24/11/2025
High-density tea cultivation: Advantages, disadvantages and sustainable strategies
High-density tea cultivation is a modern development in the tea industry in Sri Lanka, aiming to achieve higher yields per unit area by increasing the density of planting trees compared to traditional cultivation. This method involves planting tea trees (Camellia sinensis) at a density of about 10,000-15,000 per hectare, which increases land use efficiency compared to the traditional planting of 5,000-7,000. The method was developed by the Tea Research Institute (TRI), and it plays a key role in improving the economic viability and sustainability of the tea industry. This article discusses the advantages, disadvantages, challenges and measures that can be taken to overcome them, along with TRI advice.
The main advantages of high-density tea cultivation are high yields and land efficiency. This method has the potential to yield 20-30% more than conventional cultivation, which is very important in a country like Sri Lanka, which has limited land resources. It also provides farmers or estate owners with increased income and allows for mechanization and modern management. According to TRI research, this method contributes to the sustainability of the tea industry as it makes efficient use of water, fertilizer and labor resources.
However, there are also many disadvantages of high-density cultivation. The density of trees leads to nutrient deficiencies, which increases soil erosion, and the risk of disease and pest infestation. Furthermore, it is a serious challenge for small farmers, as it involves high initial planting and maintenance costs. The quality of the tea leaves may decrease, and the use of chemicals can cause environmental pollution. According to TRI reports, these disadvantages can reduce long-term productivity, so balanced management is essential.
The main challenges of intensive cultivation include resilience to climate change and maintaining soil health. The hotter summers, dry spells and heavy rains affecting tea cultivation in Sri Lanka increase erosion and disease, and intensive cultivation further exacerbates these impacts. In addition, labor shortages and high production costs are also serious challenges, which, according to TRI research, threaten the sustainability of the tea industry. Integrated management strategies are essential to overcome these challenges.
Among the measures that can be taken to overcome these challenges are the use of Integrated Nutrient Management (IPM) and water management. Covering the slopes of the land to reduce soil erosion and improving the use of organic fertilizers can reduce nutrient deficiencies. The use of biological pesticides and regular environmental scanning are effective in reducing disease incidence. According to TRI advice, these measures provide an economic benefit to farmers, as they increase yields by 15-20%.
The guidelines issued by the Tea Research Institute (TRI) are fundamental to the sustainability of high-density tea plantations. TRI’s Advisory Circular No. PA 2 (2011) recommends the use of drought intervention strategies, particularly sprinkler irrigation systems, which protect the micro-environment of the trees. Furthermore, according to TRI research, the use of climate-adapted cultivars can help to increase disease and drought tolerance. These guidelines will help to minimize environmental impacts and increase income.
In conclusion, while high-density tea plantations are a powerful tool for the future of the tea industry in Sri Lanka, it is crucial to follow the TRI guidelines to balance their advantages and disadvantages. The sustainability of this system can be ensured by adopting integrated management strategies, taking into account climate change and environmental protection. This will pave the way for the economic resilience of the tea industry and improve the competitiveness of Sri Lankan tea in the global market.
