麦わら、ストロー

WordNet

of a pale yellow color like straw; straw-colored
plant fiber used e.g. for making baskets and hats or as fodder
a thin paper or plastic tube used to suck liquids into the mouth (同)drinking straw
cover or provide with or as if with straw; "cows were strawed to weather the snowstorm"
sweet wine from grapes partially sun-dried on the vine or on straw mats
made with strawberries (同)strawberry preserves
ice cream flavored with fresh strawberries
daiquiri with crushed strawberries

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〈U〉《集合的に》『麦わら』,『わら』 / 〈C〉(1本の)『わら』 / 〈C〉(飲み物を飲むときに使う)『ストロー』 / 〈U〉《しばしばa~》《否定文で用いて》つまらない物;ごくわずか

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/08/02 13:24:02」(JST)

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For other uses, see Straw (disambiguation).

Not to be confused with hay.

Large round bales of straw

Bundles of rice straw

Pile of "small square" straw bales, sheltered under a tarpaulin

Straw or hay briquettes are a biofuel substitute to coal

Straw is an agricultural by-product, the dry stalks of cereal plants, after the grain and chaff have been removed. Straw makes up about half of the yield of cereal crops such as barley, oats, rice, rye and wheat. It has many uses, including fuel, livestock bedding and fodder, thatching and basket-making. It is usually gathered and stored in a straw bale, which is a bundle of straw tightly bound with twine or wire. Bales may be square, rectangular, or round, depending on the type of baler used.

Uses

Current and historic uses of straw include:

Animal feed
- Straw may be fed as part of the roughage component of the diet to cattle or horses that are on a near maintenance level of energy requirement. It has a low digestible energy and nutrient content. The heat generated when microorganisms in a herbivore's gut digest straw can be useful in maintaining body temperature in cold climates. Due to the risk of impaction and its poor nutrient profile, it should always be restricted to part of the diet. It may be fed as it is, or chopped into short lengths, known as chaff.

Basketry
- Bee skeps and linen baskets are made from coiled and bound together continuous lengths of straw. The technique is known as lip work.

Bedding: humans or livestock
- The straw-filled mattress, also known as palliasse, is still used in many parts of the world.
- It is commonly used as bedding for ruminants and horses. It may be used as bedding and food for small animals, but this often leads to injuries to mouth, nose and eyes as straw is quite sharp.

Biofuels
- The use of straw as a carbon-neutral energy source is increasing rapidly, especially for biobutanol. Straw or hay briquettes are a biofuel substitute to coal.

Biomass
- The use of straw in large-scale biomass power plants is becoming mainstream in the EU, with several facilities already online. The straw is either used directly in the form of bales, or densified into pellets which allows for the feedstock to be transported over longer distances. Finally, torrefaction of straw with pelletisation is gaining attention, because it increases the energy density of the resource, making it possible to transport it still further. This processing step also makes storage much easier, because torrefied straw pellets are hydrophobic. Torrefied straw in the form of pellets can be directly co-fired with coal or natural gas at very high rates and make use of the processing infrastructures at existing coal and gas plants. Because the torrefied straw pellets have superior structural, chemical and combustion properties to coal, they can replace all coal and turn a coal plant into an entirely biomass-fed power station. First generation pellets are limited to a co-firing rate of 15% in modern IGCC plants.

Construction material: bricks / cob
- In many parts of the world, straw is used to bind clay and concrete. A mixture of clay and straw, known as cob, can be used as a building material. There are many recipes for making cob.
- When baled, straw has moderate insulation characteristics (about R-1.5/inch according to Oak Ridge National Lab and Forest Product Lab testing). It can be used, alone or in a post-and-beam construction, to build straw bale houses. When bales are used to build or insulate buildings, the straw bales are commonly finished with earthen plaster. The plastered walls provide some thermal mass, compressive and ductile structural strength, and acceptable fire resistance as well as thermal resistance (insulation), somewhat in excess of North American building code. Straw is an abundant agricultural waste product, and requires little energy to bale and transport for construction. For these reasons, strawbale construction is gaining popularity as part of passive solar and other renewable energy projects.^[1]
- Enviroboard can be made from straw.
- Strawblocks

Crafts
- Corn dollies
- Straw marquetry
- Straw painting
- Straw plaiting

Erosion control
Straw bales are sometimes used for sediment control at construction sites.^[2] However, bales are often ineffective in protecting water quality and are maintenance-intensive. For these reasons the U.S. Environmental Protection Agency (EPA) and various state agencies recommend use of alternative sediment control practices where possible, such as silt fences, fiber rolls and geotextiles.^[3]
- Burned area emergency response
- Ground cover
- In-stream check dams

Hats
- There are several styles of straw hats that are made of woven straw.
- Until about 100 years ago, thousands of women and children in England were employed in plaiting straw for making hats. These days the straw plait is imported.^{[citation needed]}

Horticulture
- Straw is used in cucumber houses and for mushroom growing.
- In Japan, certain trees are wrapped with straw to protect them from the effects of a hard winter as well as to use them as a trap for parasite insects.
- It is also used in ponds to reduce algae by changing the nutrient ratios in the water.
- The soil under strawberries is covered with straw to protect the ripe berries from dirt, and straw is also used to cover the plants during winter to prevent the cold from killing them.
- Straw also makes an excellent mulch.

Packaging
- Straw is resistant to being crushed and therefore makes a good packing material. A company in France makes a straw mat sealed in thin plastic sheets.
- Straw envelopes for wine bottles have become rarer, but are still to be found at some wine merchants.
- Wheat straw is also used in compostable food packaging such as compostable plates. Packaging made from wheat straw can be certified compostable and will biodegrade in a commercial composting environment.^[4]

Paper
- Straw can be pulped to make paper.

Belarusian Straw Bird

Rope
- Rope made from straw was used by thatchers, in the packaging industry and even in iron foundries.

Shoes
- Koreans wear Jipsin, sandals made of straw.
- In some parts of Germany like Black Forest and Hunsrück people wear straw shoes at home or at carnival.

Targets
- Heavy gauge straw rope is coiled and sewn tightly together to make archery targets. This is no longer done entirely by hand, but is partially mechanised. Sometimes a paper or plastic target is set up in front of straw bales, which serve to support the target and provide a safe backdrop.

Thatching
- Thatching uses straw, reed or similar materials to make a waterproof, lightweight roof with good insulation properties. Straw for this purpose (often wheat straw) is grown specially and harvested using a reaper-binder.

References

^ *The Straw Bale House: Suitability for the Eastern U.S.
^ California Stormwater Quality Association. Menlo Park, CA. “California Stormwater BMP Handbook: Straw Bale Barrier.” Best Management Practice (BMP) No. SE-9. January 2003.
^ U.S. Environmental Protection Agency. Washington, DC. "National Menu of Stormwater Best Management Practices: Straw or Hay Bales." June 1, 2006.
^ Viv Biz Club: Compostable Plates

External links

Wikimedia Commons has media related to: Straw

Wikimedia Commons has media related to: Straw bales

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