Efeitos da precipitação pluvial, da umidade relativa do ar e de excesso e déficit hídrico do solo no peso do hectolitro, no peso de mil grãos e no rendimento de grãos de trigo

Guarienti, E. M.; Ciacco, César Francisco; Cunha, G. R. da; Duca, L. de J. A. Del; Camargo, Celina Maria de Oliveira

doi:10.1590/s0101-20612005000300004

Cited by 27 publications

(21 citation statements)

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“…On the other hand, a monoculture reduces TGW and hectoliter weight in wheat (GUARIENTI et al, 2005a). Guarienti et al (2005b) also reported that precipitation at the beginning of the maturation stage reduces TGW and hectoliter weight, along with increasing the rate of mineral matter in the grains, especially in situations of excessive water on the ground and high humidity in the air. On September 30, 2013 and October 3, 2013 there was 31.0 mm and 42.0 mm of rainfall, respectively, which may explain the lower hectoliter weight in the absence of grazing (Figure 1).…”

Section: Without Grazing One Grazing Vs Without Grazing Two Grazings mentioning

confidence: 94%

Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

Taffarel

Oliveira

Piano

et al. 2017

SCA

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This study aimed to evaluate the effects of grazing on the agronomic characteristics, grain yield, and presence of the mycotoxins aflatoxins, fumonisins, and zearalenone in IPR 126 oat, BRS Tarumã wheat, and IPR 111 triticale. This study was performed from April 24, 2012 to November 11, 2013 at UNIOESTE's Experimental Farm in southern Brazil. The experimental design was a randomized block in a banded scheme, with four replications. The treatments in the A tracks were the three crops and the B tracks, the treatments: without grazing, one grazing event, or two grazing events. One grazing reduced the productivity of oat by 42.48% and triticale by 28.09% and increased wheat productivity by 24.89%. Two grazings reduced oat productivity by 54.14%, wheat by 40.96%, and triticale by 54.69%. Crops subjected to two grazings should be used for dry matter production for ground cover or partially used for silage when the plant is in the pasty or semi-hard grain stage, as grazing affects the agronomic characteristics and grain yield. The BRS Tarumã wheat, when used in crop-livestock integration systems, should be grazed only once due to increased productivity, while IPR 126 oat and IPR 111 triticale should not be grazed in crop-livestock integration systems for commercial production of grain. Oats from grazed plants should not be added to feeds of poultry in the early stage or pigs in the early and growth stages due to the higher levels of aflatoxins, fumonisins, and zearalenone. Grazing of winter crops increases the length of the crop cycle and grain formation will occur under climatic conditions favorable to the mycotoxins. Therefore, when grains are intended for human consumption, grazing is not recommended, as it increases the possibility of aflatoxins, fumonisins, and zearalenone at levels above the maximum tolerable levels permitted by law. These grains should be supplied to animals only after analysis of the mycotoxin levels present in the grains. ResumoObjetivou-se avaliar os efeitos dos pastejos nas características agronômicas, produtividade de grãos e presença das micotoxinas: aflatoxinas, fumonisinas e zearalenona em grãos de aveia IPR 126, trigo BRS Tarumã e triticale IPR 111. O trabalho foi desenvolvido no período de 24/04/2012 a 21/03/2014 (24º31'56,1''S; 54º01'10.3"O). O delineamento experimental foi em blocos ao acaso em esquema de faixas, com quatro repetições. Os tratamentos nas faixas A foram as três culturas e nas faixas B os manejo:sem pastejo, um pastejo e dois pastejos. O manejo com apenas um pastejo reduziu a produtividade de grãos da aveia em 42,48% e do triticale em 28,09% e aumentou a produtividade do trigo em 24,89%. O manejo com dois pastejos reduziu a produtividade da aveia em 54,14%, do trigo em 40,96% e do triticale em 54,69%. As culturas submetidas a dois pastejos devem ser diferidas para produção de matéria seca para cobertura do solo ou utilizar de forma parcial a planta no estágio de grãos pastosos ou semiduros para silagem, pois o pastejo prejudica as características agronômicas e...

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Section: Without Grazing One Grazing Vs Without Grazing Two Grazings mentioning

confidence: 94%

Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

Taffarel

Oliveira

Piano

et al. 2017

SCA

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“…Adapted from Guerra and Antonini, (1996). germination of grains still in the ear, and losses in grain yield (Guarienti et al, 2005).…”

Section: Figmentioning

confidence: 99%

Wheat phenology and yield under drought: A review

Sarto¹,

Sarto²,

Rampim³

et al. 2017

Aust J Crop Sci

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The purpose of this review was to characterize the wheat crop phenology under drought conditions, at different stages of crop growth. Effects of drought on wheat plants are variable, and depend on the phenological stage of the plant as well as the duration, intensity and frequency of the drought. The crop evapotranspiration increases over the course of the phenological cycle, reaching a maximum in the growth stage (from the beginning of heading until the end of flowering), which is the most sensitive stage of the crop to drought. At ripening, the evapotranspiration decreases to save and allocate the energy to grain yield. The drought affects the plant density in the initial phase, tiller number per plant in the tillering phase, and plant height in the stretching phase, most severely. At the flowering stage, the processes related to fertilization and fixation of grain are most severely affected, i.e., the number of viable seeds per area decreases. In the grain formation stage, the ability of the source (leaf) to use and translocate the assimilates to the grain is most severely affected, thus affecting the grain weight.

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“…Guarienti et al (2005) verificaram que o excesso hídrico do solo afetou de forma negativa o peso do hectolitro, peso de mil grãos e a produtividade nos Estados do Rio Grande do Sul e Santa Catarina. Para o cultivo de trigo irrigado, todas as regiões apresentaram-se aptas em determinados decêndios, quando as temperaturas registradas estão na faixa ideal de cultivo, possibilitando-o sem restrições térmicas.…”

Section: Precipitação (Mm)unclassified

“…Segundo Guerra et al (1994), na Região central do Brasil, onde estão presentes intensas atividades agrícolas, no cultivo de inverno faz-se necessário a utilização de irrigação no período que vai de maio a setembro e eventualmente na estação chuvosa pela ocorrência de veranicos. Isso é possível graças à abundância hídrica presente nos mananciais, rios, lagos e represas na região.…”

Section: Introductionunclassified

Aptidão agroclimática do trigo para as regiões de Rondonópolis, São José do Rio Claro, São Vicente e Tangará da Serra, Mato Grosso, Brasil

Cordeiro¹,

Dallacort²,

Freitas³

et al. 2015

Agro@mbiente

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Resumo: A cultura do trigo, assim como a maioria das culturas, é fortemente influenciada pelo ambiente em que é cultivada, principalmente quanto à temperatura e umidade do solo, justificando assim estudos de adaptabilidade para a cultura em novas regiões. Nesse sentido, objetivou-se com este trabalho determinar a aptidão climática e quais as melhores épocas de semeadura do trigo para as microrregiões de Rondonópolis, São José do Rio Claro, São Vicente e Tangará da Serra. Utilizaram-se dados climáticos de temperatura e precipitação disponibilizados pelo INMET para as microrregiões em estudo. As melhores épocas de semeadura em Rondonópolis em cultivo de sequeiro são os decêndios 1, 2 e do 29 ao 36, e irrigado, o decêndio 13. Em São José do Rio Claro, recomenda-se a semeadura de sequeiro nos decêndios 1, 2, 3 e do 27 ao 36, e irrigado nos decêndios 13 e 14. São Vicente apresentou os decêndios 7, 24 e 25 aptos para o cultivo de sequeiro, e os decêndios que vão do 1 ao 6, do 8 ao 23 e do 26 ao 36 aptos para o cultivo irrigado. Tangará da Serra apresenta os decêndios 4 e 5 aptos para sequeiro e do 6 ao 18 para irrigado. Todas as regiões são aptas ao cultivo de trigo irrigado no período de inverno considerando a temperatura média local. Palavras-chave:Adaptabilidade. Balanço hídrico. Precipitação. Triticum aestivum. Abstract:The wheat crop, like most cultures, is strongly influenced by the environment in which it is grown, mainly in terms of temperature and soil moisture, thus justifying adaptability studies for culture in new regions. In this sense, the aim of this work was to establish the climatic aptitude and best wheat sowing dates for micro-regions of Rondonópolis, São José do Rio Claro, São Vicente and Tangará da Serra. We used climatic temperature and precipitation data provided by INMET for study. The best sowing dates in Rondonópolis in rainfed crop are the periods of decendial 1, 2 and 29-36, and irrigated, decendial 13. In São José do Rio Claro, it is recommended to dry sowing in periods of decendial 1, 2, 3 and 27-36, and irrigation in periods of decendial 13 and 14. São Vicente presented the periods of decendial 7, 24 and 25 suitable for rainfed crop and periods of decendials ranging from 1-6, the 8-23 and 26-36 fit for irrigated cultivation. Tangará da Serra has the periods of decendial 4 and 5 suitable for rainfed and irrigated to 6-18. All regions are able to irrigated wheat crop in the winter period on the average local temperature.

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Efeitos da precipitação pluvial, da umidade relativa do ar e de excesso e déficit hídrico do solo no peso do hectolitro, no peso de mil grãos e no rendimento de grãos de trigo

Cited by 27 publications

References 0 publications

Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

Wheat phenology and yield under drought: A review

Aptidão agroclimática do trigo para as regiões de Rondonópolis, São José do Rio Claro, São Vicente e Tangará da Serra, Mato Grosso, Brasil

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