Ahora que las primeras de nuestras parcelas agroforestales están listos para apoyar la producción de frutales tenemos que ayudar a nuestros comunidades socios a seleccionar las especies / variedades a cultivar. Este es un negocio complicado, ya que tendrá que equilibrar a corto plazo frente a los beneficios a largo plazo con la toma de riesgos con la actualidad de alto valor y cultivos de moda que podría no conservar su demanda o precio en el futuro. Además hemos tenido la suerte de conseguir el apoyo de la fundación innocent para ayudar a nuestras comunidades con la producción de plántulas a través de la construcción de viveros robustos y la oferta de formación experto de Kew y horticultores locales.
Nuestra estrategia es hablar con expertos locales, consumidores potenciales y buscar en los mercados locales para identificar a una lista de una docena o más especies potenciales. A continuación vamos a preparar una lista de las ventajas y los riesgos asociados a cada especie, localizar las fuentes de semilla y comenzar a crecer un par de cientos de plántines de cada uno. Una vez que tenemos un “stock” de trabajo de plántines, luego presentaremos cada especie a las comunidades en una reunión comunitaria. Esto nos permitirá ayudar a decidir qué especies les gustaría cultivar en función de sus necesidades y deseos.
Siguiente es un listado preliminar de especies debajo consideración:
Now that the first of our agroforest plots are ready to support food and fruit production we need to start helping our community partners select what species / varieties to grow. This is a tricky business as they will need to balance short-term vs long-term benefits with taking risks with currently high value and fashionable crops which might not retain their demand or price in the future. In addition we have been very fortunate to get support from the innocent foundation to help our communities with the production of seedlings through the construction of robust nurseries and the provision of expert training from Kew and local horticulturalists.
Our strategy is to speak to local experts, potential consumers and look in local markets to identify a long list of a dozen or more species. Next we will prepare a list of the advantages and risks associated with each species, locate sources of seed and start growing a couple of hundred seedlings of each. Once we have a working ‘stock’ of seedlings we will then present each species to the communities at a community meeting. This will enable us to help them decide which species they would like to cultivate based on their needs and desires.
Below is the list of species currently under consideration
Apenas un año después de la plantación tenemos dos parcelas agroforestales que ya no necesitan ser limpiado. Han efectivamente ‘capturados’ sus sitios. Estos sitios son por los comunidades de Palacios y Motacusal. La siguiente etapa es convertir las en sistemas productivas, es decir iniciar a cultivar anuales y frutales en ellos. Mientras que es un proceso sencillo, hay un par de reglas básicas a seguir en función de si se están cultivando cultivos anuales (maíz, arroz, yuca, etc.) o árboles frutales. En ambos casos tenemos que podar los árboles de Inga para liberar el sitio y asegurar que los cultivos reciben suficiente luz.
Cultivos anuales. En el caso de los cultivos anuales es importante: 1) Podar los árboles de Inga, al mismo tiempo quese planta los cultivos anuales. Esto es porque una vez podado hay una ventana de crecimiento de cultivos de seis meses antes de que las ramas crecen de nuevo y una vez más capturan el sitio. 2) Sólamente se puede podar los árboles de Inga una vez que las ramas de callejones vecinos se tocan, en este momento se han desarrollado a un tamaño suficiente, por encima y por debajo del suelo, para apoyar los cultivos. Una vez los árboles de Inga podado es necesario dejar las hojas, ramitas y ramas menores cortado en los callejones agroforestales donde van a servir como mantillo / materia orgánico por el suelo. Las ramas más grandes se pueden tomar como leña.
Cultivos de frutales. En el caso de los árboles frutales no necesita podar a los árboles de Inga hasta que sus copas se tocan, o que están echando sombra excesiva a los frutales. Este último depende de la especie de frutal plantado y deben estar a la discreción del agricultor. Además, no es necesario podar a todos los árboles de Inga al mismo tiempo o eliminar todas las ramas: los árboles pueden ser podado según la necesidad para generar la sombra óptima para los frutales vecinos. Igual que en el caso de plantas anuales cuando se poda a los árboles de Inga las hojas cortadas, ramitas y ramas menores deben ser dejados en los callejones donde van a servir como mantillo. Las ramas más grandes se pueden tomar como leña. Continue reading Planificación de los primeros cultivos→
Barely a year after planting we now have two agroforest plots that no longer need weeding and have effectively ‘captured’ their sites. These are Palacios and Motacusal. The next stage is to make these agroforest systems productive, that is to start growing crops in them. Whilst a straightforward process there are a couple of basic rules to follow depending on whether you are cultivating annual crops (maize, rice, yucca etc) or fruit trees. In both cases we need to prune or pollard the Inga trees to release the site and ensure that the crops get enough light.
Annual crops. In the case of annual crops it is important to: 1) pollard the Inga trees at the same time as the annual crops are planted. This is because once pollarded there is a six-month growing window before the branches grow back and once again capture the site. 2) to only pollard Inga trees once the branches of neighboring rows are touching, this is when they have developed to a sufficient size, above- and below-ground to support crops. Once the Inga trees are pollarded the pruned leaves, twigs and minor branches need to be left in the agroforest alleys where they will serve as a mulch. The larger branches can be taken as fuel wood.
Fruit crops. In the case of fruit trees the Inga trees do not need to be pollarded until either their crowns are touching, or they are casting excessive shade on the fruit trees. The latter depends on the nature of the fruit tree being planted and should be at the discretion of the farmer. In addition, it is not necessary to pollard all of the trees at the same time or even to remove all of the branches: trees can be pollarded as needed and to the extent necessary to generate the optimum shade for the fruit trees. As in the case of annuals when the Inga trees are pollarded the cut leaves, twigs and minor branches need to be left in the agroforest alleys where they will serve as a mulch. The larger branches can be taken as fuel wood.
The synthesis introduces two concepts that were new to me: the first was the notion of the Amazon as a ‘Green Ocean’, the second that the Amazon functions as a biotic pump pushing ca 20 million tonnes of water into the atmosphere every day and in doing so drawing water vapour in from the Atlantic Ocean. The first idea of the Amazon as a Green Ocean is an important one as it gives a scale to the impact the Amazon has on the global climate, equivalent to one of the World’s Oceans. Conversely it also suggests the enormity of what we are doing to an ecosystem that is probably critical for our welfare. The second concept, not proven but for which there is mounting evidence, presents the Amazon as a vast community of ca 385 billion trees mutually interdependent with trillions of micro-organisms, insects and vertebrates functioning in concert as a water pump, extracting water from the ground, catalyzing its conversion to rain in the lower atmosphere and in doing so drawing water vapour in from the Atlantic Ocean and sending moisture to the grain belt of South America creating one of the most productive agricultural landscapes in the World.
The main points of Antonio’s report are that 1) the Amazon generates a climate that supports agriculture to its south, 2) deforestation will result in a climate that does no longer supports agriculture in southern South America, 3) that the nature of the Amazon’s impact on climate means that there is a point of no-return with respect to deforestation which once passed will lead irreversibly to desertification for much of southern South America, 4) that deforestation in the Amazon is already having an impact on the regions climate and that this could accelerate the impact of climate change on the Amazon, and lastly 5) it is not too late to reverse these impacts and that muscular actions to outlaw forest fires and deforestation coupled with a popularization of the scientific research on the Amazon cold avert the destruction of the Green Ocean. I can not recommend reading the report enough, it is engagingly and precisely written and will make you amazed at the impact forest have on our World.
We have been working with the Pimpollo community for just over a year. It has been a real challenge for us, as well as for them. The community is formed of a group of ca 25 families settled in the Amazon for less than two years and from three different parts of the Bolivian Andes. Life is very difficult for these communities. For a start they do not know each other very well and yet will depend on each other for their survival. This creates a number of tensions and in the last year of contact with Pimpollo we have seen an almost complete change in family composition with only three of the original families remaining. Secondly, Pimpollo is located over a 100 km, on dirt-track, from the nearest town, the last 30 km or so of which is semi-passable during the wet season. This makes access to medical care, schooling and security intermittent at best, especially considering that there is no phone coverage and all communication occurs through VHF radio. Thirdly, they are very poor and farming some of the World’s poorest soils. Having recently come from the relatively fertile Andes, this poses real challenges. It also makes it much harder for us to maintain contact.
Our plot at Palacios is located in seasonally flooded forest on the banks of the Tahumanu river. This meant that we had to plant our seedlings after the flood had receded as they would probably not have survived if completely immersed. The up-side of flooding though is that the soils are rich and the seedlings, although planted late, have grown well. When the next floods occur in February they will be tall enough not to be completely submersed and so should survive. It might seem strange that a slash-and-burn site on such rich alluvial soils should be abandoned and this was something I was keen to find out from the community. They explained that after a year or more weeds invade the site very aggressively and are very difficult to remove. We are hoping that Inga‘s rapid growth, spreading crown and large leaves should act as an effective weed-suppressant. It may be that weed control could be one of the main uses of Inga in the Amazon.
The trees at Palacios have grown well, on average over 11 cm per month. Currently they range from 1.0-1.5 m in height at six months since planting. With the most intense rains to come they should increase this rate significantly over the next few months. They still need weeding, probably until after the next floods,. The community seem pleased with progress too and are planning another plot for after the next floods.
Although the seedlings we planted at our San José site are growing poorly and about 1/4 of them have not survived, this is a strategically important site for us. This is because it represents a worst-case scenario in terms of land-use: top-soil removal combined with heavy compaction by a bulldozer. Compaction causes severe and long-lasting damage to soils that can take decades to recover from. The community of San José, by electing to establish an agroforest plot on this site, have given us an opportunity to gauge growth and mortality rates Inga edulis on such areas and so evaluate their potential with respect to restoring them to productivity.
We established our first Inga agroforest plot on an abandoned slash-and-burn site in a community called Motacusal just over nine months ago. Since then the seedlings have grown into small trees, most of which are over 2m high. In another six months their crowns will be touching and they will have captured the site, that is to say, they will prevent any other plants from growing. This will enable the local farmers to plant what they want when they want and not have to worry about weeds. They will of course need to pollard the trees before they do so.
One of the most effective ways to conserve natural forest is to maximize the income local communities get from it in a sustainable manner. Even if they are not the official owners of the land they will likely resist any deforestation if it impacts on their income. The forests of the Pando are fortunate in having two important non-timber forest products: brazil nuts and wild rubber. Both of which have wrought the history of this part of the Amazon. In recent years, with the drop in the price of wild rubber associated with the rise of plantation rubber in Asia, there has been a decline in the tapping of wild rubber. If done correctly the tapping of wild rubber does little lasting damage to the trees and produces a high quality rubber that is currently sold for 14 BOB a kilo, about £1.40 / $2 / €1.60. If that price could be increased then rural communities would be much keener to tap the wild rubber trees in their forests. By how much could be the focus of a fascinating research project.