摘要
Conservation agriculture(CA)is considered as a suitable technique for soil erosion control,productivity enhancement,and improved economic benefits.To investigate these issues,an experiment was conducted under rainfed conditions using grass vegetation strip(VS)with minimum tillage,organic amendments and weed mulch during June 2007-October 2011 at Dehradun,Uttarakhand in the Indian Himalayan region.Results showed that the mean wheat equivalent yield was47%higher in the plots under with CA compared with conventional agriculture in a maize-wheat crop rotation.Mean runoff coefficients and soil loss with CA plots were45%less and54%less than conventional agriculture plots.On average,after the harvest of maize,soil moisture conservation up to 90 cm soil depth for wheat crop was 108%higher under CA than conventional agriculture plots.The net return from the plots with CA was 85%higher,and when expressed net return per tonne of soil loss,it was four and half times higher than conventional practice.Results demonstrate that the suitable CA practice(a grass strip of Palmarosa with applied organic amendments(farmyard manure,vermicompost and poultry manure)along with weed mulching under conservation tillage)enhances system productivity,reduces runoff,soil loss and conserve soil moisture.&2015 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press.Production and Hosting by Elsevier B.V.This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/).
