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Applied and Environmental Soil Science
Volume 2013 (2013), Article ID 835960, 5 pages
http://dx.doi.org/10.1155/2013/835960
Research Article

Residual Effects of Biosolids Application on Forage Production of Semiarid Grassland in Jalisco, Mexico

1Sitio Experimental La Campana, CIRNOC, INIFAP, Km 33 Carretera Chihuahua-Ojinaga, 32910 Aldama, CHIH, Mexico
2Sitio Experimental Vaquerias, CIRPAC, INIFAP, Km 8 Carretera Ojuelos-Lagos de Moreno, 47540 Ojuelos, JAL, Mexico
3Departamento de Zootecnia, Centro de Ciencias Agropecuarias, Universidad Autonoma de Aguascalientes, Avenida Universidad No. 940, 20131 Aguascalientes, AGS, Mexico

Received 31 March 2013; Revised 26 May 2013; Accepted 14 June 2013

Academic Editor: Alejandro Valdecantos

Copyright © 2013 Pedro Jurado-Guerra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Single application of biosolids increases forage production on semiarid grasslands. Residual effects of biosolids on forage production have been scarcely measured in semiarid grasslands. The objective was to evaluate the residual effects of biosolids application on forage production of blue grama (Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths) and other grasses at a semiarid grassland in Jalisco, Mexico. The study was performed at shortgrass prairie in northeast Jalisco. Field plots were selected to include blue grama plants before rainy season in 2002. Aerobic biosolids were applied at 0 (control), 15, 30, 45, 60, 75, or 90 dry Mg ha−1 under a completely random design with five replications. Forage production was estimated by clipping at the end of the growing season during five years. Data analysis was performed with linear mixed model and repeated measures. Forage production was influenced by a rate × year × species interaction ( ). Blue grama forage production increased with increasing biosolids rates during all years, with the magnitude of this response varying among years. Forage production of other grass species slightly decreased with biosolids application. Single biosolids application had a residual effect on forage production throughout five years in semiarid grasslands.