Grasslands of the World.pdf - Disasters and Conflicts - UNEP

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PABLO BORELLI PABLO BORELLI Grasslands of Patagonia 137 Plate 4.4 Sheep being driven up to summer range paddocks in the Magellan Steppe . Plate 4.5 Gauchos herding a Corriedale flock on bunchgrass rangelands in southwestern Patagonia . Sheep farming is extensive ; each farm has, on average, three to four 5 000-ha fenced paddocks. No supplementary feeding is used. On-farm hay or silage production is insignificant and off-farm feeds are too expensive. Animals graze freely in large areas and are never housed, in spite of periodic severe winters. There is significant mortality during big snow falls (Sturzenbaum and Borrelli,
138 Grasslands of the world 2001). Sheep are gathered three or four times each year. Drinking water comes from springs and lagoons, rivers, artificial ponds and windmill-pumped groundwater. Patagonia is free of Bovine Spongiform Encephalopathy (BSE disease) and Foot-and-Mouth Disease (FMD) (Robles and Olaechea, 2001). Environmental conditions constrain the development of internal parasites and anthelmintics are often not necessary (Iglesias, Tapia and Alegre, 1992); no antibiotics or hormonal treatments are used. Patagonian farms supply wool and meat that can naturally reach the highest standards of quality in terms of food safety and lack of contaminants. Despite this, sheep stocks have declined continuously since the 1980s (Figure 4.4) and, under current conditions, sheep farming is unsustainable , whether in economic, ecological or social terms (Noy-Meir, 1995; Borrelli and Oliva, 1999; Pickup and Stafford-Smith, 1993). Factors contributing to this are low wool prices, small farm size, poor adoption of available technology, desertification, high winter losses, predator losses, high farmer indebtedness and lack of sustainable development policies (Borrelli et al., 1997; Consorcio DHV, 1999). Sheep farming systems Conditions and attributes of sheep farming in Patagonia are quite heterogeneous, in spite of the general characteristics summarized above. The main sources of variation are: • rain and temperature gradients, which form twelve biomes that differ in rangeland vegetation , primary and secondary productivity and potential for rangeland improvement (as discussed in the natural vegetation section, above); and • farm size, as the sustainable number of sheep that can be kept on a farm depends on the area for grazing and its carrying capacity . Because sheep products are the only source of income, flock size determines farm income. Three kinds of farms can be recognized (Table 4.2): (1) Large commercial farms, with more than 6 000 head and which are usually derived from the first TABLE 4.2. Farm distribution by size in Argentinian Patagonia . Province Criterion Subsistence farms Small to medium units Big companies Chubut Neuquén Río Negro Santa Cruz Tierra del Fuego Total Argentinian Patagonia SOURCE: Data from Casas, 1999. By no. of farms: 52% 43% 5% By no. of sheep: 8% 61% 31% By no. of farms: 89% 9% 2% By no. of sheep: 20% 44% 36% By no. of farms: 69% 30% 1% By no. of sheep 20% 64% 16% By no. of farms: 16% 65% 6% By no. of sheep: 2% 49% 49% By no. of farms: – 37% 63% By no. of sheep: – 10% 90% By no. of farms: 54% 40% 6% By no. of sheep: 8% 54% 38%
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The views expressed in this publica
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iv Bush encroachment 60 Rehabilitat
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vi Grazing management 139 Sheep man
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viii Grazing lands, pasture and fod
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x Future 374 References 374 Chapter
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xii Herd management 474 Stocking ra
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xiv and environmental factors. Rese
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xvi or copied without her permissio
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xviii Glossary of technical terms a
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xx IUCN The World Conservation Unio
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Figure 1.1 Extent of the world’s
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2 Plate 1.2 Mosaic of cultivated cr
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4 Plate 1.4 Horse herd on grassland
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6 Grasslands of the world Plate 1.8
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8 Grasslands of the world Plate 1.1
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10 Grasslands of the world Plate 1.
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14 Grasslands of the world century.
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The above coverage leaves some obvi
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18 Grasslands of the world Riveros,
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20 Libyan Arab Jamahiriya Chad Cent
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26 Plate 2.2 Large non-ruminant her
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34 Grasslands of the world low pala
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36 Grasslands of the world is impor
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38 Grasslands of the world recently
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40 Grasslands of the world degradat
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42 Grasslands of the world leasehol
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44 Grasslands of the world However,
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46 Grasslands of the world technolo
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48 Grasslands of the world subsiste
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50 Grasslands of the world able to
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54 Grasslands of the world tall veg
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56 Grasslands of the world with wil
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58 Grasslands of the world fragment
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62 Grasslands of the world Reseedin
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64 Grasslands of the world last to
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66 Grasslands of the world Bourn, D
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68 Grasslands of the world Ellis, J
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70 Grasslands of the world the Euro
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72 Grasslands of the world Niamir,
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74 Grasslands of the world Schlesin
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76 Grasslands of the world Wilen, C
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78 Grasslands of the world INTRODUC
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80 Figure 3.2 The extent of grassla
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84 Grasslands of the world Figure 3
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188 Grasslands of the world TABLE 5
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190 Grasslands of the world soils d
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192 (c) Grassland with Melica macra
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196 Figure 5.3 Forage offer (FO ) a
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198 Grasslands of the world which a
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200 Grasslands of the world Fertili
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202 Grasslands of the world their c
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204 Grasslands of the world Paspalu
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210 Grasslands of the world Researc
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212 Grasslands of the world It is n
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214 Grasslands of the world Subtrop
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216 Grasslands of the world (Argent
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218 Grasslands of the world para Ba
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Grasslands of central North America
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REX PIEPER REX PIEPER Grasslands of
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S.G. REYNOLDS Grasslands of central
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MAE ELSINGER DUANE McCARTNEY Grassl
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JEFF PRINTZ, USDA-NRCS JEFF PRINTZ,
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S.G. REYNOLDS DUANE McCARTNEY Grass
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MAE ELSINGER Grasslands of central
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S.G. REYNOLDS Grasslands of central
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266 Figure 7.1 Map of Mongolia . Pl
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268 TABLE 7.1 Land resources of Mon
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270 TABLE 7.3 Projected total popul
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272 Plate 7.5 Wheat was once grown
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274 Grasslands of the world made of
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276 Grasslands of the world four ho
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278 Plate 7.9 Saddle horses on hitc
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280 TABLE 7.5 Haymaking by producer
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282 Plate 7.11 Meadow grazing - Ark
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284 Grasslands of the world croppin
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286 TABLE 7.10 Evolution of stock n
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288 Plate 7.14 Polled yak in autumn
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290 Figure 7.3 Evolution of stock u
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292 Grasslands of the world of this
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296 Grasslands of the world can go
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298 Grasslands of the world arable
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300 Grasslands of the world regulat
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302 Grasslands of the world systems
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304 Grasslands of the world Suttie,
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306 Grasslands of the world Figure
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308 Plate 8.3 Harvested wheat in th
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310 Grasslands of the world Tang. T
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312 TABLE 8.1 Grassland types of th
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314 Plate 8.5 Poa alpina . Plate 8.
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316 Grasslands of the world precipi
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320 Grasslands of the world of the
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322 Plate 8.11 Kokonor camp with th
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324 Plate 8.14 Milk collection. Pla
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326 Grasslands of the world The num
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328 Grasslands of the world part of
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330 Grasslands of the world Plate 8
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332 Grasslands of the world 340 000
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334 Plate 8.20 Longri summer camp.
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336 Grasslands of the world There i
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338 Grasslands of the world Clarke,
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340 Grasslands of the world Kush-Hi
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342 Grasslands of the world William
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344 Grasslands of the world grazing
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346 Grasslands of the world Growing
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348 Grasslands of the world that co
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350 Grasslands of the world cessati
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352 Grasslands of the world This zo
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354 Figure 9.2 Natural vegetation z
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356 Grasslands of the world or loam
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358 Grasslands of the world after r
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360 6 000 4 000 2 000 0 (a) Queensl
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362 Grasslands of the world Tropica
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364 Grasslands of the world AVAILAB
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368 Grasslands of the world from th
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370 Grasslands of the world grassla
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374 Grasslands of the world FUTURE
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376 Grasslands of the world Hall, T
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378 Grasslands of the world Martin,
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380 Grasslands of the world Wilson,
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382 Figure 10.1 Extent of grassland
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384 Grasslands of the world with su
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386 Grasslands of the world was to
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388 Plate 10.1 Agropyron pectinifor
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390 Plate 10.3 Festuca sulcata Gras
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392 Grasslands of the world The FSU
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394 Grasslands of the world thinkin
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396 TABLE 10.4 Climate data of the
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398 Plate 10.5 Kochia prostrata Pla
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400 Plate 10.7 Forest -steppe with
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402 Grasslands of the world Young f
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404 Plate 10.9 Poa bulbosa. Grassla
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406 Grasslands of the world shade-l
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408 Grasslands of the world Physica
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410 Grasslands of the world Mikheev
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412 Grasslands of the world it was
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414 Grasslands of the world of grou
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416 Grasslands of the world Vil’y
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418 Plate 11.1 Trifolium fragiferum
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420 Plate 11.2 Millet, a major crop
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424 Grasslands of the world sudania
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426 Grasslands of the world perenni
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428 Plate 11.8 Park grasslands in N
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430 Grasslands of the world In Para
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432 Plate 11.10b A grassland domina
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434 Grasslands of the world the nor
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436 Grasslands of the world remaini
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438 Plate 11.15 Small ruminants on
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440 Plate 11.19 Qinghai - motorcycl
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442 Plate 11.21 Leymus chinensis .
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444 Plate 11.22 The Himalaya -Hindu
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446 Plate 11.24 Transhumant Kuchi f
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448 Grasslands of the world grazing
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450 Plate 11.27 Delivering fodder t
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452 Plate 11.29 Syrian rangeland ha
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454 Grasslands of the world tains.
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456 Grasslands of the world Turkey
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458 Plate 11.31 Sainfoin (Onobrychi
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460 Grasslands of the world Gintzbu
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Grassland perspectives 463 Chapter
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Grassland perspectives 465 as well
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ALICE CARLONI ALICE CARLONI Grassla
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Grassland perspectives 469 The gras
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Grassland perspectives 471 Trees an
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Grassland perspectives 473 is lost.
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Grassland perspectives 475 breeding
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Grassland perspectives 477 traditio
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Grassland perspectives 479 the numb
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Grassland perspectives 481 to sown
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S.G. REYNOLDS SARDI Grassland persp
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MAGNUS HALLING SARDI Grassland pers
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Grassland perspectives 487 fencing
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MARZIO MARZOT Grassland perspective
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S.G. REYNOLDS Grassland perspective
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Grassland perspectives 493 extremel
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Index 495 A Acacia spp. 31, 34, 36,
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Index 497 B Baccharis spp. 175, 182
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Index 499 Chamaecrista spp. 199, 37
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Index 501 ciliatum 199 elegans 199
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Index 503 fl echillares 176, 177 fl
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Index 505 I Imperata spp. 3, 442, 4
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Index 507 sheep 288, 323, 326, 330
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Index 509 Poa spp. 133, 134, 135, 1
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Index 511 Sheep 14, 15, 38, 39, 84,
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Index 513 Tiller density 204 Touris
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