Winter wheat cover crop increased subsoil organic carbon in a long-term cotton cropping system in Tennessee

Forty‐two years of no‐tillage and cover cropping improved soil oxygen availability and resilience

“…Similarly, the NT treatments showed 104% and 222% higher infiltration and transmissivity, respectively, than the CT treatments. Interestingly, CC exhibited a more pronounced effect than NT in our study in maintaining soil oxygen availability (Table 1), possibly due to the greater influence of CC in improving profile‐scale soil organic carbon compared to NT, which mainly enhanced soil organic carbon in the thin topsoil layer (Patra et al., 2022). Residue input from CC is especially important for soil health in low‐residue crops like cotton in the warm and humid southern United States, favoring soil organic carbon decomposition (Franzluebbers, 2010; Mullen et al., 1998).…”

“…Cover cropping significantly influenced soil oxygen dynamics, with approximately 4× shorter period when soil oxygen dropped <10% during the growing season and consistently maintained higher average soil oxygen availability compared to NC treatments ( Martínez et al, 2008) was reported to increase water infiltration and transmission (Franzluebbers, 2002;Nouri et al, 2019) due to higher surface soil organic carbon accumulation under these practices (Blanco-Canqui et al, 2011;Patra et al, 2022). In a previous study at this experimental site, Nouri et al ( 2019) reported 96% and 157% higher cumulative infiltration and transmissivity, respectively, in plots with HV compared to NC plots.…”

“…Better soil air–water balance to sustain an oxygenated soil environment under cover cropping and NT is connected to improved soil physical properties impacting water infiltration and transmissions (Blanco‐Canqui et al., 2011; Horn & Smucker, 2005; Nouri et al., 2019). Greater aggregate stability under NT and HV (Laudicina et al., 2017; Martínez et al., 2008) was reported to increase water infiltration and transmission (Franzluebbers, 2002; Nouri et al., 2019) due to higher surface soil organic carbon accumulation under these practices (Blanco‐Canqui et al., 2011; Patra et al., 2022). In a previous study at this experimental site, Nouri et al.…”

Diversificação de sistemas de produção com forrageiras na região de expansão agrícola do Brasil: impactos no carbono, na saúde do solo e na produtividade de culturas

“…Comparando com as forrageiras utilizadas nos sistemas de cultivos presentes neste estudo, a BMd e o CMb (até 30 cm) e CMs (até 100 cm) contribuíram para um aumento no estoque de carbono aliado com a produção de soja, mostrando que apesar do manejo intensivo de produção de grãos, o uso dessas forrageiras no sistema potencializam o sequestro de carbono, assim como, em áreas não exploradas economicamente (PNom), uma vez que independente do componente animal, o uso dessas forrageiras tropicais melhora a atividade microbiana do solo, ajudam na ciclagem de nutrientes e repõem a matéria orgânica (Lemaire et al, 2014). Além de que, a alocação e acúmulo de matéria orgânica pode estender à camadas mais profundas do solo, em virtude das forrageiras apresentarem um sistema radicular abundante e profundo (Patra et al, 2022), além da própria migração da matéria orgânica .…”