Sistemas de preparo do solo e de semeadura no rendimento de grãos de soja em área de várzea

Sartori, Gerson Meneghetti Sarzi; Marchesan, Enio; David, Ricardo de; Donato, Gabriel; Coelho, Lísias; Aires, Núbia Pentiado; Aramburu, Bruno Behenck

doi:10.1590/0103-8478cr20150676

Cited by 20 publications

(21 citation statements)

References 12 publications

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“…The 2014/2015 soybean crop covered approximately 300,000ha (IRGA, 2016). The Central Depression of the State of RS has mainly Haplic Planosol soil, which is hydromorphic due to a reduced infiltration capacity and high compaction rates (SARTORI et al, 2016). It has frequent water surplus periods when rainfall occurs (LINKEMER et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Risk of water surplus in soybean crop on haplic planosol soil in the Central Depression of Rio Grande do Sul State, Brazil

et al. 2017

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The aim of this study was to identify soybean sowing dates on which there was low water surplus risk. The crop was raised on a Haplic Planosol soil in the Central Depression of Rio Grande do Sul, Brazil. Soybean development simulations and daily water balances were calculated for different sowing dates from August 1968 to July 2012. Water surplus data was subjected to BoxPlot analyses and Scott-Knott tests at a 5% error probability. Exponential, gamma, lognormal, normal and Weibull functions were tested and the best fits to the data were obtained for both subperiods and total cycle. The highest number of fits for the development cycle and subperiods were obtained using the gamma and weibull functions, respectively. For sowing carried out after November 1, there was a low water surplus risk in the sowing-emergence subperiod. The risk of water surplus during the development cycle decreased with the advance of the sowing date.

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Section: Introductionmentioning

confidence: 99%

Risk of water surplus in soybean crop on haplic planosol soil in the Central Depression of Rio Grande do Sul State, Brazil

et al. 2017

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“…In Cachoeirinha, the root-blocking layer is around 13 cm depth, which is typical of paddy rice fields (Sartori et al, 2015(Sartori et al, , 2016. In Santa Maria, most of the root system was located up to 30 cm depth.…”

Section: Resultsmentioning

confidence: 98%

“…Conventional tillage with successive plowing and harrowing causes these lowland soils to show great physical limitations, such as aggregate disintegration and reduced macroporosity (Sartori et al, 2016). Therefore, when growing soybean in these areas, water excess and deficit may be more frequent than in nonhydromorphic soils (Thomas & Lange, 2014;Sartori et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, when growing soybean in these areas, water excess and deficit may be more frequent than in nonhydromorphic soils (Thomas & Lange, 2014;Sartori et al, 2016). These water stress periods can result in metabolic changes that directly affect the plant energy balance, and cause a reduction of potential crop productivity (Cornelious et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…If, on the one hand, rotating soybean crops with irrigated rice have increased recently, on the other hand, there are few studies on the development and productivity of the used soybean cultivars in hydromorphic soils in Brazil (Zanon et al, 2015(Zanon et al, , 2016Sartori et al, 2016), Uruguay (Chebataroff et al, 2002;Castillo et al, 2013), and Argentina (Caride et al, 2011). These few studies do not completely explain the differences of the ecophysiological processes (photosynthetic rate, dry matter partition), and the development of soybean cultivated in hydromorphic and nonhydromorphic soils in an integrated way.…”

Section: Introductionmentioning

confidence: 99%

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Performance of soybean in hydromorphic and nonhydromorphic soil under irrigated or rainfed conditions

Rocha

Streck

Zanon

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate soybean cultivation in a hydromorphic or nonhydromorphic soil, with or without supplemental irrigation. Field experiments were carried out with the TECIRGA 6070RR and A 6411RG cultivars in highlands (nonhydromorphic soils) and lowlands (hydromorphic soils), which are traditionally cultivated with irrigated rice. The following parameters were determined in both soybean cultivars: leaf area index, developmental stages, dry matter partition, and leaf gas exchange. Low water stresses, which commonly occur either by deficit or excess in soybean areas cultivated in hydromorphic soils, do not affect the development and partitioning of dry matter; however, they cause reductions in stomatal conductance, photosynthetic rate, and leaf area evolution. Growing soybean in lowlands exposes plants to water stress, even in years with well-distributed rainfall during the growing season, due to the low water storage capacity of these soils.Index terms: Glycine max, gas exchange, irrigation, lowlands. Desempenho da soja cultivada em solo hidromórfico e não hidromórfico com ou sem irrigaçãoResumo -O objetivo deste trabalho foi avaliar o cultivo de soja em solo hidromórfico ou não hidromórfico, com ou sem irrigação suplementar. Experimentos em campo com as cultivares TECIRGA 6070RR e A 6411RG foram realizados em terras altas (solos não hidromórficos) e em terras baixas (solos hidromórficos), que são tradicionalmente cultivadas com arroz irrigado. Determinaram-se, nas duas cultivares de soja, os seguintes parâmetros: índice de área foliar, estágios de desenvolvimento, partição de matéria seca e quantificação das trocas gasosas em nível foliar. Pequenos estresses hídricos, que comumente ocorrem por deficit ou excesso em áreas de soja cultivada em solo hidromórfico, não influenciam o desenvolvimento e a partição de matéria seca; porém, provocam reduções da condutância estomática, da taxa fotossintética e da evolução da área foliar. O cultivo de soja em solos hidromórficos faz com que as plantas sejam expostas ao estresse hídrico, até mesmo em anos com precipitação de chuvas bem distribuída ao longo da estação de crescimento, em razão da baixa capacidade de armazenamento de água desses solos.Termos para indexação: Glycine max, trocas gasosas, irrigação, terras baixas.

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Biophysical and management factors causing yield gap in soybean in the subtropics of Brazil

et al. 2021

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Little is known about the relationships between soybean [Glycine max (L.) Merr.] maturity grouping and the yield-limiting factors in the subtropics. This information can be used to estimate soybean potential yield (Yp) and the water-limited yield (Yw) and to optimize current soybean management practices to improve yield and resource use efficiency. The objectives were (a) to estimate the Yp, Yw, and yield gaps (YGs) of soybean in subtropical Brazil and (b) to identify the biophysical and management factors which potentially explain the YG. The CSM CROPGRO model that was calibrated with data collected between 2011 and 2019 was used to estimate the influence of sowing date and maturity group (MG) on yield potentials and water efficiencies. Yield varied from 6.1 to 7.2 Mg ha −1 and from 2.5 to 5.1 Mg ha −1 between buffer zones (BZs) for Yp and Yw, respectively. The YG caused by water deficit (YGw) ranged from 26% (1.8 Mg ha −1 ) to 62% (4.1 Mg ha −1 ) of the Yp and the YG caused by management (e.g., sowing date, MG, final density) ranged from 9% (0.6 Mg ha −1 ) to 39% (2.7 Mg ha −1 ) of the Yp. The main management factor of the YG was sowing date. The potential yield was higher in the early MGs, showing greater water use efficiency in MG ≤ 5.5 (9.6 kg ha −1 mm −1 ) than in high MGs (MG ≥ 5.6). Findings from this study can be used by agronomists in subtropical regions to optimize soybean yields.

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Sistemas de preparo do solo e de semeadura no rendimento de grãos de soja em área de várzea

Cited by 20 publications

References 12 publications

Risk of water surplus in soybean crop on haplic planosol soil in the Central Depression of Rio Grande do Sul State, Brazil

Risk of water surplus in soybean crop on haplic planosol soil in the Central Depression of Rio Grande do Sul State, Brazil

Performance of soybean in hydromorphic and nonhydromorphic soil under irrigated or rainfed conditions

Biophysical and management factors causing yield gap in soybean in the subtropics of Brazil

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