Parâmetros Produtivos Do Milho Sob Déficit Hídrico Em Diferentes Fases Fenológicas No Semiárido Brasileiro

Silva, Samuel; Sousa, Amanda Cibele da Paz; Silva, Carla Sabrina da; Araújo, Edmaíris Rodrigues; Soares, Marcelo Augusto da Silva; Teodoro, Iêdo

doi:10.15809/irriga.2021v1n1p30-41

Cited by 5 publications

(6 citation statements)

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“…The PR after the maize harvesting in the 2021/22 crop season (Figure 4A) showed NT with values over 2 MPa at the 0.10-0.20 m soil layer, which agrees with the data found in [40,41]. At the same soil layer, [42] reported similar values as those obtained in this study regarding the chiseled area. Also, [43] observed similar values in the 0.35-0.40 m soil layer in the chiseled area, reinforcing the data obtained in this study.…”

Section: Discussionsupporting

confidence: 89%

“…The mean maize yield in the 2021/22 crop season (Table 3), agreed with the results in [42], which had similar grain yield to reported in this study when maize was subjected to water deficit from R1 onwards. However, [52] found the 1.5 Mg ha -1 grain yield in succession of oats with water shortage at the beginning of the reproductive phase, agreeing to our study results (Table 3).…”

Section: Discussionsupporting

confidence: 89%

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Maize Yield and Soil Penetration Resistance in Different Soil Tillage and Cover Crop Systems

Pletsch,

Conceição,

Haskel

et al. 2024

Braz. arch. biol. technol.

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No-tillage (NT) is a conservation practice adopted by 60% of the Brazilian farmers. Due to unsuitable management, compaction problem reported in soils under NT has increased. The study aimed to evaluate the influence of different soil tillage and different winter cover crops in long-term on crops biomass and maize yield and on soil penetration resistance (PR), in two crop seasons. The long-term experiment is located at the UTFPR Dois Vizinhos experimental station, with a combination of five soil tillage: NT; NT chiseled up to 0.35 m deep (Jumbo), annually (NTCa) and triennially (NTCt); NT with minimum tillage chiseled up to 0.35 m deep (Terrus), annually (NTMTa) and triennially (NTMTt); and four winter cover crops: black oats, common vetch, forage radish, and a mixture of oats + vetch + radish (mix). Dry matter production of cover crops was higher in oats and the mix, and in NTMTa in both years (2021 and 2022). Soil chiseling reduces PR, however over time, an increase was observed. NT showed higher PR, especially in the 0.15-0.20 m soil layer, but it did not impact crop production. Maize yield was not influenced by cover crops or soil tillage. NT proved to be the most efficient soil management, as its performance in maize yield was similar to the others, indicating the way forward in the pursuit of a more sustainable agriculture.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 89%

Maize Yield and Soil Penetration Resistance in Different Soil Tillage and Cover Crop Systems

Pletsch,

Conceição,

Haskel

et al. 2024

Braz. arch. biol. technol.

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“…Considering the greater water availability during the first planting seasons in each year of experimental conduction (2016/1 and 2017/1), values for leaf area stood out in these periods, which were on average 16.5% and 34.5% higher than in 2016/2 and 2017/2, respectively (Figure 2G), where there is less water restriction due to the early sowing of second-crop corn in central Brazil [43], which favors the vegetative development of the crop and, consequently, the foliar growth of the plants.…”

Section: Discussionmentioning

confidence: 99%

Biostimulants in Corn Cultivation as a Means to Alleviate the Impacts of Irregular Water Regimes Induced by Climate Change

Piati

Lima

Sobrinho

et al. 2023

Plants

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Climate change alters regular weather seasonality. Corn is one of the main crops affected by irregular water regimes. Due to complications in decision-making processes related to climate change, it is estimated that planting corn outside the optimal window results in around USD 340 million in losses per year in the United States’ Corn Belt. In turn, exogenous plant growth regulators have been gaining prominence due to their potential to positively influence the morphology and physiology of plants under stress. This study was based on the hypothesis that the use of plant growth regulators can assist in mitigating the adverse effects of climate change on corn plants sown both inside and outside the recommended planting period. In this context, the effects of biostimulant application on gas exchange in corn plants sown within and outside the recommended period were evaluated. The experiment was carried out in randomized blocks in a 4 × 5 × 2 factorial scheme with four repetitions. These were four sowing times, the application of the biostimulants via seeds in five doses, and foliar applications (presence and absence). The biostimulant doses were 0.00, 6.25, 12.50, 18.75, and 25 mL kg−1. The foliar application used a dose of 500 mL ha−1. Only in the period (2017/2) higher doses of biostimulants indicated a decrease in the water use efficiency of plants, suggesting the need to evaluate this variable carefully. In this regard, future studies may investigate the ideal doses and application timings of biostimulants for different edaphoclimatic conditions. In general, the combined use of biostimulants on seeds and as a foliar treatment boosted physiological activity and stimulated photosynthetic processes in corn plants. Based on these data, plant regulators can be a useful tool to mitigate the adverse effects of climate change on corn plants sown inside and outside the planting period.

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“…Time of planting also influenced maize productivity as shown by the lower yield obtained in the 2016/2017 cycle in which the crop was planted later than usual at the beginning of March rather than in mid‐to‐late February. Maize is sensitive to water deficit from the corn tasselling stage with reduced productivity (Silva et al, 2021). In the present study, flowering occurred in the dry season whilst water deficit in the area started in May (2016/2017), April (2017/2018) and May (2018/2019).…”

Section: Discussionmentioning

confidence: 99%

“…Time of planting also influenced maize productivity as shown by the lower yield obtained in the 2016/2017 cycle in which the crop was planted later than usual at the beginning of March rather than in mid-to-late February. Maize is sensitive to water deficit from the corn tasselling stage with reduced productivity (Silva et al, 2021). In Substantial restoration of the canopy cover was detected within 3 years of systematic or selective thinning since the newly opened spaces favoured the growth of trees (Monte et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Transmission of photosynthetically active radiation and the productivities of soybean and maize in agroforestry systems

Aragão

Zolin

Behling

et al. 2023

J Agronomy Crop Science

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In integrated crop‐livestock‐forestry (ICLF) systems, an agroforestry model, the forestry component influences the distribution of photosynthetically active radiation (PAR) and alters grain productivity. The aim of this study was to evaluate the effects of systematic and selective thinning of eucalyptus stands on the productivity of soybean and maize grown. The randomized block‐designed experiment comprised three treatments, namely crops grown under full sunlight (CFS) and in ICLF plots subjected to systematic and selective thinning to leave single‐row (ICLFS) and triple‐row (ICLFT) tree configurations. Soybean and maize were planted in succession between the tree stands and PAR incidence/transmittance and crop productivities were evaluated in the north and south sun‐exposed faces of the plots during three cultivation cycles after thinning. In comparison with CFS, PAR transmittance in the ICLF systems decrease varied according to the time of day, period of the year, distance of the sampling position from the trees, the sun‐exposed area (north and south faces) and time after thinning. Soybean productivities in ICLFS were similar to those of CFS in the first and second crop cycles, but significantly lower (p < 0.05) in the third crop cycle. In the ICLFT system, soybean productivity was similar to that of CFS in the second crop cycle but significantly lower in the first and third crop cycles. With regard to the maize crop, productivities decreased in the order CSF > ICLFS > ICLFT in all cultivation cycles. Our results showed that PAR transmittance and soybean/maize productivities were positively influenced by thinning of eucalyptus stands, particularly in ICLFS system.

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Parâmetros Produtivos Do Milho Sob Déficit Hídrico Em Diferentes Fases Fenológicas No Semiárido Brasileiro

Cited by 5 publications

References 0 publications

Maize Yield and Soil Penetration Resistance in Different Soil Tillage and Cover Crop Systems

Maize Yield and Soil Penetration Resistance in Different Soil Tillage and Cover Crop Systems

Biostimulants in Corn Cultivation as a Means to Alleviate the Impacts of Irregular Water Regimes Induced by Climate Change

Transmission of photosynthetically active radiation and the productivities of soybean and maize in agroforestry systems

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