本帖最后由 choi 于 3-2-2018 11:43 编辑
(1) Cities and farming | Into the Urban Maw; The explosive growth of cities is changing the agriculture in poor countries.
https://www.economist.com/news/i ... professionalise-how
Quote:
"LOOKING out from Mathabari, a village in northern Bangladesh, the landscape glints and ripples. Twenty years ago this was a rice-farming area, with fields of bright green. Now most of the land is covered with water. Carp, pangasius, catfish and tilapia swim in ponds separated by earth embankments. A few of the remaining patches of dry ground are occupied by sheds, where chickens are raised. * * * with electric paddle wheels to keep the water oxygenated. He [the owner/operator] has even built a feed mill to grind maize, mustard oil cake and other raw materials into fish pellets. * * * He mostly farms pangasius, an unfussy silver-white fish, native to South-East Asia, which can breathe air. In the early years Mr Khamar would haul 20 tonnes from each acre of pond. Now, with better feed and cultivation methods, he gets about 40 tonnes.
"In 2016 Bangladesh's farmers produced 2.2m tonnes of fish (see chart). That is more than its fishermen caught in the wild, and more than fish farmers produced in any other country except China, India, Indonesia and Vietnam.
"Ben Belton, an expert on Asian aquaculture at Michigan State University, estimates that 94% of Bangladesh’s farmed fish are eaten domestically.
"Aquaculture requires about twice as much labour per acre as rice farming, and the demand is year-round. * * * Seasonal hunger, which is a feature of life in some rice-farming regions of Bangladesh, is rarer in the watery districts. * * * food is now so cheap
in both Bangladesh (where fish are farmed) and Nigeria (chicken), "official statistics are so poor. Chicken and fish farmers have little idea what their competitors are producing, so they find it hard to predict what price their produce might fetch at market.
"In a warehouse [(ie, indoor) in a town in Bangladeshi town, a farmer named] Shamsul Alam has installed eight large vats. When he shines his torch in, they are revealed to contain thousands of stinging catfish. Although the fish is tricky to handle, owing to the venom in its dorsal spines, it is a delicacy that fetches at least four times as much as pangasius per kilo. The water in the vats is cleaned by a machine imported from Canada. It is an expensive, technically complex way of farming fish. The indoor fish farm poses no competitive threat to open-air [fish] farmers.
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