Suppressive effects on weeds and dry matter yields of cover crops

Ferreira, A. C. de B.; Borin, A. L. D. C.; Bogiani, Júlio César; Lamas, F. M.

doi:10.1590/s0100-204x2018000500005

Cited by 8 publications

(10 citation statements)

References 21 publications

(27 reference statements)

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“…High dry matter values of a cover species are related to the good formation of straw on the soil, which guarantees a reduction in the establishment of weeds, by means of factors such as the thermal amplitude, little light availability and formation of physical barrier (Monquero et al, 2009;Ferreira et al, 2018).…”

Section: /9mentioning

confidence: 99%

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Gama

Leite

Pinheiro

et al. 2020

Agraria

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Weeds can occur in cultivated areas, competing with crops and causing considerable losses. Herbicides are the basis of weed control; however, they are questionable due to their possible negative impacts on human health and the environment. An alternative for controlling weeds is using cover plants. This study aimed to determine the floristic composition of weeds in an Amazonian agrosystem with cover plants and to evaluate the production of biomass, the soil cover rate and the weed suppression potential of cover plants. The experimental design was in randomized blocks, in a 4 x 2 factorial scheme. The factors under study were the cover species (Brachiaria ruziziensis, Canavalia ensiformis, Mucuna deeringiana) and the control group that consisted of weeds, evaluated during two agricultural years (2017 and 2018), with four replicates. Digitaria horizontalis was the most important weed species and was completely suppressed by B. ruziziensis. This cover type had a large production of biomass, greater coverage of the soil and high suppression of weeds in the Amazonian agrosystem.

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Section: /9mentioning

confidence: 99%

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Gama

Leite

Pinheiro

et al. 2020

Agraria

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“…Congo grass produced 5,620 kg ha -1 of dry matter as a sole crop and from 4,643 kg ha -1 to 4,947 kg ha -1 when intercropped with sorghum, which are considered high dry mass production levels (Ferreira et al, 2018;Hirata et al, 2018). Urochloa forage species tend to produce large amounts of dry matter in off-season crops in the Cerrado region (Carvalho et al, 2017).…”

Section: Dry Mass Production For Sorghum and Grassesmentioning

confidence: 99%

Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Filho¹,

Marchão

Carmona

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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Sorghum (Sorghum bicolor (L.) Moench) may be harmlessly intercropped with Urochloa species during the off-season in the Brazilian Cerrado. At the end of the sorghum cycle, forages can be used for straw production for soybean (Glycine max L.) as the summer crop. This study aimed to evaluate sorghum cultivated during the off-season, intercropped with palisade grass (Urochloa brizantha cv. 'Marandu' (Hochst. ex A. Rich). R. D. Webster) and Congo grass (Urochloa ruziziensis (R. Germ. and Evrard) Crins) in two row spacings (0.5 and 0.7 m) for their effect on plant growth, dry mass production, sorghum yield and soybean grain yield.The experiment was a randomized block design: a 3 × 2 factorial scheme, with three levels of intercropping (palisade grass, Congo grass or sole cropping) and two levels of row spacing (0.5 or 0.7 m) with four replicates. Several physiological growth indexes were estimated from 10 to 60 days after emergence (DAE), including dry matter production and sorghum agronomic performance. Sorghum accumulated 0.22 g of dry matter d -1 at 10 to 60 DAE, and was not affected by intercropping. The dry mass gain of forages (0.04 g d -1 on average) was not affected by sorghum either. Higher sorghum grain yield (2,922 kg ha -1 ) was observed under the 0.5-m row spacing when compared to the 0.7-m spacing. The results indicate that palisade or Congo grass may be used as companion crops for sorghum with no grain yield loss, be it to improve soybean grain yield, soil cover or integrated crop systems, aiming at sustainable intensification.

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“…An important differential in the NTS was the inclusion of ruzigrass intercropped with maize and as subsequent crop to soybean, acting as a cover plant and improving K cycling in the system. According to Ferreira et al (2018), the use of Poaceae species as cover crops (including ruzigrass) after the soybean harvest increases biomass production, providing soil protection and straw for subsequent cotton cultivation under no-till in the Cerrado region. Oliveira et al (2019) reported that maize intercropped with Urochloa brizantha produces a high amount of plant residues, in addition to nutrient cycling, including K. The same authors reported that plant biomass of U. brizantha or ruzigrass accumulated K similarly to or more than maize.…”

Section: Partial Potassium Balance and Exchangeable Potassium Pool In The Soil Profilementioning

confidence: 99%

Exchangeable potassium reserve in a Brazilian savanna Oxisol after nine years under different cotton production systems

Ferreira

Borin

Lamas

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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Adequate potassium (K) fertilization is essential for agricultural production in soils of the Brazilian Savanna (Cerrado biome) due to the high demand by crops (especially cotton), likelihood of leaching losses, and the dependence on fertilizer importations. Therefore, sustainability requires improvements in the soil efficiency management. This study evaluated the influence of soil management and crop succession or rotation combinations with cotton on K dynamics and exchangeable reserves in the soil profile, and the partial balance of K after nine years of cultivation in a clayey Oxisol in the Cerrado. The soil was sampled in layers up to 100 cm depth in four cotton production systems treatments: 1) conventional soil tillage (CST) with cotton monoculture; 2) CST with annual cotton-soybean-cotton succession; 3) CST with cotton/soybean/maize rotation; and 4) no-tillage system (NTS) with cotton/soybean/ maize rotation and Urochloa ruziziensis (ruzigrass) as a cover crop in the off-season after grain crops. The experiment was conducted using a randomized block design with four replications.CST with cotton monoculture favored the leaching of K surplus from fertilization. Crop rotation including ruzigrass in the NTS allowed better control of K dynamics, ensuring its circulation in the soil-plant compartments and reducing leaching. The increased organic matter (OM) in this system enlarges the storage capacity of K in the topsoil. The adoption of no-tillage crop systems integrating ruzigrass is viable to improve the efficiency of K fertilizers in cotton cultivation in highly weathered tropical soils.

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Suppressive effects on weeds and dry matter yields of cover crops

Cited by 8 publications

References 21 publications

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Phytosociology and cover analysis in the suppression of weeds from an Amazonian agrosystem

Intercropping sorghum and grasses during off-season in Brazilian Cerrado

Exchangeable potassium reserve in a Brazilian savanna Oxisol after nine years under different cotton production systems

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