Sheep - AgRIS

Sheep - AgRIS Sheep - AgRIS

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Marked ewes are either insemianted to get the labour force acquainted with procedure and a few rams checked and trained or these are put aside and brought back into the mob at the end of the cycle. Generally the drafted ewes are insemianted on the acceptable type of estrous mucus. Obviously those ewes which are drafted late in estrous are rejected. After the morning draft the remaining flock is redrafted at 4,00 p.m. These ewes which are called as "A ewes" have commenced estrous between 9.00 a.m. and 4 p.m. The main flock is returned to the paddock with teasers and brought in for drafting again the following morning. The marked ewes which are called as "B ewes" have commenced estrous between 4.00 and 8.00 a.m. The "A ewes" are inseminated between 7.00 to 8.00 a.m. the following day. The "B ewes" are insemianted between 10 a.m. and 3 p.m. the day they are drafted off. All the "A ewes" are inseminated between 15 and 23 hours after the onset of estrous. All the "B ewes" are inseminated between 6 and 11 hours after the onset of estrous. 9. 3 Grazing & Feeding Systems 9. 3.1 Traditional Grazing Sheep raising is mainly in the hands of the weaker sections of the community which either do not possess land or their landhold- ings are so small that crop cultivation does not provide remunera- tive employment all the year round. Further, in the major sheep rearing areas especially in north western districts of Rajasthan grazing and stock watering resources are available only for a few months in a year, compelling shepherds to lead a nomadic life. The system of constant migration is one of the main reasons for the high percent- age of illiteracy among these sections of the people. Even children of the family have no chances of education because they are also constantly on the move and are employed by their family for graz- ing the sheep flocks. Due to lack of education these sheep owners are not able to appreciate and adopt improved sheep husbandry practices brought to them by extension workers. Sheep management has thus remained in a neglected state. Migration and grazing practices have an impact on the present status of sheep husbandry in the country. In the northern hill- region, migration of sheep usually starts in April-May and it takes about a month for the flocks to reach the alpine pastures. The flocks graze on these pastures for about 5 to 6 months and then start returning to the foothills by September-October and reach the destination by November. The time taken to reach the alpine pastures largely depends upon weather conditions and the vegetation available on the route of migration. In the hill areas, one or two members of the farnily go with the flock during migration but the rest stay behind to look after agricultural operations. The economic condition of shepherds in this region is better than that of their counterparts in the plains. A fairly large percentage of sheep in Rajasthan is maintained on migratory basis. According to an estimate about 1.5 million sheep migrate from the State every year and out of this about 0.6 million sheep are on migration all the year round. Sheep migration is a regular practice with the sheep breeders of the western arid districts of Jaisalmer, Barmer, Jodhpur, Pali, Jalore, Nagaur and Bikaner. It is understood that prior to Partition, sheep from Jaisalmer and Barmer districts used to migrate to the canal areas of Sind during the months of March to June while the sheep from the eastern areas used to migrate towards further east or southwards to the bordering areas in the States of Uttar Pradesh, Madhya Pradesh and Gujarat. Sheep breeders from the districts of Jaisalmer, Barmer and Bikaner and parts of Jodhpur practise temporary migration extending over periods of 6 to 9 months. The flock owners usually start migration with their sheep after Diwali festival in November. Sheep flocks excepting those from Barmer and Jaisalmer districts usually migrate towards the south to Madhya Pradesh taking different routes and finally reach Nagda which is a central place for sale of wool. Sheep flocks also move towards east to Uttar Pradesh along the Chambal and Yamuna river belts. It has been estimated that about 0.2 to 0.3 million sheep from Jaisalmer and Barmerandparts of JodhpurandJaloremigratetowards Gujarat and the breeders arrange for the sale of wool at Deesa in Gujarat. As the routes towards Madhya Pradesh are new and quite unfamiliar to the sheep breeders of Jaisalmer and Barmer they do not migrate long distances except under very acute conditions of drought and scarcity of fodder. This may perhaps be one of the reasons for heavy losses of sheep sustained by the sheep breeders of these districts during continuous drought periods. Sheep flocks from parts of Bikaner, Churu and Sikar districts usually migrate towards north to areas in Haryana, Punjab and Delhi. Sheep owners of Nagaur district practise migration all the year round because of heavy pressure on 453

land and they depend on the forest areas in Rajasthan and Madhya Pradesh for the grazing of their sheep. Maintaining sheep on migration through most part ofthe year does not permit the sheep owners to obtain adequate income from their flocks. With such a system of constant movement of sheep over long distances with uncertain grazing and stock watering facilities, the sheep owners are unable to adopt scientific methods of breeding for genetic improve ment of stock. Shearing of sheep in distant places and sale of wool at far away markets do not give them any chance for organised collection, processing and marketing of wool and the sheep breeders are unable to bargain for a remunerative price. These difficulties could be alleviated if the State Animal Husbandry/Sheep and Wool Departments set up service centres on the migration routes. In the north temperate region sheep are grazed on alpine pastures during most ofthe summer months; in autumn and winter seasons, they are grazed on harvested fields in the lower ranges of the hills and reserve forests. Usually 7 to 8 hours of grazing is practised in a day. However, grazing in winter does not meet the nutritional requirement especially for the animals in advanced pregnancy. This reduces lambing percentage and results in poor lamb survival and growth due to low mothering ability. Serious efforts are, therefore, called for in improving grazing/fodder resources during the winter. This is possible through raising a short term fodder crop after rice. It is estimated that even at present about 13 per cent of the flocks are hand fed on some grains, conserved fodder or green leaves during winter. In the north western region, sheep are grazed on uncultivated lands during monsoon months. During post-monsoon Deriod when kharif crops are harvested, they are grazed on stubbles. In November and December nonmigratory flocks are mostly grazed on uncultivated lands, whereas migratory flocks are grazed on har vested fields and in reserve forests on their migration routes. Top feeding by lopping tree branches and the feeding of pods are common. During extreme summer months, the flocks are grazed in the cool hours of the day and rested during the noon hours. In the peninsular region, there is hardly any migration of flocks. The flock size in this region is generally small and the sheep are mostly grazed on stubbles in the harvested fields or in forest or hilly areas. The sheep have thus to subsist at present mostly on stubble, tree loppings and grasses in denuded lands all over the country except in northern hill region where during summer they graze on relatively better pastures in the alpine region. Almost no attention has so far been paid to improve grasslands and to make provision for supply of drinking water to the flocks. 9.3.2 Rotational Grazing The fodder crops should be included in the grain or commercial crop rotation programme. The practice of keeping the lands fallow for wheat, paddy, gram etc. should be discontinued and fodder crops like sorghum, pearlmillet, cowpea and clusterbean should be introudced in kharif in the rotation. The fodder crops should also be sown with grain or commercial crops in such a way that they do not affect the production of grains. Alongwith sorghum and pearlmillet, the legumes like cowpea, dolichos, clusterbean, clitoria, black-gram and green gram, may very easily be grown as companion crops. the legumes will not only provide nutritious fodder for sheep without adversely affecting the grain yield but will also improve the soil fertility through nitrogen fixation which in turn will be available to the grain crop. It is essential that the programme of feeds and fodder development should provide for the production and multiplication of seeds and planting materials of recommended fodder crops. 9.3.3 Silvipasture Grazing Establishment of silvipasture improves quality of nutrient available ensuring its supply round the year. Experiment conducted at CSWRI has indicated that the hoggets are able to achieve 30 kg at yearling age whereas under grazing on natural pastures with some supplementaion with grass and cultivated fodder hay it was 25 kg. Similar studies conducted on ewes in advance stage of gestation and lactation indicated that pasture intake was not adequate for them requiring supplementation to harvest desirable production traits. Another study with weaner lambs and kids on three and two tier silvipasture indicated that lambs and kids were able to achieve 22.0 kg body weight at 6 months of age without concentrate supplementation. Silvipasture The fodder trees serve as a potential source of feed for sheep during December to June when the grazing resource becomes sparce. The common fodder trees of arid and semi-arid regions are ardu (Ailanthus excelsa), arjun ( Terminalia ariuna), babool (Acaciaarabica 454

land and they depend on the forest areas in Rajasthan and Madhya Pradesh for the grazing of<br />

their sheep. Maintaining sheep on migration through most part ofthe year does not permit the<br />

sheep owners to obtain adequate income from their flocks. With such a system of constant<br />

movement of sheep over long distances with uncertain grazing and stock watering facilities, the<br />

sheep owners are unable to adopt scientific methods of breeding for genetic improve ment of<br />

stock. Shearing of sheep in distant places and sale of wool at far away markets do not give them<br />

any chance for organised collection, processing and marketing of wool and the sheep breeders<br />

are unable to bargain for a remunerative price. These difficulties could be alleviated if the State<br />

Animal Husbandry/<strong>Sheep</strong> and Wool Departments set up service centres on the migration<br />

routes.<br />

In the north temperate region sheep are grazed on alpine pastures during most ofthe<br />

summer months; in autumn and winter seasons, they are grazed on harvested fields in the lower<br />

ranges of the hills and reserve forests. Usually 7 to 8 hours of grazing is practised in a day.<br />

However, grazing in winter does not meet the nutritional requirement especially for the animals<br />

in advanced pregnancy. This reduces lambing percentage and results in poor lamb survival and<br />

growth due to low mothering ability. Serious efforts are, therefore, called for in improving<br />

grazing/fodder resources during the winter. This is possible through raising a short term fodder<br />

crop after rice. It is estimated that even at present about 13 per cent of the flocks are hand fed<br />

on some grains, conserved fodder or green leaves during winter. In the north western region,<br />

sheep are grazed on uncultivated lands during monsoon months. During post-monsoon Deriod<br />

when kharif crops are harvested, they are grazed on stubbles. In November and December nonmigratory<br />

flocks are mostly grazed on uncultivated lands, whereas migratory flocks are grazed<br />

on har vested fields and in reserve forests on their migration routes. Top feeding by lopping tree<br />

branches and the feeding of pods are common. During extreme summer months, the flocks are<br />

grazed in the cool hours of the day and rested during the noon hours. In the peninsular region,<br />

there is hardly any migration of flocks. The flock size in this region is generally small and the<br />

sheep are mostly grazed on stubbles in the harvested fields or in forest or hilly areas. The sheep<br />

have thus to subsist at present mostly on stubble, tree loppings and grasses in denuded lands all<br />

over the country except in northern hill region where during summer they graze on relatively<br />

better pastures in the alpine region. Almost no attention has so far been paid to improve<br />

grasslands and to make provision for supply of drinking water to the flocks.<br />

9.3.2 Rotational Grazing<br />

The fodder crops should be included in the grain or commercial crop rotation programme.<br />

The practice of keeping the lands fallow for wheat, paddy, gram etc. should be discontinued<br />

and fodder crops like sorghum, pearlmillet, cowpea and clusterbean should be introudced in<br />

kharif in the rotation. The fodder crops should also be sown with grain or commercial crops in<br />

such a way that they do not affect the production of grains. Alongwith sorghum and pearlmillet,<br />

the legumes like cowpea, dolichos, clusterbean, clitoria, black-gram and green gram, may very<br />

easily be grown as companion crops. the legumes will not only provide nutritious fodder for<br />

sheep without adversely affecting the grain yield but will also improve the soil fertility through<br />

nitrogen fixation which in turn will be available to the grain crop. It is essential that the<br />

programme of feeds and fodder development should provide for the production and<br />

multiplication of seeds and planting materials of recommended fodder crops.<br />

9.3.3 Silvipasture Grazing<br />

Establishment of silvipasture improves quality of nutrient available ensuring its supply<br />

round the year. Experiment conducted at CSWRI has indicated that the hoggets are able to<br />

achieve 30 kg at yearling age whereas under grazing on natural pastures with some<br />

supplementaion with grass and cultivated fodder hay it was 25 kg. Similar studies conducted on<br />

ewes in advance stage of gestation and lactation indicated that pasture intake was not adequate<br />

for them requiring supplementation to harvest desirable production traits. Another study with<br />

weaner lambs and kids on three and two tier silvipasture indicated that lambs and kids were<br />

able to achieve 22.0 kg body weight at 6 months of age without concentrate supplementation.<br />

Silvipasture<br />

The fodder trees serve as a potential source of feed for sheep during December to June<br />

when the grazing resource becomes sparce. The common fodder trees of arid and semi-arid<br />

regions are ardu (Ailanthus excelsa), arjun ( Terminalia ariuna), babool (Acaciaarabica<br />

454

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