cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.19928878.v1
title: Agronomic performance of common bean in straw mulch systems and topdressing nitrogen rates in no-tillage

description: ABSTRACTIn no-tillage systems, straw coverage on soil surface is the key to success, and the choice of crops for rotation is crucial to achieve the sustainability and quality that conservation agriculture requires. The objective of this study was to evaluate the agronomic performance of the common bean cultivar IAC Formoso sown in succession to three straw mulch systems (corn alone, corn/Urochloa ruziziensisintercrop and U. ruziziensisalone) and topdress nitrogen rates (0; 40; 80; 120 and 160 kg ha-1N), at the four-leaf stage, three years after the implementation of no-tillage. The experiment was arranged in a randomized block split plot design, with three replications. Common bean highest yields were achieved in succession to U. ruziziensisalone and intercropped with corn. The corn/U. ruziziensisintercrop provided both straw and seed production, allowing for quality no-tillage. Topdressed nitrogen influenced the common bean yield when in succession to corn alone, U. ruziziensisalone and corn/U. ruziziensisintercrop in no-tillage.
DOI: 10.6084/m9.figshare.19928879
title: Biofertilizers in cabbage seedlings production

description: ABSTRACTThe use of biofertilizers such as bacterial fermentation broth containing amino acids is poorly studied in the production of organic seedlings. The aim of this study was to test the effect of foliar spraying of the sugarcane fermented broth containing 30% of L- glutamic acid, on the growth of cabbage seedlings, without using synthetic fertilizers. The treatments consisted of foliar spraying with solutions containing different concentrations of fermented broth (0, 0.1, 0.2, 0.4 and 0.8 mL L-1), in four repetitions, in intervals of seven or fourteen days. At 35 days after sowing, the following variables were determined: chlorophyll relative index, leaf area and root volume. The fermented broth increased the chlorophyll relative index, leaf area and root volume when applied in intervals of fourteen days, and increased the root volume when applied in intervals of seven days. There was a reduction in leaf area when applied in concentrations higher than 0.2 ml L-1in intervals of seven days. The biofertilizer enhanced the development of cabbage seedlings.
DOI: 10.6084/m9.figshare.19928879.v1
title: Biofertilizers in cabbage seedlings production

description: ABSTRACTThe use of biofertilizers such as bacterial fermentation broth containing amino acids is poorly studied in the production of organic seedlings. The aim of this study was to test the effect of foliar spraying of the sugarcane fermented broth containing 30% of L- glutamic acid, on the growth of cabbage seedlings, without using synthetic fertilizers. The treatments consisted of foliar spraying with solutions containing different concentrations of fermented broth (0, 0.1, 0.2, 0.4 and 0.8 mL L-1), in four repetitions, in intervals of seven or fourteen days. At 35 days after sowing, the following variables were determined: chlorophyll relative index, leaf area and root volume. The fermented broth increased the chlorophyll relative index, leaf area and root volume when applied in intervals of fourteen days, and increased the root volume when applied in intervals of seven days. There was a reduction in leaf area when applied in concentrations higher than 0.2 ml L-1in intervals of seven days. The biofertilizer enhanced the development of cabbage seedlings.
DOI: 10.6084/m9.figshare.19928882
title: Interaction between pot size and competition with weeds on the soybean growth

description: ABSTRACT Evaluation of the competition effects between soybean and weed is done in protected environments. These test are usually done in pots where is studied the desired effects at different sampling/harvest times. The pots size to be chosen depends on the type of study, plant species and the variables that will be studied. Thus, the aim of this work was to verify the effect of the pots size in competitive ability of soybean with Urochloa brizantha and Bidens pilosa. The experiment was conducted in a protected environment and was arranged in a randomized block design in factorial 3 × 5 with four replications. Factors considered in the experiment were three systems of competition (soybeans grown alone, soybeans + U. brizantha and soybean + B. pilosa) and five pots size (2, 4, 7, 10 and 16 dm3). Growth soybean was affected for pots size and for U. brizantha and B. pilosa competition. U. brizantha was more competitive with soybean than B. pilosa. Pots with biggest volumetric capacity increased the effects of the competition on growth soybean.
DOI: 10.6084/m9.figshare.19928882.v1
title: Interaction between pot size and competition with weeds on the soybean growth

description: ABSTRACT Evaluation of the competition effects between soybean and weed is done in protected environments. These test are usually done in pots where is studied the desired effects at different sampling/harvest times. The pots size to be chosen depends on the type of study, plant species and the variables that will be studied. Thus, the aim of this work was to verify the effect of the pots size in competitive ability of soybean with Urochloa brizantha and Bidens pilosa. The experiment was conducted in a protected environment and was arranged in a randomized block design in factorial 3 × 5 with four replications. Factors considered in the experiment were three systems of competition (soybeans grown alone, soybeans + U. brizantha and soybean + B. pilosa) and five pots size (2, 4, 7, 10 and 16 dm3). Growth soybean was affected for pots size and for U. brizantha and B. pilosa competition. U. brizantha was more competitive with soybean than B. pilosa. Pots with biggest volumetric capacity increased the effects of the competition on growth soybean.
DOI: 10.6084/m9.figshare.19928885.v1
title: Effects of growth reducer and nitrogen fertilization on morphological variables, SPAD index, interception of radiation and productivity of wheat

description: ABSTRACT The objective of this study was to evaluate the effect of growth reducer and nitrogen fertilization on morphological variables, SPAD index, radiation interception, and grain yield of three cultivars of wheat. The experimental design was a randomized block in factorial scheme 3x5x2, with three cultivars (Mestre, Iguaçú and Itaipú), five nitrogen doses (0, 40, 80, 120, 160 Kg ha-1), and application or no application of a growth reducer, with three replications. The following characteristics were evaluated: plant height, SPAD index, leaf area index (LAI), Global Radiation Interception (GRI) and grain yield. The Tukey test (p &lt; 0.05) was used for the comparison between the means of cultivar and growth reducer factors, and for a regression analysis to evaluate N levels. Increasing the dose of nitrogen promotes an increase in LAI of plants of wheat crops differently among cultivars, which leads to a greater degree of global radiation interception. At doses higher or equal to 120 Kg ha-1 of nitrogen, there are significant differences in grain yield between treatments with and without the application of the growth reducer. The significant interaction between growth reducer and nitrogen dose, showed that applications of growth reducer increase the GRI at doses above and below 80 Kg ha-1 of nitrogen. Nitrogen rates of 138 and 109 Kg ha-1 are responsible for maximum grain yields of wheat, which is 4235 and 3787 Kg ha-1 with and without the use of growth reducer, respectively.
DOI: 10.6084/m9.figshare.19928885
title: Effects of growth reducer and nitrogen fertilization on morphological variables, SPAD index, interception of radiation and productivity of wheat

description: ABSTRACT The objective of this study was to evaluate the effect of growth reducer and nitrogen fertilization on morphological variables, SPAD index, radiation interception, and grain yield of three cultivars of wheat. The experimental design was a randomized block in factorial scheme 3x5x2, with three cultivars (Mestre, Iguaçú and Itaipú), five nitrogen doses (0, 40, 80, 120, 160 Kg ha-1), and application or no application of a growth reducer, with three replications. The following characteristics were evaluated: plant height, SPAD index, leaf area index (LAI), Global Radiation Interception (GRI) and grain yield. The Tukey test (p &lt; 0.05) was used for the comparison between the means of cultivar and growth reducer factors, and for a regression analysis to evaluate N levels. Increasing the dose of nitrogen promotes an increase in LAI of plants of wheat crops differently among cultivars, which leads to a greater degree of global radiation interception. At doses higher or equal to 120 Kg ha-1 of nitrogen, there are significant differences in grain yield between treatments with and without the application of the growth reducer. The significant interaction between growth reducer and nitrogen dose, showed that applications of growth reducer increase the GRI at doses above and below 80 Kg ha-1 of nitrogen. Nitrogen rates of 138 and 109 Kg ha-1 are responsible for maximum grain yields of wheat, which is 4235 and 3787 Kg ha-1 with and without the use of growth reducer, respectively.
DOI: 10.6084/m9.figshare.19928887.v1
title: Decomposition of ground biomass of secondary forest and yield of annual crops in no tillage

description: ABSTRACT The objective of this work was to evaluate the dynamics of decomposition process of chopped secondary forest system, previously enriched with legumes Inga velutina Willd. and Stryphnodendron pulcherrimum (Willd.) Hochr. and the contribution of this process to the nutrient input to the cultivation of corn and bean under no-tillage. The experimental design was a randomized block, split plot with four replications. The plots were two species (I. velutina and S. pulcherrimum) and the subplots were seven times of evaluation (0, 7, 28, 63, 189, 252, 294 days after experiment installation). There was no difference (p ≥ 0.05) between the secondary forest systems enriched and no interaction with times for biomass waste, decomposition constant and half-life time. The waste of S. pulcherrimum trees had higher (p &lt; 0.05) C/N ratio than that I. velutina. However, this one was higher (p &lt; 0.05) in lignin content. Nevertheless, the dynamics of residue decomposition was similar. The corn yield was higher (p &lt; 0.05) in cultivation under I.velutina waste. Meanwhile, the beans planted after corn, shows similar (p &gt; 0.05) yield in both areas, regardless of the waste origin.
DOI: 10.6084/m9.figshare.19928887
title: Decomposition of ground biomass of secondary forest and yield of annual crops in no tillage

description: ABSTRACT The objective of this work was to evaluate the dynamics of decomposition process of chopped secondary forest system, previously enriched with legumes Inga velutina Willd. and Stryphnodendron pulcherrimum (Willd.) Hochr. and the contribution of this process to the nutrient input to the cultivation of corn and bean under no-tillage. The experimental design was a randomized block, split plot with four replications. The plots were two species (I. velutina and S. pulcherrimum) and the subplots were seven times of evaluation (0, 7, 28, 63, 189, 252, 294 days after experiment installation). There was no difference (p ≥ 0.05) between the secondary forest systems enriched and no interaction with times for biomass waste, decomposition constant and half-life time. The waste of S. pulcherrimum trees had higher (p &lt; 0.05) C/N ratio than that I. velutina. However, this one was higher (p &lt; 0.05) in lignin content. Nevertheless, the dynamics of residue decomposition was similar. The corn yield was higher (p &lt; 0.05) in cultivation under I.velutina waste. Meanwhile, the beans planted after corn, shows similar (p &gt; 0.05) yield in both areas, regardless of the waste origin.
DOI: 10.6084/m9.figshare.19928888
title: Liming in microparticle applied on the sowing furrow increases common bean yield

description: ABSTRACT The application of a solution of liming (CaCO3) microparticles in the sowing furrow may accelerate the reaction of this corrective in the soil, alter soil chemical attributes and increases common bean (Phaseolus vulgaris L.) grain yield. The aim of this study was to test this hypothesis in soils with different chemical characteristics. It was done two experiments. In the first, it was evaluated the solution with CaCO3 doses (0, 1050, 2100, 4200, 8400 e 12600 g ha-1) applied on the sowing furrow for two growing season. In the second, the solution of CaCO3 (1050 g ha-1) was applied or not in the sowing furrow in four environment. The both experimental design was a complete randomized block design. The use of a solution with microparticle of CaCO3 increased pH values and reduced the Al+3 saturation in the soil. Concentration of Ca, K and base saturation of the soil were not affected by the addition of CaCO3 solution. The use of microparticle of CaCO3 solution in the sowing furrow increased common bean grain yield. Our results suggest that the use of microparticles of CaCO3 in the sowing furrow was efficient to change the soil chemical properties in the sowing and provided significant increases in common bean grain yield.
DOI: 10.6084/m9.figshare.19928888.v1
title: Liming in microparticle applied on the sowing furrow increases common bean yield

description: ABSTRACT The application of a solution of liming (CaCO3) microparticles in the sowing furrow may accelerate the reaction of this corrective in the soil, alter soil chemical attributes and increases common bean (Phaseolus vulgaris L.) grain yield. The aim of this study was to test this hypothesis in soils with different chemical characteristics. It was done two experiments. In the first, it was evaluated the solution with CaCO3 doses (0, 1050, 2100, 4200, 8400 e 12600 g ha-1) applied on the sowing furrow for two growing season. In the second, the solution of CaCO3 (1050 g ha-1) was applied or not in the sowing furrow in four environment. The both experimental design was a complete randomized block design. The use of a solution with microparticle of CaCO3 increased pH values and reduced the Al+3 saturation in the soil. Concentration of Ca, K and base saturation of the soil were not affected by the addition of CaCO3 solution. The use of microparticle of CaCO3 solution in the sowing furrow increased common bean grain yield. Our results suggest that the use of microparticles of CaCO3 in the sowing furrow was efficient to change the soil chemical properties in the sowing and provided significant increases in common bean grain yield.
DOI: 10.6084/m9.figshare.19928890
title: Diagnostic leaf to evaluate the nutritional status of Jatropha

description: ABSTRACT The analytical determination of nutrient levels in recently mature leaves in order to diagnose nutritional status is based on the fact that leaves are metabolically active and more sensitive to variation in nutrients of the soil. In most of cases, there is a direct well known between foliar content and the development and yield of the plant. However, for a more accurate interpretation, it is essential to establish the index leaf. There are few published studies about Jatropha with contrasting results. In order to establish the index leaf, in adult plants, the macronutrient levels were evaluated in samples collected in experimental plots, in which doses of nitrogen and phosphorus were applied, in two parts of the floral branches (in the top and in the middle thirds); and in three positions of leaves of the floral branch (between the 1st and 3rd, 6th and 8th, and 13th and 15th leaves below the inflorescence). The location of the leaf on the plant significantly affects nutrient contents. Nitrogen, phosphorus, potassium and sulfur tend to have higher concentration in young tissues. Calcium and magnesium showed higher levels in the basal leaves of floral branches. Samples collected in the top third of plants (between the 6th and 15th leaves of the floral branch) are more sensitive to variations of nitrogen and phosphorus fertilization. Therefore, we indicate the 6th to 15th leaves of the top third plants as index leaves estimate nutritional status of Jatropha.
DOI: 10.6084/m9.figshare.19928890.v1
title: Diagnostic leaf to evaluate the nutritional status of Jatropha

description: ABSTRACT The analytical determination of nutrient levels in recently mature leaves in order to diagnose nutritional status is based on the fact that leaves are metabolically active and more sensitive to variation in nutrients of the soil. In most of cases, there is a direct well known between foliar content and the development and yield of the plant. However, for a more accurate interpretation, it is essential to establish the index leaf. There are few published studies about Jatropha with contrasting results. In order to establish the index leaf, in adult plants, the macronutrient levels were evaluated in samples collected in experimental plots, in which doses of nitrogen and phosphorus were applied, in two parts of the floral branches (in the top and in the middle thirds); and in three positions of leaves of the floral branch (between the 1st and 3rd, 6th and 8th, and 13th and 15th leaves below the inflorescence). The location of the leaf on the plant significantly affects nutrient contents. Nitrogen, phosphorus, potassium and sulfur tend to have higher concentration in young tissues. Calcium and magnesium showed higher levels in the basal leaves of floral branches. Samples collected in the top third of plants (between the 6th and 15th leaves of the floral branch) are more sensitive to variations of nitrogen and phosphorus fertilization. Therefore, we indicate the 6th to 15th leaves of the top third plants as index leaves estimate nutritional status of Jatropha.
DOI: 10.6084/m9.figshare.19928891
title: Productivity of irrigated beans due to sources of stabilized nitrogen fertilizer and controlled release

description: ABSTRACT New nitrogen fertilizers are available in the market actually, however, does not have results on the efficiency of the Cerrado conditions. With that objective of this study was to evaluate the effect of urea including stabilized and controlled release urea on yield of irrigated common beans (Phaseolus vulgaris L) in no-tillage system. The experiment was conducted in the winter crop, at Embrapa Arroz e Feijão, in Santo Antônio de Goiás, State of Goiás, Brazil. The experimental design was randomized blocks, with five replicates. Treatments consisted of five N sources (urea, urea + NBPT, urea + polymer, ammonium sulphate, and ammonium nitrate) and a control (without N) being applied 20 kg ha-1 of N at sowing and 80 kg ha-1 onf N in topdressing. We evaluated the chlorophyll content in leaves of common beans, the leaf N content and dry mass weight (MSPA) in the flowering of common beans, the number of pods per plant, number of grains per pod, mass of 100 grains, grain yield and final stand of the common beans. The sources of nitrogen fertilizer did not influence, leaf N content, the mass of MSPA and the relative chlorophyll index of common beans. The use of polymerized urea and urea with urease inhibitor, did not produce increases in the number of grains per pod, number of pods per plant, mass of 100 grains and common beans yield compared to traditional sources of N, urea, ammonium sulfate and ammonium nitrate.
DOI: 10.6084/m9.figshare.19928891.v1
title: Productivity of irrigated beans due to sources of stabilized nitrogen fertilizer and controlled release

description: ABSTRACT New nitrogen fertilizers are available in the market actually, however, does not have results on the efficiency of the Cerrado conditions. With that objective of this study was to evaluate the effect of urea including stabilized and controlled release urea on yield of irrigated common beans (Phaseolus vulgaris L) in no-tillage system. The experiment was conducted in the winter crop, at Embrapa Arroz e Feijão, in Santo Antônio de Goiás, State of Goiás, Brazil. The experimental design was randomized blocks, with five replicates. Treatments consisted of five N sources (urea, urea + NBPT, urea + polymer, ammonium sulphate, and ammonium nitrate) and a control (without N) being applied 20 kg ha-1 of N at sowing and 80 kg ha-1 onf N in topdressing. We evaluated the chlorophyll content in leaves of common beans, the leaf N content and dry mass weight (MSPA) in the flowering of common beans, the number of pods per plant, number of grains per pod, mass of 100 grains, grain yield and final stand of the common beans. The sources of nitrogen fertilizer did not influence, leaf N content, the mass of MSPA and the relative chlorophyll index of common beans. The use of polymerized urea and urea with urease inhibitor, did not produce increases in the number of grains per pod, number of pods per plant, mass of 100 grains and common beans yield compared to traditional sources of N, urea, ammonium sulfate and ammonium nitrate.
DOI: 10.6084/m9.figshare.19928894
title: Selectivity and efficiency of herbicides in controlling weeds on cowpea crop

description: ABSTRACT A lack of knowledge about herbicides for chemical weed control is one of the major difficulties for the expansion of the cowpea crop in the mid-south region of Brazil. Aiming to evaluate the selectivity and efficiency of herbicides for cowpea crop, two field experiments, one of them with BRS Guariba and the other with BRS Novaera, were carried out in Botucatu, São Paulo, Brazil. In both experiments, the experimental design was a randomized block, in a 3 x 2 + 2 factorial scheme, with four replications. The treatments were a combination of three herbicides (bentazon, fomesafen, and diclosulam) and two application times (early and late), besides a weeded control and a non-weeded control. The herbicide diclosulan provided high phytotoxicity and reduced plant population, while bentazon provided the lowest levels of phytointoxication in both cowpea cultivars. The fomesafen, especially when applied in the initial phase, was the most effective in controlling weeds and even causing phytotoxicity to cowpea crop, provided adequate population of plants and grain yield similar to those obtained in the weeded control. Thus, it is concluded that the herbicide fomesafen is the most efficient to both cowpea cultivars.
DOI: 10.6084/m9.figshare.19928894.v1
title: Selectivity and efficiency of herbicides in controlling weeds on cowpea crop

description: ABSTRACT A lack of knowledge about herbicides for chemical weed control is one of the major difficulties for the expansion of the cowpea crop in the mid-south region of Brazil. Aiming to evaluate the selectivity and efficiency of herbicides for cowpea crop, two field experiments, one of them with BRS Guariba and the other with BRS Novaera, were carried out in Botucatu, São Paulo, Brazil. In both experiments, the experimental design was a randomized block, in a 3 x 2 + 2 factorial scheme, with four replications. The treatments were a combination of three herbicides (bentazon, fomesafen, and diclosulam) and two application times (early and late), besides a weeded control and a non-weeded control. The herbicide diclosulan provided high phytotoxicity and reduced plant population, while bentazon provided the lowest levels of phytointoxication in both cowpea cultivars. The fomesafen, especially when applied in the initial phase, was the most effective in controlling weeds and even causing phytotoxicity to cowpea crop, provided adequate population of plants and grain yield similar to those obtained in the weeded control. Thus, it is concluded that the herbicide fomesafen is the most efficient to both cowpea cultivars.