Feed and Nutrition Featured Articles
Feed and Fodder Challenges for Asia and the Pacific
Thursday, March 07, 2013
Harinder P.S. Makkar, Animal Production Officer with the FAO in Rome explores the options to address feed and fodder challenges in Asia in the coming years. He focuses on making better use of feed resources, seeking alternative feeds and fodders and putting a greater emphasis on ruminants to provide animal protein as they can use food sources that humans cannot.
Feed and fodder play a central role in providing proper nutrition to livestock. The feeding of a diet balanced in all nutrients and at a level that meets the production objective considering the animal’s physiological state is imperative for achieving high and sustained livestock productivity.
According to the author, whose paper was published in an FAO report, 'Asian livestock: Challenges, opportunities and the response', the proceedings of an international policy forum held in Bangkok, Thailand in August 2012, the success of animal reproduction and health programmes rests on proper nutrition. Improper feeding leads to productivity losses and increase in emission of pollutants in the form of methane (up to 12 per cent of feed energy is lost in the form of methane) and nitrogen and phosphorus release (60 to 70 per cent of the nitrogen and phosphorus fed in intensive production systems is lost to the environment) in soil and water channels, which if not managed properly could cause water pollution, resulting in erosion of biodiversity, deterioration of human health and decrease in agricultural productivity (Van Horn 1998; IAEA 2008).
Proper animal nutrition, therefore, plays an important role in addressing ongoing and emerging challenges imposed by increasing human population, global warming, land degradation, water shortage and pollution, biodiversity erosion and increasing energy prices.
During the last couple of decades, both production and consumption of animal products have substantially increased. In 1975, Asia’s contribution towards world meat production was 18 per cent, which increased to 42 per cent in 2010, and the corresponding values for milk production were 12.7 per cent and 35.9 per cent respectively (FAOSTAT 2010). The average per annum consumption of animal products of a person in Asia is lower than the world average – meat consumption is lower by approximately 25 per cent and milk consumption by approximately 40 per cent.
In the next four decades, the world consumption of animal products is projected to double what it is today (FAO 2011a) and a large part of this increase will be in Asia. If we take feed conversion ratios of approximately 2, 4 and 9 for poultry, pigs and cattle, respectively, and also consider carcass percentages, a high demand for feed will ensue by 2050. It is a challenge especially when we are faced with: a) increase in population, b) decrease in arable land for crop production, c) water shortage, d) food-feed-fuel competition, e) limited supply of phosphorus, f) frequent climate extremes, g) increasing animal and human health risks and h) economic instability.
This paper attempts to propose some options to address feed and fodder challenges.
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"The animal industries in emerging economies in Asian are heavily dependent on import of feed and feed ingredients"
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Feed Trade and Feed Shortage and Their Implications
In 2011, China imported approximately five million tonnes of maize - in 2012, a decrease in import was recorded - largely for use as feed; and a sharp increase in demand for animal products in China could increase its maize import four-fold by 2020 (USDA 2012). The Philippines, Thailand and Viet Nam are also projected to import 1.9, 1.2 and 0.7 million tonnes of maize, respectively, by 2025 (Falcon 2008). In the last 20 years, import of soybean in Asia has also increased by seven-fold (FAOSTAT 2010). The animal industries in emerging economies in Asian are heavily dependent on import of feed and feed ingredients. Any disruption in trade or increase or extreme volatility in cost of feed could be detrimental for the animal food industry and therefore impact food security.
There is a chronic shortage of feed in Asian countries. As an example, in 2009 shortage of feed in India was of the order of 162.6 million tonnes of crop residues and 79 million tonnes of green fodder as dry matter. In 2020, India is expected to need 526 million tonnes of dry matter, 56 million tonnes of concentrate feed and 855 million tonnes of green fodder (as fed) (Dikshit and Birthal, 2010).
In 2011, in China, maize and soybean shortages were estimated to be 15 million tonnes and 60 million tonnes, respectively. By 2015, feed requirement by the swine industry in China is projected to be 75 million tonnes, with a shortage of seven million tonnes (C. Wang, Institute of Dairy Science, Zhejiang University; personal communication). The same is the situation with Thailand, which is, and will remain, a major meat-exporting nation in Asia.
There is need for Asian countries to enlarge their indigenous feed resource base and rely more on locally available feed resources and their efficient use. To this end, Asian countries should also consider increasing fodder production, which would decrease reliance on imported feed ingredients and also decrease cost of feeding. Lower costs of protein and energy supply from fodder/forages than from concentrates has been recorded (Salgado et al., 2012). Development of the animal industry based on locally available feed resources is expected to decrease livestock’s carbon footprint and reliance on the trade.
By 2020, the projected increase in poultry meat requirement in India is nine million tonnes and in order to meet this requirement, an additional 27 million tonnes of feed would be required (Robinson and Makkar 2012), which translates to an additional protein requirement of approximately six million tonnes (equivalent to 60 million tonnes of cereals or 2.4 million tonnes of soybean; Makkar 2012a).
For meeting the 2020 production targets of meat from poultry and pig sectors in Asia, feed protein requirement is expected to be 132 million tonnes – double that consumed by these two sectors in 2009. To obtain 132 million tonnes of protein, 1.32 billion tonnes of cereals or 330 million tonnes of soymeal are required.
With the currently used monogastric feeding systems, almost 100 per cent of the feed protein required competes with food. A huge increase in the requirement of feed protein for monogastric animals in the future could further adversely impact food security. Policy and research attention must be paid to decreasing dependence of livestock production on feed ingredients that compete with human food.
Options for Enhancing Feed and Food Security
Make the Best Use of Available Feed Resources
Enhance efficiency of available feed resource use: According to a famous management quote, 'If you cannot measure it, you cannot manage it' and most developing countries do not have a National Feed Inventory (NFI). The inventory should contain information on type and quantity of feed resources and during which period of the year (when) these are available. Information provided by livestock feed inventories would be of immense use for policy-makers, government agencies, non-government organizations, intergovernmental agencies and development agencies, among others in formulating and implementing sustainable livestock development activities and in preparing and coping with climatic variations such as droughts, floods, severe winter weather events and global climate change.
Spatial and temporal assessments of current and forecasted feed resources, including forages, will assist in disaster management and policy-making. Feed assessments would also enable informed decision-making related to the nature and quantities of commodities, the feed resources that could be traded locally, potential areas for feed markets and feed resources involved in imports and exports.
Estimates of feed resources and demands are needed to assess the fractions of food grain that is used for feed. Although livestock feed shortages have clearly constrained productivity in many countries, the impacts of feed shortages at national levels have been poorly characterised due to the lack of national-scale feed assessments. In addition, information on the availability of feed ingredients at the country level will enhance the efficiency and profitability of the animal feed industry and assist researchers to formulate sustainable feeding strategies. Such information would also be useful for determining the input-output relations for countries, e.g. the estimation of edible protein outputs versus protein inputs.
Estimates of feed resources would also improve the accuracy of assessments of the environmental impacts of livestock resulting from land-use transformations as well greenhouse gas (GHG) emissions and element fluxes (e.g. nitrogen) associated with livestock production. Production and consumption of feed significantly affects the potential of ecosystems to sequester carbon.
Country-level feed balances based on feed inventory data will facilitate planning within the livestock industry, e.g. in determining how many animals can be supported or produced based upon existing feed resources, and in identifying what feed resources would and could be developed to achieve production objectives. Such efforts will, in turn, translate into enhanced food security balanced with environmental sustainability.
A manual containing methodologies, tools and guidelines for establishing and maintaining NFIs is available (FAO 2012a), the use of which would assist countries to generate the required feed-related information.
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"In addition to shortage of feed, imbalanced nutrition is one of the major factors responsible for low livestock productivity."
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Implement balanced feeding: In addition to shortage of feed, imbalanced nutrition is one of the major factors responsible for low livestock productivity. Balanced nutrition - supply of nutrients based on the physiological conditions of the animal and keeping in view the objective of raising an animal - contributes to improving animal output as well as to reducing both the cost of production and the emission of greenhouse gases per unit of animal product produced.
A number of software programs are available for preparing balanced rations, which are used by professionals looking after big commercial farms, both in the monogastric and ruminant sectors. However, in the smallholder dairy and beef sectors, the feeding of imbalanced feed is widely prevalent as many farmers are unskilled in preparation and feeding of balanced diets. As a result, animal productivity is low and feed C and N get wasted and are not utilised efficiently in animal products, causing excessive release of greenhouse gases. Imbalanced feeding also causes metabolic and behavioural stress in animals.
A ration-balancing programme, being implemented by the National Dairy Development Board of India in 50 villages and on 3,100 animals, has demonstrated an increase in net daily income of farmers by 10 to 15 per cent through an increase in milk production and a decrease in feed cost. Milk production efficiency (fat-corrected milk yield/feed dry matter intake) of cows increased by 34 per cent, implying that more milk was produced from 1kg of feed when using balanced rations.
Feeding a balanced ration to dairy animals reduced faecal egg counts of internal parasites and increased levels of the serum immunoglobulins IgG, IgM and IgA, suggesting improved animal immunity. Furthermore, feeding balanced rations also reduced enteric methane emissions by 15-20 per cent per kilogram of milk produced and increased efficiency of microbial protein synthesis (FAO 2012b; Garg et al. 2013).
Large-scale implementation of such programmes can help improve the productivity of livestock raised by smallholder farmers. It has also been recorded that correction of mineral imbalances enhances animal productivity (FAO 2011b). Similar approaches can also be adopted for adolescent and beef animals, by taking into consideration local feeding and management conditions. Smallholder production systems contribute over 65 per cent of the milk production and over 55 per cent of meat production and hence targeting smallholder farmers should be the priority.
Concerted efforts in other countries and donor participation in the programme will be catalytic to delivering the benefits of ration-balancing programmes to farmers. In addition, implementation of such a programme at the grassroots level will enhance resource-use efficiency and decrease the release of environmental pollutants from livestock production systems.
Integrate quality control system in feed analysis: In preparing and feeding a balanced ration, it is imperative that the chemical composition of feed ingredients is reliably known. Field experiences show that such data originating from many laboratories in Asian countries are not reliable because quality control systems and good laboratory practices are not integrated in the feed analysis. A manual to address these issues has been produced by FAO (FAO 2011c). Science managers and feed industries must ensure that the quality control systems and good laboratory practices are used on a routine basis in feed analysis laboratories.
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"Improving the management of crop residues as animal feed should be one of the main priorities"
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Reduce loss of feeds: In many Asian countries, for example India, Bangladesh, Pakistan, Myanmar and Indonesia, ruminant production is largely based on feeding of crop residues and agro-industrial by-products. However, these resources need to be properly managed. Straw worth millions of dollars is burned every year in many parts of Asia, causing environmental problems and soil degradation, in addition to loss of this valuable feed resource. In India alone, burning of crop residues releases CO2, CO, CH4, N2O and SO2, equivalent to 6.6 million tonnes of CO2 annually (INCCA 2007).
Improving the management of crop residues as animal feed should be one of the main priorities. There is an urgent need to optimize use of the limited feed resources, including straw for ruminant feeding.
Crop residue management could include the use of specially-designed balers for collection of straw from the field, followed by the use of processing technologies for the manufacture of balanced complete feed for ruminants.
In this respect, the technology for making densified total mixed ration blocks (DTMRBs) or densified total mixed ration pellets (DTMRPs) based on straw and oilseed meals is an innovative approach, which provides an opportunity for feed manufacturers and entrepreneurs to remove regional disparities in feed availability and to supply the balanced feed to dairy and other livestock farmers on a large scale. The DTMRB or DTMRP technology can also be effective in disaster management and emergency situations that arise due to natural calamities, for example floods, droughts and human conflicts.
Feed banks could be set up to overcome the problem of feeding animals during these natural calamities, which are common in the tropics. The method for preparation of DTMRBs and DTMRPs and advantages of their feeding are given in FAO (2012c). Their feeding increases animal productivity and decreases wastage of feed ingredients, including straws.
From the discussions at the FAO e-conference on 'Successes and failures with animal nutrition practices and technologies in developing countries' (FAO, 2011b), it could be surmised that application of technologies such as urea-ammoniation of straw and urea-molasses blocks that aid in enhancing the efficiency of utilisation of crop residues and low quality forages has been success in areas where the extension services and farmers’ linkages to the market were good.
In addition, the discussions suggested that adoption of these technologies would be higher if the straw treatment and preparation of the blocks are conducted at a community/cooperative level or by private entrepreneurs since it reduces the operational cost and relieves the farmers from devoting time and efforts for the treatment of straw or preparation of the blocks. Despite overall negative impression prevailing about the relevance of these technologies, there seems to be potential, under some situations, for generating impact at the farmers' level using these technologies.
In addition, feeding of total mixed rations has also been shown to have several advantages such as decrease in feed loss, higher nutrient availability, lower enteric methane production and higher animal performance over feeding ingredients separately (FAO 2011b; FAO 2012b), which is conventionally practised in most Asian countries. Information on the production and feeding of these rations should be widely disseminated.
Other simple technologies, such as chopping of forages, increase animal productivity and reduce waste of forage. Animals consume considerable energy in chewing forage and chaffing allows saving of this energy and its diversion for productive purposes. Intake of chopped forage is higher than unchopped forage (FAO 2011b).
Silage-making, especially using locally available resources as done in Bangladesh (FAO 2011b), is also an attractive approach for reducing wastage of forages whose availability is high in rainy seasons. In some months of the year availability of vegetable and fruit wastes is also high which can also be converted into a valuable resource through silage making. These resources can be used for feeding during the dry season when availability is low. These approaches convert 'disposal problems into opportunities for development'.
Due to lack of proper storage conditions, fungal infestation of feed ingredients such as cottonseed cake and maize is a chronic problem in many Asian countries. Moist conditions lead to production of mycotoxins by the fungus present, which decrease productivity and animal and human health. According to an estimate, losses in the Philippines, Indonesia and Thailand are approximately US$900 million per annum due to aflatoxin alone (Schmale and Munkvold 2012). Aflatoxin is one of the many toxins produced by fungus. Substantial feed losses in Asian countries can be prevented by using proper postharvest technologies.
The application of afore-mentioned approaches will also contribute to producing more animal products per animal unit.