Abstract

CABALLERO, Aylin; MACEDA, William; MIRANDA, Roberto  and  BOSQUE, Hugo. Yield and protein content of quinoa (Chenopodium quinoa willd), in five phenological stages, under four levels of incorporation of manure. RIIARn [online]. 2015, vol.2, n.1, pp.68-75. ISSN 2409-1618.

ABSTRACT Quinoa is produced in the Southern and Central Highlands of Bolivia and is considered by FAO as a crop that has good quality comparable to milk amino acids. Nitrogen content, basis for the enzymes and proteins in the grain varies with variety and composting level (Schulte et al., 2005), but in addition, the nitrogen concentration is also distributed in different organs of plant. In this sense, the present study focuses on determining the protein content of the different organs of quinoa in the cultivar "Jacha Grano" in five phenological phases underfour levels of incorporation of manure. The research was conducted in the Community of Villa Patarani, Central Highlands of Bolivia. The soils are neutral pH sandy texture, low in organic matter (0.4%) and nitrogen (0.05%). Levels of incorporation of manure were 0, 15, 30 and 60 Mg ha-1. The plots were distributed in a complete blockdesign at random, with three replications. The evaluation consisted of taking samples of plants from different plots in four stages of culture (four true leaves, branching panicle formation and dough stage). Samples were taken to the Laboratory of Chemistry, Faculty of Agriculture - UMSA, where he proceeded to the separation of the different organs of the plant, before being subjected to a temperature of 65 ° C for 48 hrs. After drying, the nitrogen content was determined by Kjeldahl method. Protein content was estimated by multiplying the total nitrogen value of 6.25 for the constant. The results show that there is a higher percentage of protein in the leaves at the phase of true leaves and panicle branch, but in the step of forming the dough stage concentrates the protein content in the grains of the plant, which shows a translocation nitrogen. Likewise, the level of manure, applied to the soil affects the protein content of the leaves and the ground beans.

Keywords : Quinoa; Nitrogen; Protein Level of manure; Bolivia.

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