Soybean growth and yield under cover crops

Oliveira, Priscila de; Nascente, Adriano Stephan; Kluthcouski, J.

doi:10.1590/s0034-737x2013000200014

Cited by 10 publications

(15 citation statements)

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“…BRS Piatã e U. ruziziensis, quando semeadas na densidade de 10 kg ha -1 , aos 24 dias após a emergência da soja, reduziram a produtividade desta cultura de forma distinta, com decréscimos de 3,03 e 16,23%, respectivamente (Saraiva et al, 2013). Diversos autores relatam U. brizantha e B. pilosa como plantas daninhas de grande importância para diversas culturas (Biffe et al, 2010;Pinotti et al, 2010;Camargo et al, 2011;Pereira et al, 2012), inclusive para soja (Oliveira et al, 2013).…”

Section: Introductionunclassified

Interação entre volume de vaso e competição com plantas daninhas sobre o crescimento da soja

et al. 2015

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Interação entre volume de vaso e competição com plantas daninhas sobre o crescimento da sojaA avaliação dos efeitos da competição das plantas daninhas sobre o crescimento da soja é efetuada por meio de ensaios em ambientes protegidos. Esses ensaios, geralmente, são feitos em recipientes (vasos) em que se testam os efeitos desejados em diferentes épocas de coleta. O tamanho (volume) dos vasos a ser escolhido depende do tipo de estudo, da espécie-teste e das variáveis que serão estudadas. Por esta razão, objetivou-se com este trabalho avaliar o efeito do tamanho de vasos na habilidade competitiva da soja com as plantas daninhas Urochloa brizantha e Bidens pilosa. O experimento foi conduzido em casa de vegetação e o delineamento foi em blocos ao acaso, em esquema fatorial 3 × 5, com quatro repetições. Os fatores considerados no experimento foram três sistemas de competição (soja cultivada isoladamente, soja + U. brizantha e soja + B. pilosa) e cinco volumes dos recipientes (2, 4, 7, 10 e 16 dm 3 ). O crescimento das plantas de soja foi afetado tanto pelo volume dos vasos quanto pela competição com U. brizantha e B. pilosa, sendo que U. brizantha foi mais competitiva com a soja. Vasos com maiores volumes aumentam os efeitos da competição sobre o crescimento da soja. Palavras Interaction between pot size and competition with weeds on soybean growthThe evaluation of competition effects between soybean and weed is carried out in protected environments. These assays are usually conducted in pots to study the desired effects at different sampling/harvest times. The size of the pots varies with the type of study, plant species and the variables that will be studied. Thus, the aim of this work was to evaluate the effect of the pots size on the competitive ability of soybean with the species Urochloa brizantha and Bidens pilosa. The experiment was conducted in a protected environment and was arranged in a 3 × 5 factorial randomized block design with four replications. The factors considered in the experiment were three systems of competition (soybeans grown alone, soybeans + U. brizantha and soybean + B. pilosa) and five pot sizes (2, 4, 7, 10 and 16 dm 3 ). The soybean growth was affected by the pot sizes and the competition with U. brizantha and B. pilosa. U. brizantha was more competitive with soybean than B. pilosa. Pots with larger volumetric capacity increased the effects of the competition on the soybean growth.

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Section: Introductionunclassified

Interação entre volume de vaso e competição com plantas daninhas sobre o crescimento da soja

et al. 2015

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“…These soil biological activity traits increased with soybean cropping, in comparison with corn. Lower metabolic quotient and soil enzymatic activity found in sequences with palisade grass may be related to the higher biomass and lower decay of U. brizantha mulch (Oliveira et al 2013a(Oliveira et al , 2013b, negatively correlated with general soil microbial activity. Similar results were observed in native vegetation (Ferreira et al 2010(Ferreira et al , 2011.…”

Section: Resultsmentioning

confidence: 94%

“…The amount and composition of the cover biomass affected soil quality indicators and soilborne fungi, along with cash crops yield. Millet and common bean provided higher soybean grain yield (4,772 kg ha -1 and 5,200 kg ha -1 , respectively), while the soybean yield was 3,708 kg ha -1 , when grown after palisade grass (Oliveira et al 2013a). Corn yield was higher after common bean (8,133 kg ha -1 ), differing from millet (6,601 kg ha -1 ) and palisade grass (6,801 kg ha -1 ) (Oliveira et al 2013b).…”

Section: Resultsmentioning

confidence: 98%

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Response of soil fungi and biological processes to crop residues in no-tillage system

Oliveira

Nascente

Ferreira

et al. 2016

Pesqui. Agropecu. Trop.

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Soil management and crop rotation can directly affect the soil microbial community. This study aimed at determining soil quality indicators and soilborne fungi in a no-tillage system. A randomized blocks design, in a 3 × 2 factorial arrangement, was used. Three cover crops (palisade grass, millet and common bean) provided straw and root residues to the following crops of corn and soybean. The common bean-soybean sequence provided little soil covering and higher metabolic quotient and soil basal respiration and total enzymatic activity, as well as a general increase of soilborne fungi. The principal component analysis revealed that 76.61 % of the variance can be explained by the three first components, with cover crops, soil basal respiration and metabolic quotient regarded as the main qualitative and quantitative sources of variance in the first component. Carbon from the microbial biomass was the soil quality indicator best correlated to crop yield and negatively correlated to Fusarium solani density. The Rhizoctonia solani population was correlated with higher metabolic quotient and soil total enzymatic activity and basal respiration. The palisade grass crop favored soil fungistasis and enhancement of antagonist Trichoderma spp. populations. The multivariate approach demonstrated the association of soil fungi with soil quality indicators, as well as a higher influence of cover crops on the variance observed, in comparison to cash crops.

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“…Farming activities are subjected to climate variations, the main reason for farmers not attaining the maximum yield potential of their crops (OLIVEIRA et al, 2013). According to Neumaier et al (2000), long drought periods followed by water shortage reduce the plant height, the relative growth rate, the leaf area index and the photosynthesis rate.…”

Section: Introductionmentioning

confidence: 99%

Growth and Yield of Soybean With Penergetic Application

Souza¹,

Almeida²,

Alberton

2017

RSA

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-Soybean (Glycine max L.) plants are economically important for food industry and animal feed due their nutritional qualities. Soybean crops are highly productive and responsive to new technologies, such as, Penergetic. The aim of this study was to assess the effect of Penergetic-P and Penergetic-K on soybean growth and yield. The Penergetic products were tested according to five different treatments in the field: 1-) control (without NPK and/or Penergetic); 2-) 290 kg ha -1 NPK (04-24-18) + Micro; 3-) 300 g ha -1 Penergetic-P + 290 kg ha -1 NPK (04-24-18) + Sulfate (S); 4-) 300 g ha -1 of Penergetic-K; 5-) 300 g ha -1 Penergetic-P + 300 g ha -1 Penergetic-K. The experiment was conducted in a randomized block design, with three replications for each treatment. Comparisons were performed by ANOVA and Duncan test (p ≤ 0.05). Differences among treatments for number of nodules per plant were not significant, but observed for dry weight of nodules (DWN). Application of Penergetic-K in soil increased the DWN in comparison with application of NPK and micronutrients. Shoot, root, total dry matter and shoot/root ratio did not differ among treatments as well as the chlorophyll index and nitrogen in shoots. The grain yield was lower with the addition of NPK + micronutrients and higher with the addition of Penergetic-K. Penergetic-K addition increased soybean yield, up to 20% compared to the treatment with NPK + micronutrients. We conclude that the use of Penergetic benefits the soybean production.Keywords -Bio-activator of soil, nutrients, sustainability Resumo -A soja (Glycine max L.) tem grande importância comercial, pois é extensivamente utilizado como alimento humano ou ração animal, devido às qualidades nutricionais. Tem um alto potencial produtivo e bastante responsivo á tecnologia, como Penergetic. O objetivo deste estudo foi estudar a resposta da adição de Penergetic-P e de Penergetic-K no crescimento e na produtividade da soja. Foram (conduzidos cinco tratamentos no campo: 1-) controle (sem NPK e/ou Penergetic); 2-) 290 kg ha -1 NPK (04-24-18) + Micro; 3-) 300 g ha -1 de Penergetic-P + 290 kg ha -1 NPK (04-24-18) + sulfato (S); 4-) 300 g ha -1 de Penergetic-K; 5-) 300 g ha -1 de Penergetic-P + 300 g ha -1 Penergetic-K. O delineamento experimental foi em blocos casualizados com 3 repetições. As médias foram comparadas usando a ANOVA e o teste de Duncan (p ≤ 0,05). Não foi observada diferença significativa no NNP entre os tratamentos, porém, a massa seca dos nódulos (MSN) teve diferença significativa entre os tratamentos, sendo que a adição Penergetic-K no solo aumentou a MSN em relação à adição de somente NPK e micronutrientes. A produção de massa seca raízes (MSR), massa seca parte aérea (MSPA), massa seca total, relação MSPA/MSR, o índice de clorofila, nitrogênio da parte aérea não teve diferença significativa entre os tratamentos. A produtividade de grãos foi menor com a adição de NPK e micronutrientes e foi aumentada com a adição de Penergetic-K. A utilização do Penergetic-K proporcionou um incremento ...

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Soybean growth and yield under cover crops

Cited by 10 publications

References 19 publications

Interação entre volume de vaso e competição com plantas daninhas sobre o crescimento da soja

Interação entre volume de vaso e competição com plantas daninhas sobre o crescimento da soja

Response of soil fungi and biological processes to crop residues in no-tillage system

Growth and Yield of Soybean With Penergetic Application

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