PS 11-90
Atriplex canescens evaluation bush for 30 years of exclusion and grazing in different seasons in northern Mexico
The scarcity of forage in rangeland of northern Mexico is becoming more serious, currently in the American Southwest and northern Mexico have been hit by the effects of climate change causing major changes in the structure and functioning of ecosystems year using some shrubs such as saltbush ( Atriplex canescens ( Pursh ) Nutt. ) , can be a feeding strategy because of its high nutritional value while improving ecosystem . Therefore, the use of shrubs improves the productivity of rangelands , the aim of this study was to determine whether the exclusion and / or livestock grazing affect dry matter production of saltbush scrub parvifolio helpless in northern Mexico . Production of dry matter in kg / ha during the four seasons (2012-2013) ( free-range grazing vs exclusion ) Was determined , the plots are distributed in two sites. To collect forage samples quadrant method was used. The data were analyzed using PROC GLM of SAS
Results/Conclusions
Based on the results obtained were found to be highly significant difference (p> 0.0001) between seasons and between treatments exclusion of grazing and free grazing (p> 0.0022). With the above we conclude that the shrubs that remained exclusion can we improve the productivity of rangelands and solve the shortage of fodder in times of crisis, while where there was pasture there that implementing some management strategies to reduce the negative effects of over-consumption this shrub for livestock.