areas frequently affected by severe pests and diseases.
-
6. Average Latex Yield of Popular Rubber Clones
| Clone | Average Yield (tons/ha/year) | Notes |
|---|---|---|
| RRIV 209 | 3.0 | High yield, excellent stability |
| RRIV 114 | 2.5 | High early yield, short immature phase |
| RRIV 103 | 2.0 | Steady yield, good adaptability |
| RRIV 106 | 2.2 | Balanced productivity, widely planted |
| PB 235 | 1.2 | Older clone, low yield, mainly for timber |
7. Conclusion
The Rubber Clone Structure (2022–2026, Orientation to 2030) is a vital technical guideline ensuring that Vietnam’s rubber industry continues to thrive sustainably.
By adopting region-specific clones, farmers can:
-
Maximize yield and economic returns,
-
Minimize disease and climate-related risks, and
-
Maintain long-term plantation health and productivity.
For advice on selecting the best clones for your region, please contact your local VRG or RRIV representatives, or visit GiongCaoSu.com for free expert consultation.