Shifting crop-pasture rotations to no-till annual cropping reduces soil quality and wheat yield

Ernst, Oswaldo; Dogliotti, Santiago; Cadenazzi, Mónica; Kemanian, Armen R.

doi:10.1016/j.fcr.2017.11.014

Cited by 36 publications

(30 citation statements)

References 46 publications

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“…On the other hand, SOC contents in 2014 for 50NT, 75NT, and 100NT averaged 30.8 g kg −1 (Table ). Therefore, despite SOC content in 1994 was low (Puget & Lal, ), OC sequestration in the arable layer under NT was negligible even when cropping was rotated with pastures (Ernst, Dogliotti, Cadenazzi, & Kemanian, ). However, 50NT and 75NT showed a slight increase in SOC at 0–20 cm depth along the 20 yr analyzed.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen mineralized in anaerobiosis as indicator of soil aggregate stability

et al. 2020

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Monitoring soil health status is imperative to pursue sustainable agriculture. Aggregate stability (AS) is fundamental to define several soil functions and, therefore, physical soil health. The objectives of this work were to (i) evaluate the effect of contrasting cropping systems on AS, soil (SOC) and particulate (POC) organic carbon, and anaerobic nitrogen (AN) both in bulk soil and in macroaggregates (MA), and (ii) assess the relationship between AS and AN both in bulk soil and in MA to facilitate soil physical health monitoring. Aggregate stability, AN, SOC and POC were evaluated at three depths (0–5, 5–20, and 0–20 cm) in a Mollisol of the Southeastern Argentinean Pampas under a long‐term experiment of cropping systems (crop‐pasture rotations under conventional tillage [CT] and no‐tillage [NT]). Bulk‐soil SOC and POC contents and AN showed the effect of cropping systems, especially the effect of crop‐pasture rotation and at 0–5 cm depth. However, NT did not lead to SOC sequestration except at 0–5 cm depth. In turn, pastures in the rotation and NT improved AS. Bulk‐soil AN explained 75, 41, and 71% of AS at 0–5, 5–20, and 0–20 cm depths, respectively, and provides an indication of AS status. Instead, AN in MA did not explain bulk‐soil AS changes as much as bulk‐soil AN, except at 0–5 cm depth. Therefore, it is not worth determining AN in MA. However, routine bulk‐soil AN determination at 0–20 cm depth by producers to diagnose nitrogen soil fertility would also provide an additional valuable indication of AS status.

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Section: Resultsmentioning

confidence: 99%

Nitrogen mineralized in anaerobiosis as indicator of soil aggregate stability

et al. 2020

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“…We hypothesize that the cropping period was too short to provide a significant change in soil physical properties improved during the pasture period. Negative effects on soil physical properties may occur depending on the cropping phase length [36]. Therefore, the rotation period in C1-L3 was the most suitable for reducing runoff and soil loss compared with the rotation period in the other crop-livestock and crop-livestock-forestry treatments.…”

Section: Discussionmentioning

confidence: 99%

Effects of Long-Term Crop-Livestock-Forestry Systems on Soil Erosion and Water Infiltration in a Brazilian Cerrado Site

et al. 2019

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Integrating agricultural land uses is a suitable alternative for fostering economic development and improving food security. However, the effects of long-term integrated systems on soil erosion and water infiltration are still poorly understood. Here, we investigate the influence of different agricultural land uses on soil erosion and water infiltration in an Oxisol site located in the Brazilian Cerrado region. The experimental area consisted of continuous grazing under variable stocking rates with regular fertilization (CG-RF), continuous cropping under no-till (CC-NT) and no-till with 4-year subsoiling (CC-SS), rotation of one year cropping and three years livestock in the livestock phase (C1-L3), rotation of four years cropping and four years livestock in the cropping phase (CL-4C) and in the livestock phase (CL-4L), and integrated crop-livestock-forestry in the cropping phase (CLF-C) and in the livestock phase (CLF-L). To evaluate water infiltration and soil loss, we used a rainfall simulator with a constant rainfall intensity of 74.9 ± 3.6 mm h−1 in plots of 0.7 m2. We carried out 72 rainfall simulations comprising four repetitions in each treatment under vegetation and bare soil. Stable infiltration rate (SIR) ranged from 45.9 to 74.8 mm h−1 and 19.4 to 70.8 mm h−1 under vegetation covers and bare soil, respectively. Our findings indicated that SIR values under CLF-C were 60% greater than under CG-RF. We also found that soil loss rates under CLF-C were 50% smaller than under CG-RF. The crop–livestock rotation period that presented better results of SIR and soil loss was one year of cropping and three years of livestock (C1-L3). Overall, we noted that SIR and soil loss values under CLF-C are similar to the Cerrado native vegetation. Therefore, our study reveals the opportunity to increase agricultural production, improve food supply, and reduce soil erosion with adequate soil and agricultural management.

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“…Diverse ICLS contributions to productivity, resource use efficiency, stability and sustainability have been demonstrated in some regional studies [12,[39][40][41][42] . Cultivated pastures in rotation with crops complement the lower productivity and quality of native pastures, reduce the need for pesticides, increase biodiversity, fix biological nitrogen, improve soil quality, sequester soil carbon and control soil erosion, determining higher crop productivity [14,39,[43][44][45] . For example, shifting crop-pasture rotations to no-till continuous annual cropping reduced soil quality and wheat yield in Uruguay [14] .…”

Section: Figmentioning

confidence: 99%

“…The initial increase in cropping area in Uruguay (mainly driven by the economic benefit of soybean production between 2003 and 2015) was based on rotation intensification (double cropping and conversion of pastures to no-till cropping in integrated crop-livestock systems; ICLS) and expansion into new areas [11] . However, the drop in international grain prices, in addition to soil degradation in poorly designed rotation systems [12][13][14][15] and soil use and management regulations [16] , stabilized the cropping area and favored ICLS expansion over the last five years. For example, the area under soybean cultivation decreased by 30% between 2013/2014 and 2019/2020 while the area of cultivated pastures increased [9] .…”

Section: Introduction: the Current Intensification Pathwaymentioning

confidence: 99%