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And they came in two by
two... Integrating animals into an agroforest system
Animals are a very
important fertility component in our agroforest system. For five months out
of the year our hot, dry sandy conditions impede decomposition of organic
matter, which dries into straw and blows away. The stomach of the animals
does what the soil normally would do : digests the organic matter,
enrichening it with beneficial bacteria and decomposing the plant material
so that it can be used by the plants.
We are not vegetarians, so
the addition of eggs and meat to our diet helps keep the bills down and
gives us variety. In our village one animal (beef or lamb) is slaughtered a
week and sold to the neighbors. As we have no refrigerator the meat is
salted and dried, and consumed in tiny portions over the week.
Over the last three years
seven different animals have been tested here: chickens, ducks, geese,
goats, sheep, rabbits, and our “housecow†Lisbela. We no longer keep
sheep- they are a bit complicated to manage under our conditions. Our
systems are by no means definitive, but our results until now could be
useful for other startups.
The Chickens
We originally had a mobile
chicken system, to help kick-start the poor sandy soils. Although the
results were very favorable, the hens did not like being moved about. They
preferred laying their eggs under the bushes, and when the pens were moved,
they jumped the fence to go back to the old place. We finally built two
chicken pens for them, which have been quite successful. Today they are our
feathered composters, producing enormous quantities of high-grade organic
material, full of beneficial seeds (tomatoes, peppers, horned cucumbers,
papaya) which we use directly in the fields or build into compost piles.
Their pens are round, 12
yards in diameter, surrounded by chicken wire and covered with coconut
fronds, giving them very comfortable conditions even in the heat. We throw
enormous quantities of ground elephant-grass and sawdust, and all organic
residues from the kitchen are added to the bed. The chickens are happily
busy the day long scratching the material, and eating whatever it is that
they find to their liking.
Each hen pen has a paddock
of approximately 1,000 square feet containing fruit trees, elephant grass,
and weeds. We let them into the paddocks at the end of the day to supplement
their diet. The short time is to prevent them from drying out the system by
their scratching. As soon as we bring them the buckets of the organic refuse
from the kitchen (their favorite moment of the day!) they come running back
and the doors are closed.
In the mornings they
receive corn and cowpeas with a bit of calcitic lime and from time to time
fresh green grass. They seem to be healthy and happy, although we consider
the egg production a bit below the desired. The advantage of this system is
that if a hen becomes broody we can fence off a corner of the pen for her to
hatch her eggs, thus introducing the next generation into the family without
major conflicts.
The idea of two pens is to
be able to alternate renovation of the families. Each pen has 8-10 hens at
the moment, but the capacity would be closer to 15, which we intend to build
up.
The ducks
Surprisingly, ducks are
better for our system than chickens. They eat the weeds and insects,
producing enormous amounts of very fresh manure. We have discovered that
they do very well here during the seven months of cooler weather if we offer
them a large dishpan of water for drinking and bathing.
They are let out early in
the morning and offered leftover rice and beans, or corn. They then graze
for a time in a moveble pen in the new agroforest. In the evenings they are
returned to their resting area around the chicken pens, where there is a
small cement pool for their bathing. This pool is high enough to have an
outlet for draining off the highly-fertilized water which is used as a sort
of liquid manure. There is a faucet beside the pool with a length of hose
for refilling. This system works very well. The whole area is covered with a
blanked of ground elephant grass, and also becomes part of the compost pile.
Roast duck is a favorite
meal here, and we normally don´t try to nurse them through the dry season,
buying ducklings every year. The first area where we kept ducks is the most
fertile part of our property today.
With time we will divide
the whole property (23 acres) into paddocks with live fences to rotate the
ducks around. For the time being we use portable fencing.
They help manage the weeds,
and give the young trees of our agroforest a chance to dominate the weeds.
The “house cowâ€
We have one cow, Lisbela,
who produces a calf once a year. She can be milked over a period of about
six months, after which we used todo without ( there are no children in
residence) or buy milk from the neighbors, until we bought our milk goat.
Lisbela has her own pasture
in a 12-acres plot we have recently acquired. During the day she comes into
the neighboring 20 acres of annual crops, where she has a pen, and is
milked. She spends some time with her son, Jordgi, before they are let out
into another pasture. The pen is a wonderful source of manure , which is
spread over deep litter, producing compost for the corn and pumpkins.
We consider the investment
in this pen next to the planting fields one of the best investments we have
made. In 2007 the rains were a bit erratic, and most of the neighbors had
poor corn production. Our corn fields were tall and healthy, thanks to
Lisbela and Jordgi.
Besides the two different
pastures ( both still of rather poor quality) we offer cut elefant grass,
mineral supplement, and from time to time some bran, fed to her at milking
time.
She spends the day with her
son. In the evening he is taken back to the pen and she is returned to the
other pasture, where she spends the night.
Although we are having good
results with the cow, it is labor-intensive in that someone has to go every
evening to separate her from the calf ( so there will be milk in the
morning!). As she is big and has horns, this is a fairly daunting task for
the women of the house, being left to the men!
The goat
In order to have milk while
the cow is dry we have one milk goat, Heidi, who gives about a quart of milk
a day. She lives permanently in the agroforest area, tethered by day,
sleeping nights in a small but comfortable roofed area.
In the future we intend to
work with only milk goats. David Holmgren pointed out that the advantage of
having goats in the rotation system integrated with annual cultures ( rather
than a cow) is that they forage the trees on the edge of the paddocks and
transport that fertility into the planting area through their manure,
whereas the cow only eats what is already in the paddock. Goats are small
enough for women to handle, and we can always keep two milking goats in the
agroforest area near the kitchen, leaving the rest to circulate through the
planting area. Goats also are more drought-resistant, needing little water.
They produce twice a year and their offspring have a good market value in
this region.
The rabbits
Rabbit raising has been so
successful that we can barely keep up with them! Fortunately the natives in
this part of Northeast Brazil are hunters, so they know how to clean and
prepare rabbits. (They are scalded, roasted a bit over the charcoals and
then cooked in coconut milk. Hmmmm)
It is part of the
Permaculture ethic to give animals comfortable conditions and to permit
them to maintain habits natural to them. Thus chickens scratch and move in
herds, the cow stays with her calf, and the rabbits are permitted to live in
holes in the ground.
We built a little house
roofed with palm fronds and inserted into a four-foot deep hole which was
cemented ( with drainage hole) to prevent escape. Three feet of dirt were
thrown over the floor and the rabbits permitted to dig burrows and live in
families. They have been quite happy with the arrangement, having their
babies underground to the point that we know about them only when they peep
out of the holes, half-grown.
From one couple we now have
fifteen rabbits of all sizes. They were getting ahead of us because we were
having difficulty catching them before they scooted back into the burrows!
But now some openings have
been made in the tunnels so that problem has been resolved, and we can
easily eat two rabbits a week at the rate they are going.
They are really easy to
keep: in the morning they receive a bit of ground corn and cowpeas and
greens especially leucena, tree cotton, moringa, and some favorite weeds.
In the evening they receive the same, but in larger quantities, as they are
nocturnal.
We scrape and sieve the top
layer of sand from time to time to remove the manure, which is composted for
the vegetable garden. Once a year we clean out the house, renewing the dirt
layer. The rich dirt which is removed is used in the nursery.
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