Costs and Benefits of TFaditional and Improved Dry SeasonFeeding Systems of Dairy Cattle for Smallholder Farmers in thePeruvian Andes

Resource use efficiency and diversity in agroecosystems

Costs and Benefits of TFaditional and Improved Dry Season Feeding Systems of Dairy Cattle for Smallholder Farmers in the

Peruvian Andes

KRzuN BeRrLl, CARros A. GouBz2, HANS-DtBren Hnss3, ANonp.q.

ConrNNe MaynRl, MICHABT- KRBuzrRl, FurERrco HolnRNNa

3 A g ro s c o p e Li eb efe td- Po s i e ux Re s e arch S t at io n ( ALP ), Sw it ze rland 4Intemational Centre for Tropical Agriculture (CIAT), Colombia

During the dry season, lack of precipitation reduces growth and quality of non-irri- gated forage resources in the central Peruvian Andes, resulting in a reduction of milk yield and milk quality. In four Andean communities, 56 farmers were interviewed every three months over a period of one year. Information linked to agriculture and livestock farming such as activities, inputs (labour, means of production, capital) and outputs (milk, cheese, meat, animals, crops) were recorded using a closed-ended ques- tionnaire. Furthermore, samples of supplements for dairy cattle were analysed for their contents of crude protein (CP), fibre (NDF) and net energy for lactation (NEL).

The most common supplements during the dry season were a home-made concentrate (with flour and bran of oat and barley as main components), oat hay and straw (from barley or oat), which contained on average, per kg of dry matter (DM) 1 19, 57 and 40 g of CP, 324, 572 and 731 g of NDF, and 7.7,5.5 and 4.1 MJ of NEL, respec- tively. The communities were divided into two groups with high (CH) and low (CL) level of dependence on income from milk production. On average, each household owned 4 and 0.5 dairy cows producing 550 and 750kg milk/cow/year, in CH and CL groups, respectively. Values derived from the survey were introduced into a simu- lation model which optimised household income through linear programming. The model was used to compare the traditional dry season feeding system, consisting of supplementation of dairy cows with hay and straw from oat and barley, cut ryegrass (Lolium sp.) and small amounts of cereal bran with an improved system introducing the hay of improved forage varieties (Avena sativa var. Mantaro 15, Hordeum vul- gare vaL UNA 80, Triticosecale Wittmack). The best land use solution proposed by the model was a combination of fertilis ed Lolium sp., fertili sed Hordeum vulgare yar.

UNA 80 and native pasture. Farm income from livestock would rise with this new system from 199 to 211 Us$/halyear for CH and from 32 to 277 Us$lhalyear for CL, demonstrating clear improvements achieved by small changes in land use and animal feeding practices.

Keywords: Dry season feeding, household model, milk production, Peru

Contact Address: Karin Bartl, Swiss Federal Institute of Technology (ETH), Inst. of Animal Sciences, Zurich, Swi tzerland, e-mail : kari n.baal @ i nw.agrl.ethz.ch

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