|Title:||THE EFFECT OF VARIETY AND SEED PROPORTIONS ON YIELD, NUTRITIONAL QUALITY AND COMPATIBILITY OF OATS AND VETCH MIXTURES|
Dr. Diriba Geleti
|Keywords:||Biological compatibility;Herbage DM yield;Nutritional quality|
|Abstract:||The present study was conducted to assess the varietal and seed proportion effects on yield, quality and compatibility of oats and vetch mixtures under varying seed proportion (100%, 75%, 50%, 25%) using two varieties for each of the component species. The experiment was conducted in Randomized Complete Block Design (RCBD) with three replications. Seedling count, biomass yield, plant height, vigor and plot cover were collected. Forage quality traits considered for the experiments were DM content, ash, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin, cellulose and hemicelluloses. Relative yield, Relative yield total, Relative crowding coefficient and Aggressivity index were indices calculated for biological compatibility and yield advantages of oats and vetch. Significant (P<0.05) differences were observed for all measured agronomic traits except for plot cover. The highest DMY (17.61) was obtained from the mixture of 75% SRCP × 80 Ab 2291 + 25% Vicia dasycarpa lana. Mean values of Ash, CP, NDF, ADF and cellulose had significant (P<0.05) difference whereas mean values of DM content, ADL and hemicelluloses had non-significant (P>0.05) difference. The highest DMY, CPY and NDFY was showed by the mixture of 75% SRCP × 80 Ab 2291 + 25% Vicia dasycarpa Lana. Relative yield (RY) of oats and vetch varieties were less than one indicating that the yield obtained in the pure stands were higher than those from the mixed stands of the component species for both varieties. The relative yield total (RYT) of most mixed stands were greater than one indicating mixed stands to have superior yield advantage compared to the pure stand plots. The highest RYT value of 1.48, from the mixture of 50% SRCP × 80 Ab 2291 + 50% Vicia sativa ICARDA 61509, suggested a biological yield advantage of 48% in mixed cropping compared to the pure stand plots. The vetch varieties are the dominant except at the seed proportion of 75% +25% oats-vetch mixtures respectively. Generally, the result indicated that vetch species had higher CP and lower NDF than their respective mixtures and pure oats. The DMY, CPY and NDFY of mixtures of 75% oats + 25% vetch and 50% oats + 50% vetch seed proportions were better than pure stands. The RYT values of these mixtures were also greater than one. Therefore, it is concluded mixtures at seed proportions of 75% oats + 25% vetch and 50% oats + 50% vetch had relatively higher yield, quality and better compatible.|
|Description:||A THESIS SUBMITTED TO COLLEGE OF VETERINARY MEDICINE AND AGRICULTURE, ADDIS ABABA UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN TROPICAL ANIMAL PRODUCTION AND HEALTH|
|Appears in Collections:||Thesis - Tropical Veternery Medicine|
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