ICARDA's Research Portfolio


ICARDA's Research Portfolio

Theme 2. Production Systems Management
     Project 2.5. Improvement of Small-Ruminant Production in Dry Areas
 

ICARDA is helping small-scale farmers in CWANA to cope with the challenges of their traditional production systems. These include a significant decline in rangeland productivity in Central Asia, which has been exacerbated by droughts, and reduced market opportunities for traditional products. At the same time, opportunities are offered by the development of potential new markets for non-traditional products. To improve productivity, research has focused upon both plausible marketing options and the use of alternative fodder sources to cope with feed shortages in the rangelands. In 2002, studies in Uzbekistan and Turkmenistan demonstrated the potential for milk production in sheep breeds traditionally used for wool and pelts. Farmers found that cheese production was a valuable source of additional income. In addition, to address dry-season feed constraints in Turkmenistan, highly saline irrigation drainage water, otherwise dumped in the desert, was used innovatively to irrigate cultivated salt-tolerant plants. Even in a drought year, resulting forage yields were up to 60 times greater than those from natural rangelands.

Diversifying into sheep milk production in the steppes of Uzbekistan and Turkmenistan

The dissolution of the large Soviet market, after the breakdown of the Soviet Union, plunged Central Asian sheep production into crisis. Previously, production was centered on wool and pelts, meat was a by-product and milk production was not even considered an option. Now there is little local and regional demand for wool and pelts, prices are low, and the scale of production has shifted; huge landholdings and flocks have been replaced by thousands of small privatized units, each having a handful of animals. Returns per head and per flock are low. Thus, there is a need for increased diversification and the reorientation of production systems, to match current production to demand and to the scale of operations.
     ICARDA and Central Asian scientists, with financial support from the International Fund for Agricultural Development (through the Integrated Feed and Livestock Production Project) investigated production opportunities and market niches that could be exploited by small-scale producers. Some systems, such as those based on indigenous sheep (e.g. the Karakul sheep of Turkmenistan and Uzbekistan), require diversification, in view of the difficulties involved in marketing pelts and wool. Simultaneous studies on consumption of, and demand for, milk products suggested that production of milk derivatives could be an alternative. Therefore, to obtain much-needed baseline data, scientists studied milk production in native sheep breeds.
     The first study considered Karakul sheep in Uzbekistan, a breed native to the steppes of Central Asia. New-born Karakul lambs are slaughtered for their high-quality pelts. After they lamb, the so-called 'Mary' ewes are not milked until the next lambing season, as milk production is not usually the aim of the system.
     During spring, in 2000 and 2001, the milk production of 50 Karakul Mary ewes of two color genotypes (gray and black) was investigated in collaboration with the Karakul Sheep Breeding and Desert Ecology Research Institute in Nurata, Uzbekistan. Milk yields were monitored every 10 days for 70 days during the period March to May. This is the characteristic suckling period, before the start of the summer. Total milk yield was 54.5 kg per ewe (Table 22); production peaked in the third 10-day period and then decreased. By the fifth 10-day period, some 15% of the total milk produced overall was still to be collected; in the final 10-day period, at the end of lactation, only 5.5% of the total milk yield was produced. As in other breeds, milk was richest in the first 10 days (Table 22). Fat and total solid contents then decreased (being lowest at the point of maximum milk production in the third period), and then increased as milk production dropped.

Table 22. Milk production of Karakul Mary ewes1 (20 March-29 May 2001).
Consecutive
periods of
per 10 days
Milk production
in the period
(kg/ewe)
Distribution
of production
(% of total)
Content in milk period (%)

Fat             Total solids
10
 9
16.5
9.7
28.5
20
  10.5
19.3
8.1
22.2
30
11
20.2
7.8
21.7
40
 9
16.5
7.9
22.1
50
 7
12.8
8.0
22.5
60
 5
  9.2
8.1
22.8
70
 3
 5.5
8.5
23.1
Total
54.5
100.0
1 Mary ewes: ewes whose lambs were slaughtered at birth.

     Both age and genotype affected milk production. Total milk production, and its fat and solid contents, decreased with age: 3- to 4-year-old ewes produced the largest yield (65 kg) while older animals produced 20-30% less. The gray and the black Karakul sheep demonstrate many genetic differences. Gray lambs are usually heavier than black, and their pelage (fur) is usually over-developed; but, they are less healthy. Black ewes trailed gray ewes in total milk yield (50.65 vs. 57.67 kg). However, the milk of the black ewes was richer in fat and total solids. Gray ewes were depleted more rapidly during lactation than black ewes


Milking Karakul ewes, not practicd before in Central Asia, is proving to be an important source of additional income for farmers in Uzbekistan.

(whose milk contained high levels of fat and solids until the end of lactation).
Though low compared with specialized milk-sheep breeds, the production of 54.5 kg in 70 days, under rangeland conditions-that are sometimes marginal-is encouraging. Thus, there exist possibilities for increasing income from the present pelt-production system and, most promisingly, for increasing income-generating activities available to women.

    A second study considered lactating Karakul ewes in Turkmenistan. During 2000 and 2001, the productivity of ewes raising their lambs was assessed in collaboration with the Turkmen Agricultural University. During four months of lactation, ewes raising a single lamb produced 62.4 kg of milk; ewes raising twins produced 1.9 times that amount (120 kg). Maximum production (41-44% of total yield) was observed in the first month of lactation. By the end of the second month, almost 70% of the milk had been produced. Results obtained by farmers, though from another breed (Sarajin), suggest that a progressive milking

Central Asian farmers and scientists visiting the Sheep Unit at ICARDA's headquarters in Aleppo, Syria.

strategy—as early as 60 days after lambing—in addition to some level of feeding with hay and concentrates (250-300 g per head), could stimulate milk production to the extent that some milk could be recovered. Under these conditions, a total of over 20 kg of milk per ewe would be possible. This could provide income in addition to the production of lambs.
     Finally, the stories of two innovative Sarajin sheep farmers in Turkmenistan illustrate just how strong the desire of farmers to diversify production can be. The two farmers (Sapargulyev and Imamgulyev) collaborate with ICARDA and Turkmen scientists in an on-farm research network in Turkmenistan. Sarajin is a breed native to Turkmenistan, its meat is in high demand and its wool is used in the renowned Turkmen carpets. The breed has not previously been used for milk production.
     In mid-2000, the farmers attended a traveling workshop in West Asia that exposed them to production strategies, including milk production and processing, which are already being practiced by their counterparts in Syria and Turkey. The farmers did not wait to formally assess their flocks' milk production, but, using the knowledge they had gained, immediately milked their animals and turned that milk into cheese. In 2001, farmer Sapargulyev milked 40 of his lactating ewes from January to March, obtaining 1,148 kg of milk (28.7 kg per ewe). With techniques he had learned, he processed the milk into 230 kg of cheese that he sold for around US$380. In 2002 he milked more ewes, for a longer period (January to April), and produced 386 kg of cheese that sold for US$675. Also in 2002, farmer Imamgulyev decided to milk 30 of his ewes from January to April. This yielded 654 kg of milk (21.8 kg per ewe); the resulting cheese sold for US$150.
     Although Karakul and Sarajin are not specialized dairy breeds, the milk obtained under targeted management strategies offers possibilities for diversification and income generation in times when frustrated farmers face difficulties in marketing their pelts and wool. In 2002, ICARDA conducted a successful workshop on milk processing technologies designed for women farmers in Uzbekistan. It is expected that these efforts will help farmers to sustain their livelihoods during the critical period of their transition to a market-oriented economy.

New opportunities to enhance the feed base: using waste drainage water in the deserts of Turkmenistan

The breakdown of the former Soviet Union has had a major impact on both the feed production chain in Central Asia and the provision of fodder during critical periods of feed shortage. Previously large landholdings were broken up, and now the vast majority of producers farm on a small scale, with small numbers of animals, while others are landless. They have neither the resources nor sufficiently large flocks to justify seasonal grazing, nor can they produce fodder for the months of scarcity in drought and winter periods. This results in low productivity levels and serious degradation around villages. The crisis is severe in countries with harsh winters, where animals have to remain housed for several months due to extreme cold and snow. But the situation is also critical in countries (such as Turkmenistan and Uzbekistan) with less severe winters and extended periods of drought and hot weather.

     Ephemeral vegetation on rangelands is heavily grazed by sheep-the main livestock species. It starts growing in spring and early summer, but then declines in abundance from July until the rains start at the end of the year. Unfortunately, this decline occurs during two important periods in sheep production: mating, and the onset of the critical last 50 days of pregnancy. Rangeland feed availability can also decrease dramatically in drought years, as scientists from ICARDA and Turkmenistan's Research Institute of Desert Flora and Fauna found when measuring the biomass on two types of range on Yzgant Farm in the Central Karakoum desert (Fig. 12). Less than 25 kg/ha of standing biomass occurred in the fall of 2001, as rainfall that year (the end of a three-year drought) was only 80-90 mm.

Fig. 12. Consumable biomass (kg/ha of dry matter), in two types of ranges (Salsola-Calligonum and Calligonum-Astragalus), over periods of drought (2000-2001) and of average rainfall (2002), on Yzgant Farm, Central Karakoum, Turkmenistan.
     To address production constraints such as these, ICARDA, in collaboration with Central Asian NARS, and with funding from the International Fund for Agricultural Development, launched the Integrated Feed and Livestock Production Project in 1999. Through this, a way to produce low-cost fodder in the deserts of Turkmenistan was identified. Large irrigation systems in the country are used for the production of key crops, involving three major rivers being directed through the Karakoum Channel. Each year, an estimated 6-7 km3 of drainage water, passing through about 35,140 km of drainage channels, is dumped into the deserts after being used to irrigate crops. This water could be used to produce forage biomass to overcome feed shortages after the summer, particularly in degraded areas with high levels of salinity.
     An experiment was begun in 2001, on the farm where natural range vegetation had been measured (Fig. 12). Drainage water gathered in a collector (with a capacity of about 0.5-1.0 m3) installed in a drainage water channel, was used to irrigate 2.5 ha of degraded land with salinity problems. The land was sown with salt-tolerant plants (halophytes), both annual and perennial. Salinity levels of this water were higher (3-7 g/l, depending on the season) than those of the water in the major Karakoum Channel (0.6-0.7 g/l). On these saline soils, halophytes were sown between January and February and received two irrigations, each of 1,000 m3. The first was applied at the end of April, because the spring was unusually dry; the second was applied in August. By September, plant growth satisfied expectations, with annual Atriplex species (Atriplex heterosperma, A. dimorphostegia, and A. ornata) and Suaeda altissima attaining the greatest heights: 104 and 89 cm, respectively (Table 23). Perennial Atriplex species (A. canescens and A. turcomanica) exhibited the slowest growth.
Table 23. Growth characteristics of salt-tolerant plant species irrigated with saline drainage water on Yzgant Farm, Central Karakoum, Turkmenistan (spring to fall, 2001).
   
Average height of plants (cm)
 
Species

Area (ha)
Density
(thousand plants/ha)
mid-May

mid-June

mid-July

end Sept

Dry matter (kg/ha)*

Year 1
             
Climacoptera lanata
1.3
10-12
12.1
28.6
 37.5
 58.2
7.860
Annual Atriplex spp.
0.7
150-170
18.4
52.2
 84.1
103.6
8.750
Suaeda altissima
0.2
25-30
19.7
50.1
 65.4
 88.5
6.140
Perennial Atriplex spp.
0.3
2-3
 5.8
14.2
 21.5
 33.7
1.270
Year 2 (resown plants)
Climacoptera lanata
2.0
40-45
12.7
31.7
 44.7
61.6
13.100
Annual Atriplex spp.
1.2
75-100
30.0
65.8
119.3
149.3
15.450
Suaeda altissima
0.3
35-37
18.4
45.6
133.6
147.5
 9.520
Perennial Atriplex spp.**
  0.25
1-3
35.4
47.1
 63.1
 67.2
 3.755
* At the end of September.
** In the second year of growth.

     By September, the most productive species (Climacoptera lanata and annual Atriplex) were able to produce 7.8 and 8.8 tonnes of dry matter (DM)/ha, respectively. When compared with the small amount of biomass that is naturally available on the range at this time (less than 0.15 t/ha, Fig. 12), it is not surprising that local farmers are very interested in the results.
The trial was repeated in 2002. Seeds collected in 2001 were cleaned, dried and sown again in January and February, at a rate of 12-14 kg/ha in the case of C. lanata, 8-10 kg/ha in annual Atriplex, 6 kg/ha in perennial Atriplex and 8 kg/ha in S. altissima. The total area in this second year amounted to 3.75 ha, because part of the plot occupied in 2001 by S. altissima and A. heterosperma was left unplowed to study reseeding potentials.

     Spring rainfall in 2002 was above average, so early irrigation was not necessary. Thus, drainage water was applied only once, in late June. Germination occurred much later on the newly sown land (early April) than it did in the 'reseeding' plot (mid-March). By mid-April, seedlings from the February sowing were only 3-5 cm high, whereas those in the reseeding plots were 15-20 cm high (A. heterosperma) and 8-12 cm high (S. altissima). However, despite this vigorous growth, the biomass yields in reseeding plots did not exceed 3.5-4.0 t DM/ha.
     Yields of C. lanata and annual Atriplex species were as high as 13 and 12 t DM/ha, respectively: higher than in the

Climacoptera lanata, a halophyte, is an excellent option for biomass production in periods of high fodder scarcity using drainage water in Turkmenistan
drought year of 2001. Yields of S. altissima were lower, and, as in 2001, the lowest yields were observed for perennial Atriplex.
     Interestingly, after the first irrigation in 2001, the emergence of local perennial salt-tolerant species such as Karelinia caspica and Aeluropus litoralis was observed. By mid-July in the second year (2002), the average height of these species was 128.8 and 48.5 cm, respectively. By September 2002, the yields of the same species had reached 7.45 and 2.14 t DM/ha.
     The natural rangeland's biomass production (0.15-3.90 t/ha in exceptional years and 0.10-0.12 t/ha in average years) gives a low carrying capacity of about 6-7 ha per sheep per year. This is even lower during drought years. It is clear that the production of halophytes using drainage water has the potential to enhance the feed base in this production context, particularly in degraded soils with elevated salinity, and offers an alternative option for farmers in Turkmenistan. Trials with animals are now being used to assess the effectiveness of these species in livestock feeding; economic evaluations of these technologies will be reported in the future.