Gas Exchanges and Agricultural Performance of Cover Plants in Compacted Soil After Soybean Cultivation

The present study sought to evaluate gas exchange and biomass production in cover crops grown in soils with different levels of compaction, after soybean cultivation. Experimental design was completely randomized in 4 × 4 factorial scheme, with the factors being composed of four levels of soil densi...

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Bibliographic Details
Published in:Communications in Soil Science and Plant Analysis 2023-10, Vol.54 (18), p.2508-2518
Main Authors: da Silva, Jodean Alves, de Carvalho, Luiz Gonsaga, Andrade, Fabrício Ribeiro
Format: Article
Language:English
Subjects:
Agricultural practices
Biomass
Compacted soils
Compaction
Cover crops
Crop production
Crops
Crotalaria
Cultivation
Design of experiments
Experimental design
Gas exchange
Photosynthesis
Plant species
Planting density
Plants (botany)
Root development
roots
Soil
Soil compaction
Soil density
Soybeans
Transpiration
Urochloa brizantha
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Summary:The present study sought to evaluate gas exchange and biomass production in cover crops grown in soils with different levels of compaction, after soybean cultivation. Experimental design was completely randomized in 4 × 4 factorial scheme, with the factors being composed of four levels of soil density (1.0 ± 0.013; 1.15 ± 0.022; 1.30 ± 0.035 and 1.45 ± 0.040 Mg.m −3 ) and four cover crops (Avena strigosa Schreb.; Crotalaria juncea L.; Urochloa brizantha cv. Piatã and Crotalaria spectabilis Roth), with three repetitions. Net photosynthesis rate and the transpiration of cover plants were not influenced by soil compaction, unlike the SPAD index of U. brizantha, which improved performance in the photosynthetic process with increasing soil density. All cover plant species show a reduction in shoot dry biomass starting at a density of 1.00 Mg.m −3 , as well as the dry biomass and root volume in the compacted layer and below the compacted layer for A. strigosa Schreb and U. brizantha and, with lower root volumes for C. juncea L. and C. spectabilis Roth in the layer below the compacted. U. brizantha showed the best root development in density of 1.45 Mg.m −3 , and a greater number of roots per shoot dry biomass, being good alternatives for the preventive management of compaction in compacted soils. Root growth was higher above and below the compacted layer.
ISSN:0010-3624
1532-2416
1532-4133
DOI:10.1080/00103624.2023.2227209