bamboo for land restoration

I had the great pleasure of participating in the seventh future environmental trends conference organized by Institut Veolia in Washington DC on 29 and 30 May 2014.  The conference was titled: “Ecosystems, economy and society: how large scale restoration can stimulate sustainable development”.  Andrew Steer from the World Resources Institute asked if it was time for a “Revolution for Conservation” as there is 2 billion hectares of unproductive land around the globe.  Dennis Garrity from the World Agroforestry Centre (ICRAF) had made a plea the previous day for a green revolution for Africa, promoting agro-forestry throughout the continent.

Bamboo could play a pivotal role, not only in Africa, but in many other parts of the world where land has been left unproductive, and I was pleased that I had the opportunity to present my thoughts and INBAR’s experience.  Below is the text of my speech:

Most bamboos are giant grass species, which occur throughout the tropical and subtropical belts. While bamboo is often associated with the Asia-Pacific Region, there is large area of native bamboo in Africa and in Latin America. There are more than 1400 species of bamboo, and they range from relatively small plants to giant culms. Bamboo naturally grows in between other species in a mixed forest, although some of the industrial bamboo plantations in China are mono-culture. Bamboo requires rainfall of at least 500mm per year, but thrives in wetter conditions and different species are adapted to their local conditions, based mainly on rainfall, temperature and soil conditions.

Bamboo grows very fast. In spring or the rainy season, new shoots appear above ground, which reach full height and diameter in several months. The growth rate can reach more than 1 metre per day. Once the bamboo stems (culms) have reached full height, they will not become bigger, but they will need 3 to 5 years to reach maturity, when they can be cut for use. As bamboo is a crop, it can be cut year after year, and new shoots will re-appear to replenish the stock of culms.

There are in general terms two types of bamboo – clump bamboo (sympodial) usually in tropical areas and running bamboo (monopodial) in subtropical areas. A third variety is a hybrid between the two. Clump bamboo grows from a central root mass, and does not spread. Running bamboo has rapidly growing rhizome and root systems, which can grow 1-5 metres in a year.

The rapid growth and the strong root systems make bamboo particularly suited for soil protection. It is reported that a single bamboo plant can bind up to 6m3 of soil and research in China showed that soil erosion in a bamboo plantation is 4.7 times lower than in adjacent sweet potato cropland.


Dr Lou Yiping from INBAR at soil erosion study site in Datong village, Chishui County, Guizhou province – China

Rwanda has a national bamboo policy that specifies the objective to reduce soil erosion, siltation of rivers and water bodies by growing bamboo on slopes and buffer zones along riverbanks and lakeshores. Together with the ministerial order on buffer zone management, Rwanda has a practice to plant bamboo along ten (10) and five (5) metre corridors along big rivers and small rivers.

Similar arrangements are in place in other countries. For example, Dendrocalamus hookeri was planted along the Mahaveli river in Sri Lanka, and bamboo is also planted along rivers in Brazil, China and other countries.


Dendrocalamus hookery planted along Mahaveli River in SriLanka. Photo by Dr Shantha Ramanayake

The Philippines National Greening Policy states: Bamboo and mangrove species shall also be tapped as reforestation crops, particularly in river banks and coastal areas, to control soil erosion and as buffers against wave action.” One project in Las Pinas is planting bamboo along 58 kilometers of its riverbanks, using the Philippine giant bamboo, scientifically known as Dendrocalamus asper and the Bambusa blumeana or what is commonly known in Filipino as kawayan tinik.

Bamboo is also used to help restore degraded lands. In India, INBAR worked with a local NGO Utthan in Allahabad, where a large area of land had been used for decades as a source of clay for brick-making. Introduction of pollution control measures and changes in rural development resulted in the collapse of the brick-making industry leaving local communities destitute. Bamboo was used in a pilot project of just over 100 hectares in 1997 and after a number of years, the red earth had been changed into a green oasis.

The pilot project ended some ten years ago, but the planting efforts have not ceased. In fact, the result of the initial investment has been that more than 85,000 hectares of degraded land have now been made productive again, helping 90,000 local households. The initial project was so successful that Utthan was awarded the UDS1million Alcan Prize for Sustainable Development in 2007. The economic benefits are enormous, and indirectly, the bamboo cultivation has resulted in local energy provision, better living conditions, fodder for livestock and poultry, a source of useful materials and therefore income for local communities.

Other villages in India have copied the successful approach in Allahabad, and 3 hectares of barren sodic soils in Madampoondi, Villupura, have been turned into a green forest in one year. Similarly, bamboo is used as a means to help restore eroded slopes in Chili and in Brazil.

In Ghana, tests were carried out to assess the suitability of bamboo for restoring degraded mined areas in the Ashanti region, and providing economic opportunities for the surrounding local communities. Some reclaimed mining sites were used in the research, and some areas that were untreated former mining terraces.After ten months, the space between individual plants had almost closed, and it was difficult to measure individual plants. The survival rate of all species was 95%.  Not surprisingly, native species were very suitable, but also an exotic species was considered particularly well suited.

In China, large areas of forested land were cut during the last century in order to make space for agricultural development. This has turned out to be a challenge in several areas, and more recent policies of Government have promoted the conversion of marginal agricultural sloping land into forest land. In those provinces where bamboo is the major native species, the restoration has been done with bamboo species.In 1999, the Central government set up piloting sites in Sichuan, Shaanxi and Gansu provinces to seek the pathway for conversion of farmland to forest and grassland countrywide.

From 1999 to 2011 the programme has been adopted in 2,279 counties in 25 provinces, involving 32 million rural household and 124 million farmers. The total conversion area is 28.94 million ha, including a) conversion into forest 9.26 million ha, b) plantation of bamboo and trees in waste land and mountains 16.98 million ha and c) mountain enclosure for forest rehabilitation 2.7 million ha. The total financial input from Central government during this period has been 438.5 billion Yuan, which is nearly 70 billion US Dollars.  About 12 bamboo species such as Phyllostachys pubesence and Dendrocalamus farinosuswere selected as priority species by farmers in 13 provinces where bamboo was used in the reforestation programme.

A case study in Guizhou Province covered a total plantation area of 38,466 ha of which 30,066 ha was planted with bamboo, mainly Dendrocalamus farinosus and Bambusa rigida. Before the planting started the slopes were covered with abandoned farmland, and after 8 years the area is a lush bamboo forest

In Sichuan Province, bamboo was used to restore the fragmented habitat of the Giant Panda. Due to agricultural expansion, unplanned landuse and development pressures, the former bamboo habitat of the Giant Panda has been fragmented and reduced. Grain for Green project and a landscape restoration programme in response to the 2008 earthquake provided resources to re-engineer the landscape and restore the bamboo habitat.




The two photos above show the landscape around Xiakou village, Yaan County, Sichuan, China before planting in 2002 and afterwards in 2010. Photos by Yang Hanmei.

Bamboo has more recently also been planted as a means to create a carbon sink. Bamboo absorbs as much CO2 as a woody tree, and research in China has indicated that in comparison bamboo is a better CO2 sink than Chinese fir- one of the fast growing sub-tropical tree species. The China Green Carbon Foundation planted 47 Hectares of barren land in Lin’an County, Zhejiang Province, China in 2007 with Phyllostachys pubescens. After just five years, the site was covered in bamboo, and Alibaba company paid USD30,000 on 1 November 2011 to buy the 8155 ton CO2equivalent generated by the plantation. As bamboo is a grass species and not a tree, planting bamboo will help countries reach their REDD+ targets, while harvesting bamboo does not contribute to deforestation.

Cut bamboo can also play a role in erosion control and landscape restoration. In Ethiopia, local research found that check dams constructed with a frame made of local bamboo mats are much cheaper than gabion check dams. The bamboo ones work best in small gullies in the uppermost parts of the catchments. In the main valley, where there is risk of violent flash floods, the bamboo check dams cannot be used.

Another interesting example of landscape restoration with bamboo comes from Thailand. Along the coast of Kok Kham island, bamboo breakwaters and bamboo fencing have been used to reverse coastal erosion. 3″ diameter and 5m length bamboo (Dendrocalamus asper) culms were used to build walls on the coastal mudflats, up to 4m above ground. The bamboo structure dissipates the wave energy and reduces wind velocity near the coast, and causes deposition of silt with an average 0.46m/year while there is loss of sediment in the neighbouring area without similar structures. The deposited sediment has a lot of food nutrient which is suitable for recovery of mangroves, and the bamboo walls therefore enable mangrove restoration to take place more effectively.


Mangrove protection by bamboo fences in Kok Kham Thailand

All this illustrates how effective and useful bamboo can be in repairing degraded land and restoring ecosystem functions. The added advantage of including bamboo in restoration initiatives is the fact that it can be used for many purposes. There are reportedly 2000 different uses of bamboo products, ranging from pulp and paper to textile, from food to a source of renewable energy, and bamboo is a versatile construction alternative to wood.


INBAR garden illustrates bamboo and rattan benefits

I wrote last week about the opening of the Qingdao Horticultural Expo, and the INBAR Garden, which highlights the role bamboo and rattan play for horticultural purposes. In Europe and the North America, bamboo is often used as a garden plant or even as interior decoration. However, in other parts of the world, bamboo has many more uses.

In his speech during the opening of the Qingdao Expo last week on 25 April, Tim Briercliffe, Secretary General of the International Association of Horticultural Producers, AIPH, stressed the role of plants and trees in urban planning. He emphasised that research has shown that a green city is a healthier city than an urban environment without plants and trees. Urban trees and plants provide shade and help to cool the micro-climate, they absorb pollution and generate oxygen, and they attract birds, bees and butterflies. In tropical areas, bamboo could pay a key role in urban planning, as it grows fast, it maintains is foliage throughout the year, and it could provide additional resources when cut. INBAR had a visit recently from a group of town planners and architects from HongKong, who are looking into ways and means to use bamboo in their plans, and they are not the only ones.  The following photo is taken in Chengdu. southern China, where bamboo is used to create a shade corridor in a park.

Bamboo corridor in Wangjianglou Park, Chengdu, Sichuan, China

Bamboo corridor in Wangjianglou Park, Chengdu, Sichuan, China

The INBAR garden at the Qingdao Expo is a showcase for many of the uses and benefits of bamboo and rattan, and as the EXPO will remain open to the public for 6 months, I hope that many people will visit the INBAR garden to see first-hand what an amazing species these two plants are. The garden has 23 different bamboo species from all over China, although Qingdao is towards the northern margin of the natural range of bamboo. Unlike some of the other gardens that are designed as temporary structures, bamboo can remain in the Qingdao EXPO forever, and we are discussing the possibility of having a permanent presence. The different species are an illustration of the wealth of bamboo, and different species have different uses. Particularly striking bamboo for horticultural and decorative purposes is the turtleshell bamboo (Phyllostachys heterocycla), but we also show the typical Chinese moso bamboo (Phyllostachys pubescence) and the giant bamboo from Yunnan Province (Dendrocalamus sinicus) in the south of China.

Qingdao Expo INBAR garden giant bamboo and generalview

The garden designers constructed a traditional bamboo house, to show how round pole bamboo can be used in building sturdy structures. Such bamboo houses are earth-quake proof, as the bamboo will respond to movement, and the joints are all natural without nails or bolts. INBAR has promoted such structures in Sichuan after the 2008 earthquake, and is currently working with partners in Bhutan to enhance building practices there. We are also working with partners in South America to develop affordable, modern bamboo housing examples, and we showcased some of the recent work at the World Urban Forum in Medellin earlier this month.

The path through the INBAR garden is made from decking of engineered bamboo. Bamboo has been used to make indoor parquet flooring for 30 years, and there are many ways to do so, but the use of bamboo for outdoor decks and terraces is a relatively new development. The bamboo planks in the INBAR garden are manufactured with physical treatment, which means less pollution compared to chemical treatment. Manufacturing is a mechanical process of heat and pressure, and the outdoor planks are guaranteed for more than 10 years.

Qingdao Expo INBAR garden stream and rattan bridge small

Manufacturers in the USA, Australia and Europe also produce such outdoor bamboo materials, often from raw materials that are imported from Asia.   The 2012 trade flow of bamboo and rattan products from Asia to Europe was USD 420 million, 68% of the total export value from Asia to the World, and there is a large internal market in the EU of USD 164 million. This is a market that comprises import of raw materials or partially finished products and export or internal trade of finished goods. Flooring is one of the examples.

There is a small stream in the INBAR garden. We have planted bamboo on the banks, and have used bamboo pieces to create small dams.   This aerates the water, and the bamboo on the banks stops soil erosion. The aim is to illustrate how bamboo could be used on larger scale to help protect the banks of waterways, and how constructed wetlands can help with water treatment. Rwanda has a legislation that calls for waterway bank protection by bamboo (10m buffer for riverbanks, 20m for lakeshores) and other countries have also recognised this potential. The concept of manmade wetlands for water treatment has been implemented in many places around the world, especially using reeds and aquatic vegetation, such as the papyrus swamps in Lake Victoria near Kampala in Uganda, but using bamboo is a new approach which can be developed for small communities without mechanical waste water treatment facilities. And by introducing bamboo, we open up the possibility for the local communities to develop new economic activities.

INBAR does not only represent the producers and users of bamboo, but we also a responsible for the sustainable management of rattan. The garden has large bridge and corridor made from rattan, to show how this plant can be used in design and construction. Rattan is mainly found in South East Asia and Central and West Africa. IBAR is discussing with the 10 ASEAN nations how we can develop together a more sustainable future for rattan, including appropriate management of natural resources, planting of rattan to restore depleted sources and assistance with international regulations regarding trade and economic development. I will be visiting the ASEAN Secretariat in Jakarta in a few days’ time, and I will be discussing the rattan programme with the Indonesian Ministry of Forestry.

Qingdao Expo Opening INBAR rattan bridge with people - small


Finally, we have constructed a building in our garden at the Qingdao Expo which houses some examples of the many household uses of bamboo and rattan. The building is totally made from bamboo and rattan, but the walls are not made from round bamboo poles. We have used strandwoven boards that can be used in any modern construction, and the ceiling is made from bamboo plasterboard. But, we have used some massive round bamboo poles as main supports for the roof structure, to illustrate how one can combine traditional building crafts with modern housing design and construction. The shape of the building is modelled on a sailing boat, and we have the flags of all 39 Members of INBAR flying from the stern.

Qingdao Expo INBAR pavilion with flags small

Inside, there are examples of traditional bamboo painting and calligraphy, but also some modern bamboo weaving products. We have both traditional and modern interior design pieces made from rattan and bamboo, and there are examples of bamboo-based textiles. A word about the textile made from bamboo. Currently, it is difficult to produce yarn from natural fibres, as the industry has not yet discovered an economic solution to lengthen the relatively short bamboo fibres. Most bamboo textiles are there produced from viscose, and this process involves the use of chemicals. However, bamboo viscose is not any worse than viscose made from other raw materials. What makes bamboo viscose environmentally friendly is the fact that the raw product – bamboo is a plant that does not require agro-chemical applications (although some farmers may add fertiliser to speed up growth), grows on marginal lands and slopes, needs little or no irrigation once established, and does not compete with foodcrops. Moreover, as it is a crop, bamboo can be harvested every year, after 3 to 5 years for reaching maturity.

In the bamboo house you can also find some traditional round bamboo and rattan furniture, produced through a very new patented technology that uses round bamboo for handmade high quality furniture. It does not crack, even during the very dry Beijing winter. In the bamboo house you can also find other bamboo products like a bamboo computer keyboard and mouse; a bamboo radio and a bamboo calculator; a selection of bamboo charcoal products, and more.

Qingdao Expo-traditional-furniture-in-INBAR-house

All-in-all, bamboo and rattan are versatile plants with an immense range of applications and uses. The INBAR garden does not explain the role of bamboo in CO2 sequestration and the fact that it absorbs as much if not more than comparable tree species. It does not talk much about the role of bamboo is restoring degraded lands and helping to bring unproductive soils back into life. It also does not show the important role of bamboo and rattan in biodiversity conservation, as the Chinese giant panda, the Gorillas in Eastern Africa and the Madagascar bamboo lemur all depend on bamboo in nature. And the INBAR garden is not able to present to you some of the ground-breaking research that is still taking place with regards to the production of ethanol and butanol, the potential pharmaceutical properties and chemical applications. But – the INBAR garden in the Qingdao EXPO shows a lot of bamboo and rattan aspects. If you have the chance, please go and visit!

Qingdao Expo INBAR garden sign (3) small