Management and utilization practices of natural pasture in Western Ethiopia

A survey was conducted in highland and mid altitude areas of Horro and Guduru districts of Oromia Regional States, Western Ethiopia with the objective of assessing the management system and status of grazing land. A single-visit multi subject formal survey method was followed to gather data about grassland holding, management systems and livestock holding. A total of 210 respondents, 60 from highland and 150 households from mid altitude were selected and interviewed. Data were collected and analyzed using discriptive stastics. The result showed all households of highland and 89.3% of mid altitude had private grazing land. About 38.3%, 61.7% and 100% of surveyed households of highland and 17.33%, 64% and 98% of mid altitude households respectively have practice of cut and carry, paddock feeding and free grazing systems of grazing. The practice of natural pasture preservation in the form of closure was very common and practiced by 95% of highland and 67.33% of mid altitude surveyed households with overall mean of 75.2%. Only few farmers, about 16.7% of highland and 29.33% of surveyed household of mid altitude have practice of hay making, while the practice of silage making was not known in both agro ecologies.The cause for the decreasing size of grazingland was ranked by the respondents. The major causes were listed as cultivation, expansion of towns (villagizations), investments and land allocation for social services (church, health services, offi ces). Accordingly the contribution of cultivation, expansion of twons, social services and investments were ranked as 1st,2nd,3rd and 4th respectively in highland, while cultivation,land allocation for social service, expansion of towns and investment ranked as 1st, 2nd, 3rd and 4th cause respectively in mid altitude. The cause for the deterioration of quality of grazing land was ranked similarily in both agro-ecologies. Accordingly disappearance of better and quality species was ranked 1st cause, expansion of invasive plants 2nd and depletion of soil as 3rd cause. Improved herding system like herd spliting in which different species of different feeding habit are kept separately were less known in both agro-ecologies. Therefore improved forage development with good practices of conservation and good livestock management systems should be focus of intervention in both agroecologies. Research Article Management and utilization practices of natural pasture in Western Ethiopia


Introduction
Livestock is an important and integral part the agriculture sector of Ethiopia. The subsector contributes about 16.5% of the national Gross Domestic Product (GDP) and 35.6% of the agricultural GDP [1]. It also contributes 15% of export earnings and 30% of agricultural employment [2]. The livestock subsector currently support and sustain livelihoods for 80% of all rural population.
The population of livestock of Ethiopia is believed to be the largest in Africa and an estimate indicates that the country is a home for about 54 million cattle, 26 million sheep and 24 million goats,1.9 million horse, 6.8 million donkeys, 0.4 million of mules and 0.9 million camels [3]. Of the total livetsock population of the country, about 75% of the cattle, 75% of the sheep and 34% of the goat population in Ethiopia are found in the highlands.
Despite high livestock population and existing favorable environmental conditions, the current livestock output of the country particularly in highland mixed crop livestock production system is little. For example the milk output per cow is estimated 1.3 litres per day [3]. This is associated with a number of complex and inter-related factors such as inadequate feed and nutrition, widespread diseases, poor genetic potential of local breeds, market problem, ineffi ciency of livestock development services with respect to credit, extension, marketing, and infrastructure [4][5][6][7][8].
The grassland region of Ethiopia accounts for some 30.5 percent of the area of the country and is most extensive in the western, southern and south-eastern semi-arid lowlands. On the more humid side, open grassland and grassland with some trees are common; grasses may cover as much as 90 percent of the area [9].

Household resources
Average age of respondents, household size, land holding and use pattern and livestock holding of surveyed households is shown in Table 1. There was no signifi cant difference in age of surveyed households. The average family member reported were similar (P>0.05) it was 7.1 for highland and 6.9 for mid altitude. The results of the analysis show that the overall average family size per household (hh) was 6.9 and was comparably higher than 5.6 members/households reported for Dendi districts of central part of Ethiopia [15] and comparably similar with 6.98 members reported for Mulu-Sulula and lower than family size of 8.10 members reported for Degem [16]. The result of the present study also showed that the average landholding per hh of the two ago-ecologies were similar (P>0.05). There was signifi cant difference (P<0.001) in livestock holding between highland and mid altitude areas of the present study areas. The large population of livestock holding of highland could be due to the prevailing larger area of grazing land and the probable less incidence of disease that could exist in highland (Table 1 and PRA result).
Type of grazing land: The type and owner ship of grazing lands of surveyed households of highland and mid-altitude areas of Horro and Guduru districts is dipicted in the Table 2 below. Two types ownership of grazing lands were identifi ed, i.e. communal and private grazing land (Table 2). Due to expansion of cultivation land at the expense of communal grazing land and depletion of the remaining communal grazing land as a result of over grazing; the large segment of the community keep a portion of cultivable land for private grazing.
As a result all surveyed households of highland and 89.3% of mid-altitude have their own grazingland. The average private grazing land size holding per surveyed households of highland %, 0.9 and 0.2 % animal feed is obtained from natural grazing, crop residues, hay, byproducts and improved feeds respectively. The natural pasture which is the contributer of major feed of livestock is characterized by seasonal fl uctuation in total Dry Matter (DM) production and nutritional quality because of the distinct seasonal variation in plant growth, in relation to the annual rainfall pattern.
Given the importance of livestock in the country, the implementation of any livestock improvement program, and the effi cient use of available feed resources demands understanding the prevailing status of feed resources and knowing practices of managing available feed resources of the rural community. Therefore, the present study was designed to assess the prevailing management system and status of grazinglands in Western highland and mid altitude areas of Ethiopia.

Description of the study area
The study was conducted in Horro and Guduru districts of Horro Guduru Wollega Zone of Oromia Regional state, Western Ethiopia. The two districts are found between 36 o -37 o E longitudes and 9 o -10 o N latitude. They are found at altitude that ranges between 1450 -3100 and 1500-2450 m. a. s.l. respectively for Horro and Guduru districts. The mean anoual rainfall ranges between 1350-1400 mm. They have mean temprature that ranges between 12-32 o C respectively [10,11].

Sampling procedures
Assessment of grazingland management: A single-visit formal survey method [12] was followed to gather data about grassland holding and management systems of the study areas. Informal survey and group discussions were conducted with elders, key informants, and development agents working on the sites and district administrative offi cers. The information gathered through the above process were summarized and used as a basis to design a semi-structured questionnaire to quantify the most important parts of the study and the households were taken as a unit of analysis. Trained enumerators were used to assist in the collection of the data.
Pre test questionaire was used to study the type of grazingland owened, management, and status of grazing land. The districts was stratifi ed into two using altitude as crateria [9,13,14]. Accordingly, the kebeles; which are the lowest administrative units in the study districts were grouped into two agro-ecological zones. Finally, a total of 210 households of which 60 from highland and 150 households were selected from mid altitude randomly based on the proportional number of households and the size of each stratum.

Staistical analysis
The computer software Stastical Package for Social Siences (SPSS of version 17.0) was employed to analyze data of survey work. An inidices were calculated for ranking data using the formula: Index = ∑ of [3 for rank 1 + 2 for rank 2 + 1 for rank 3] for overall reasons/criterias.  In this local areas this time is also known by name "Gadhisii" meaning livestock are released free of herding men for grazing (PRA result).
Grazing systems of grassland: The production system practiced in highland and mid altitude areas of Horro and Guduru districts is crop livestock production system [18].
However the grazing systems practiced in these areas varies according to season, size and type of grazing land and size of individual livestock. Extensive grazing, paddock feeding and Cut and carry system are listed as major grazing system of the two agro-ecologies. Furthermore, tether feeding is recently started by farmers owning very few livestock on road side (   revealed none of the respondents of the two agro-ecologies has started or know silage making. The enclosed grazing land is majorly used for paddock feeding which is traditionally known as 'Kuta' grazing. This type of grazing involves feeding a portion of enclosure fi rst and then shifting to ungrazed portion after the fi rst portion is well grazed and this will continues until the whole enclosure is well reported to be the main cause respectively. In these areas, during the wet season, grazing lands contain a signifi cant proportion of wild Trifolium species which is grazed prior to full blooming causing incidence of bloating which result the affected animals often death within a short period of time especially in mid wet season. Other invasive and noxious plants like Raphanus raphanistrum (gommene), Parthenium hysterophorus were also reported to be the most invedors. This conforms to the general idea that overgrazing of natural grazing lands results in invasion of unpalatable weeds and woody plants [9,[23][24][25].
grazed. In this system of grazing ('Kuta'system), priority of feeding is given according to the age, and species of the animal. Accordingly small ruminants and calves are allowed to graze fi rst, followed by matured cattle and then equines are allowed to graze fi nally in mixed with other live stocks.
Feed prioritization and herding system: In both agroecologies of the present study areas surveyed households has reported that there is traditional knowledge of selective feeding their productive animals according to their economic importance, physiological status and their health. Accordingly oxen are the fi rst, lactatining cows are the second and fattening animals are 3 rd prioritized in feeding and sick and pregnant cows are 4 th and 5 th respectively (Table 5). This selective feeding of productive animal is a good indication of their understanding of the role of proper feeding in enhanced productivity of their animal and need to be adopted in other parts of the country for better livestock sector improvement of the country.

Farmers' perception on the status of grazing land
Size of grazing land: The perception of surveyed households on status of grazing land for both agro-ecologies is presented in Table 6 below. According to the perception of respondents of the two agro-ecologies the allocation of grazing lands for cultivation, expansion of town, investment and expansion of social services were listed as the main causes for the decline of the size of grazingland. All rsepondents of highland and 99.3 % of the mid altitude raised expansion of cultivation land as the fi rst cause for the decreasing size of grazingland and the share of the rest reasons were minimal. Similar observations were also reporeted for Ginchi and Bosona districts of Ethiopia [20][21][22]. This indicates that the demand for integration of improved forage development and crop production so as to sustain the lives of the poor farming communities of the areas. Quality of grazing land: almost all surveyed household of the two agroecologies believe that the quality of grazingland is decreasing ( Table 6). Disappearance of nutritious and palatable species, expansion of invasive plants, and depletion of soil fetility were   Therefore weed control and weeds are major problems in both perennial and annual pasture and forage crops and needs to be controlled.

Conclusion
Grassland is the major feed resources for livestock in the study areas especially during rainy season June to December.
The trend of reserving grazing land for private use was entirely practiced by all respondents of highland and by majority of mid-altitude residents. Free grazing on both communal and private grazing land and paddock feeding on private grazing land were the major grazing system. While, Cut and carry system practiced by only few household of the study areas. The practice of pasture conservation in the form of silage was totally absent in agro-ecologies while, few respondents have started   conserving pasture in the form of hay and the use of pasture land in the form enclosure was very common in both agroecologies. Almost all surveyed household agree that the size of grazing lands were drasticaly decreased due to expansion of cultivation land, investments and expansion of cultivation land and some social service. They blieve that the quality of grazing land has also decreased as a result of disappearance of highly palatible and quality species, invasions of invasive weeds and depletion of the soil. Mixed species herding was practiced in both agro-ecologies. This entails herding of animals of different feeding habit (grazers and browsers) together. Therefore, based on the result the following recommendations are forwarded for improving pastureland and livestock development in the areas.
• The practice of land allocation for private grazing should be encouraged with the improved feeding systems.
• Conservation of pasture in the form of silage and hay should be a close intervention area to mitigate feed shortage that might be the cause for low performance of livestock especially during dry season.
• There is a need to integrate crop with high yielding and quality forage species to improve feed shortage that might arise as a result of cultivation, investment and allocation of land for social services and decrease in the quality of grazing land.
• The indiscriminate continuous grazing and absence of control over the communal grazing land needs due attention through improved management system and participation of the community.