000 08731nab a2201393 a 4500
001 AR-BaUFA000382
003 AR-BaUFA
005 20190619090242.0
008 181208t2012 |||||o|||||00||||eng d
022 _a0167-8809
024 _a10.1016/j.agee.2011.05.031
040 _aAR-BaUFA
100 1 _aCaride, C.
700 1 _aPiƱeiro, G.
700 1 _aParuelo, J. M.
245 0 0 _aHow does agricultural management modify ecosystem services in the argentine Pampas?
_bthe effects on soil C dynamics
773 _tAgriculture, Ecosystems and Environment
_gVol. 154 (2012) 23-33
520 _aCrop management modifies the structure and functioning of the ecosystems. C dynamics has been identified as a key intermediate or support ecosystem service that is profoundly altered by agricultural practices. The temperate grasslands of Argentina, the Pampas, are one of the main crop production regions of the world. Crop sequence, tillage and fertilization change inputs and outputs and, consequently the whole C dynamics. Our objectives in this article were [i] to provide a spatially explicit characterization, based on remotely sensed data, of crop sequences and tillage systems in the Rolling Pampas, [ii] to evaluate changes in C gains by computing the absorbed photosynthetic active radiation [APAR] from NDVI data of different crop, [iii] to evaluate the soil organic carbon [SOC] balance of different management schemes [crop sequence, conventional tillage vs. no till and three levels of nitrogen fertilization] using the CENTURY model, and [iv] to estimate the changes in SOC at a regional level. The results showed that 54 percent of the area was under continuous agriculture, with only two crop rotations occupying 61 percent of the area, and the main tillage system was no-tillage [73 percent of the area analyzed]. Annual APAR was lower in crops than in rangelands, except for wheat-soybean double crop. Based on CENTURY simulations the crop management which had a most negative SOC balance [SOC reference value [100 percent]=79tha -1] was crop sequence "maize/soybean" under conventional tillage and with no fertilizer application [37 percent losses of SOC in 60 years]. The management that presented the most positive SOC balance was "soybean/wheat-soybean double crop [6 years] pasture [4 years]" under no till and with high fertilization [10 percent increase of SOC in 60 years]. A positive and linear relationship was found between APAR estimates derived from satellite data and simulated SOC providing basis for a quantitative hypothesis on the importance of C inputs on SOC's dynamics. At regional scale, if crop sequences proportions remain constant, the lost of SOC would average a 15 percent in 60 years.
653 0 _aAPAR
653 0 _aCARBON
653 0 _aGRASSLANDS
653 0 _aMODIS
653 0 _aMONTEITH MODEL
653 0 _aSOC
653 0 _aAGRICULTURAL MANAGEMENT
653 0 _aAGRICULTURAL PRACTICE
653 0 _aCARBON FLUX
653 0 _aCONSERVATION TILLAGE
653 0 _aCROP PRODUCTION
653 0 _aECOSYSTEM FUNCTION
653 0 _aECOSYSTEM SERVICE
653 0 _aGRASSLAND
653 0 _aORGANIC SOIL
653 0 _aPHOTOSYNTHETICALLY ACTIVE RADIATION
653 0 _aRANGELAND
653 0 _aREMOTE SENSING
653 0 _aSATELLITE DATA
653 0 _aSOIL CARBON
653 0 _aSOYBEAN
653 0 _aTEMPERATE ENVIRONMENT
653 0 _aWHEAT
653 0 _aZERO TILLAGE
653 0 _aARGENTINA
653 0 _aPAMPAS
653 0 _aGLYCINE MAX
653 0 _aTRITICUM AESTIVUM
856 _uhttp://ri.agro.uba.ar/files/intranet/articulo/2012Caride.pdf
_iEn reservorio
_qapplication/pdf
_f2012Caride
856 _uhttp://www.elsevier.com/
_zLINK AL EDITOR.
900 _9v2
900 _9v3
900 _9v4
900 _9v4
900 _9v5
900 _9v6
900 _9v7
900 _9v8
900 _9v15
900 _9v16
900 _9v20
900 _9v21
900 _9v21
900 _9v21
900 _9v22
900 _9v22
900 _9v22
900 _9v25
900 _9v25
900 _9v25
900 _9v36
900 _9v50
900 _9v51
900 _9v52
900 _9v53
900 _9v56
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v62
900 _9v69
900 _9v70
900 _9v72
900 _9v75
900 _9v76
900 _9v85
900 _9v93
900 _9v98
900 _9v101
900 _9v102
900 _9v103
900 _9v109
900 _9v856
900 _9v999
942 0 0 _cARTICULO
942 0 0 _cENLINEA
999 _c46816
_d46816