Abstract
Production and Nutritional Composition of two Annual Ryegrass Cultivars (Diploid and Tetraploid)
Highlights
The feeding cost represent 50 to 78.4% of the total milk production costs Alqaisi et al [1] Baptista et al [2] Sottomayor et al [3] and have an important impact in milk production price
Each ryegrass sample were chemical analyzed for total dry matter (DM), total ash (Ash), crude protein (CP) (N x 6,25) and ether extract (EE) according AOAC (2000) and neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) according to the procedures described by Van Soest et al
With respect to the original equation, this Metabolizable energy (ME) equation results obtained in our study are higher than the results reported includes DM x 4.184 that account for conversion ME data from Mcal to MJ
Summary
The feeding cost represent 50 to 78.4% of the total milk production costs Alqaisi et al [1] Baptista et al [2] Sottomayor et al [3] and have an important impact in milk production price. The milk price paid to Portuguese dairy farmers is one of the five lowest in the European Union (EU). The EU average in the same month was 0.3383 €/kg MMO [4] These facts show that to increase farm profitability it is essential satisfy the nutritional requirements of the dairy cows and reduce the feeding costs. One way to achieve this is to work with a feeding plan based on forage produced on the farm which are often economically more interesting than others feeding plans based on commercial compound whose price dairy farmer don’t control Alqaisi et al [1]. The use of annual ryegrass to feed dairy cows have a positive effect on milk unsaturated fatty acids, in the linoleic and α-linolenic acids Kalač and Samková [9]. The aim of this study is to evaluate the production and nutritional composition of two ryegrass varieties diploid (n2) and tetraploid (n4), cultivated in a Thermo-Mediterranean climate as single culture or binary mixture
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