Weathering deterioration in pre-harvest of soybean seeds: physiological, physical, and morpho-anatomical changes

Pinheiro, Daniel Teixeira; Dias, Denise Cunha Fernandes dos Santos; Medeiros, André Dantas de; Ribeiro, João Paulo Oliveira; Silva, Felipe Lopes da; Silva, Laércio Junio da

doi:10.1590/1678-992x-2020-0166

Cited by 14 publications

(14 citation statements)

References 26 publications

(32 reference statements)

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“…These results show the large increase in N input in the production system for the subsequent off-season corn crop when the soybean crop cannot be harvested due to excessive rainfall at harvest. The exposure of soybean crops to prolonged periods of rainfall during preharvest makes mechanized harvest technically and economically unfeasible due to the low physical and sanitary quality of the seeds caused by deterioration and fermentation of soybean grains [ 8 , 10 ]. Therefore, in years subject to extreme weather conditions, unharvested soybean residues deposited on the soil surface can result in a surplus of up to 180 kg ha –1 of N for the subsequent crop.…”

Section: Resultsmentioning

confidence: 99%

“…Excessive rainfall in the soybean preharvest period leads to significant crop yield losses by causing direct damage to the qualitative, quantitative, and sanitary aspects of soybean seeds [ 5 , 8 , 9 ]. In extreme situations, the exposure of soybean plants to prolonged periods of rainfall and high moisture content of grains makes mechanized harvest technically and economically unfeasible due to the low physical and sanitary quality of the seeds caused by deterioration and fermentation of soybean grains [ 8 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

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Understanding the contribution of soybean crop residues inoculated with Bradyrhizobium spp. and not harvested on nitrogen supply in off-season corn cultivars

et al. 2022

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Excessive rainfall in the soybean preharvest period can make mechanized crop harvesting technically and economically unfeasible, causing 100% losses in soybean grain yield. An alternative to reduce the economic losses of farmers would be using unharvested soybean crop residues as a source of nitrogen (N) for the subsequent corn crop. However, a question that still needs to be understood is whether the amount of N released from unharvested soybean residues (straw and grains) is sufficient to meet all the nutritional demand for this nutrient in the off-season corn. Therefore, this study investigated the impact of unharvested soybean crop residue persistence on the yield response of off-season corn crop (Zea mays L.) to the application of N fertilizer rates when grown in tropical Cerrado soils of medium and high fertility. Four simple corn hybrids (SYN7G17 TL, 30F53VYHR, B2433PWU, and AG 8700 PRO3) were grown in soils of medium fertility and medium acidity level (UFMS 1) and high fertility and low acidity level (UFMS 2) and fertilized with five of N fertilizer rates (0, 40, 80, 120, and 160 kg ha–1 of N) applied at 30 days after emergence (DAE). Canonical correlation analysis (CCA) was used to investigate the interrelationships between the groups of independent (agricultural production areas, corn cultivars, and N application rates) and dependent (corn agronomic traits) variables. Crop residues remaining on the soil surface from soybeans not harvested and inoculated with Bradyrhizobium spp. can supply most of the nitrogen requirement of off-season corn grown in succession, especially in tropical soils of medium fertility. However, in high-fertility tropical soils, the maximum grain yield potential of off-season corn cultivars can be obtained with the application of mineral N fertilizer in supplement the amount of nitrogen released from unharvested soybean residues. Therefore, the N requirement depends on the corn cultivar and the agricultural production area. However, our results show that when off-season corn is grown on unharvested soybean residues, nitrogen fertilization in topdressing can be dispensed. The agricultural area with high fertility soil (UFMS 2) enhances the grain yield of the off-season corn crop. The corn cultivar AG 8700 PRO3 has a higher thousand-grain mass and high grain yield potential under Brazilian Cerrado conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Understanding the contribution of soybean crop residues inoculated with Bradyrhizobium spp. and not harvested on nitrogen supply in off-season corn cultivars

et al. 2022

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“…In the case of soybean, which is highly sensitive to environmental conditions, the phase in which the seed is maintained in the field is critical and promotes the most frequent and significant losses in quality. Among the climatic factors, especially in preharvest, excess water is detrimental to the soybean seed quality, for causing weathering deterioration (Giurizatto et al, 2003;França-Neto et al, 2016;Pinheiro et al, 2021). This damage consists of wrinkling and cracks in the seed coat, due to seed coat expansion and contraction when exposed to alternating cycles of relative humidity, especially associated with high temperatures (Forti et al, 2013;França-Neto et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Water uptake of soybean pods and seeds with different lignin contents

Brzezinski¹,

Abati

Zucareli

et al. 2022

Rev. Ceres

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The identification of pod-and seed-related traits of soybean genotypes and their interaction with water uptake can be applied in breeding programs with a view to establishing cultivars developed for the production and maintenance of high-quality seeds. The objective was to evaluate the water uptake of pods and seeds of soybean cultivars with different lignin contents after different soaking periods. The experimental was arranged in a completely randomized, 7×10 factorial design, with four replications. The factors consisted of seven soybean cultivars and 10 soaking periods (1, 2, 3, 4, 5, 6, 7, 8, 24, 48 hours). The pods and seeds were grown in a greenhouse and harvested at the phenological growth stage R8 (at full maturation, when 95% of the pods had mature color). The following traits were evaluated: lignin content in pod and seed coat, moisture content, and rate of water uptake of pods and seeds. Soybean cultivars with pods with high lignin contents have a lower rate of water uptake. The lignin contents of the seed coats, within the chosen limits, did not affect the seed water uptake.

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“…The presence of weathering damage makes it difficult to produce quality seeds (Shu et al, 2020;Pinheiro et al, 2021), as the physical, sanitary, and physiological attributes of soybean seeds are susceptible to this type of damage. In this sense, Forti et al (2013) observed a reduction in the physiological potential of soybean seeds associated with weathering deterioration.…”

Section: Introductionmentioning

confidence: 99%

Quality and chemical composition of soybean seeds with different lignin contents in the pod and seed coat subjected to weathering deterioration in pre-harvest

et al. 2022

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Soybean seeds may show different responses to weathering deterioration depending on the intrinsic characteristics of the genetic material and the intensity and duration of the rainfall period. This study aimed to evaluate the effect of pre-harvest weathering deterioration on the quality and chemical composition of soybean seeds with different lignin contents in the pod and seed coat. The percentage of weathering damage was evaluated by the tetrazolium test, X-ray test, lignin content in the pod and seed coat, germination, accelerated aging, seedling emergence, seed health test, and oil, protein, and chlorophyll contents. The experimental design was completely randomized in a 7×3 factorial scheme, that is, seven cultivars and three rainfall volumes (0, 54, and 162 mm), simulated when 95% of the pods had a mature color. The physiological and sanitary quality of soybean seeds reduces with an increase in pre-harvest rainfall. Soybean seeds from cultivars with higher lignin contents in the pod present a higher tolerance to pre-harvest weathering deterioration and provide seeds of better physiological quality. Seed oil and protein content is reduced in some cultivars as rainfall increases. Plants with higher lignin contents in the pods produce seeds with a lower incidence of the fungus Cercospora kikuchii and lower chlorophyll content when associated with pre-harvest rainfall.

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Weathering deterioration in pre-harvest of soybean seeds: physiological, physical, and morpho-anatomical changes

Cited by 14 publications

References 26 publications

Understanding the contribution of soybean crop residues inoculated with Bradyrhizobium spp. and not harvested on nitrogen supply in off-season corn cultivars

Understanding the contribution of soybean crop residues inoculated with Bradyrhizobium spp. and not harvested on nitrogen supply in off-season corn cultivars

Water uptake of soybean pods and seeds with different lignin contents

Quality and chemical composition of soybean seeds with different lignin contents in the pod and seed coat subjected to weathering deterioration in pre-harvest

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