Weeping Lovegrass Yield and Nutritive Value Provides an Alternative to Beef Cattle Feeding in Semiarid Environments of Argentina

Abstract

Weeping lovegrass[Eragrostis curvula (Schrad.) Nees] supports extensive beef cattle operations in arid and semiarid environments worldwide. This perennial grass is preferred in low production areas of Argentina because it has a high biomass production with minimal management requirements. Therefore, we evaluated yield and nutritional value of seven different cultivars and accessions of weeping lovegrass in a field experiment during two consecutive years (Two tetraploid cultivars (Tanganyika and Morpa), three hexaploid cultivars (Don Pablo, Don Juan, and Don Eduardo), and two accessions (UNST9355 and UNST9446) were included in a complete randomized block design. To evaluate yield and nutritional value, dry weight, leaf length, crown diameter, crude protein, in vitro dry matter digestibility (IVDMD), neutral detergent fiber, acid detergent fiber, and lignin were determined. Biomass and IVDMD data indicated that hexaploid cultivars performed better than tetraploid ones under limiting environmental conditions observed throughout the study. Therefore, we concluded that breeding programs could select suitable parents from hexaploid cultivars such as Don Pablo and UNST9446 to be used in arid environments while tetraploid cuitivars such as Tanganyika and Morpa could be used In environments with less water restrictions.

Yield, resource use efficiency and trace metal uptake of weeping lovegrass grown on municipal sludge‐amended soil

“…Higher protein content (80–160 g kg −1 ) in a given feed is usually desirable for maintenance, growth, production and normal feed intake and functioning of rumen microflora. Generally, the CP content for all treatments from this study was within the range reported for weeping lovegrass (63–175 g kg −1 ) . It was also above the minimum crude protein requirement of ruminants (70–80 g kg −1 )…”

“…Generally, the CP content for all treatments from this study was within the range reported for weeping lovegrass (63-175 g kg −1 ). 25,26 It was also above the minimum crude protein requirement of ruminants (70-80 g kg −1 ). 24 The year × sludge application treatment interaction for CP was primarily caused by CP magnitude differences among years.…”