Data/hora: 09/06/2024 10:39:25

Provedor de dados: 	106	
País: 	Thailand	
Título: 	ผลของการเปลี่ยนแปลงสภาพภูมิอากาศต่อการระบาดของโรคข้าว จังหวัดเชียงรายและพะเยา

Effects of climate change on rice diseases in Chiangrai and Phayao provinces	
Autores: 	Nootjarin Jungkhun; Piyapa Srikhom; Konsiri Srinil; Taraporn Yuneyong; Kanteera Kanta.	
Data: 	2015-05-14	
Ano: 	2014	
Palavras-chave: 	Climate change; Temperature; Relative humidity; Rainfall; Rice disease; Epidemic; Global warming; Rice pathogen; Rice; Rice production; Phitsanulok 2 variety; Sanpatong 1 variety; Plant diseases survey; Pathogens; Chiangrai province; Phayao province; ข้าว; พันธุ์พิษณุโลก 2; พันธุ์สันป่าตอง 1; การผลิตข้าว; การสำรวจโรคพืช; โรคข้าว; เชื้อสาเหตุของโรค; การระบาดของโรค; ภาวะโลกร้อน; การเปลี่ยนแปลงสภาพภูมิอากาศ; อุณหภูมิ; ความชื้นสัมพัทธ์; ปริมาณน้ำฝน; การประเมินความเสียหาย; จ.เชียงราย; จ.พะเยา.	
Resumo: 	Main objective of this study was to evaluate the relationship between climate changes and rice disease s epidemics in Chiangrai and Phayao provinces. The study was conducted at Chiangrai Rice Research Center during the year 2011-2013 by monthly broadcasting two popular rice varieties in the area; Phitsanulok 2 and Sanpatong 1. The experiment was carried out in Split plot in RCB Design with 3 replicates having month as main plot and variety as sub-plot. Disease incidence and severity were evaluated at 3 growth stages i.e. 20, 50 and 90 days after sowing. Concurrently, Disease incidence and severity were recorded for rice diseases in the farmers’ fields of Chiangrai and Phayao provinces having infected at 10 rai and above. Disease data showed that both rice varieties, had an increasing variety of diseases and level of severity every year. The highest severity of rice blast disease occurred at seedling stage of both rice varieties with the favorable weather conditions being the average temperature between 25.22 to 26.82 °C, average relative humidity between 79.52 to 82.92% and average rainfall between 55.5 to 501.5 mm. For brown spot disease, the severity was highest at tillering stage with favorable weather conditions being, the average temperature  between 22.06 to 25.23 °C, average relative humidity between 78.28 to 81.13 % and average rainfall between 7.3 to 79.5 mm. At grain filling stage, bacterial leaf blight severity was highest with favorable climatic conditions being the average temperature between 25.72 to 28.41 °C, average relative humidity between 62.27 to 81.61 % and  rainfall amount varied  from 2.2 to 24.2 mm. Results from farmers’ fields surveying in Chiangrai and Phayao during the year 2011-2013 showed that the yearly increasing level of severity of rice diseases rating from the highest one being rice blast followed by bacterial leaf blight, bakanae disease, brown spot, and narrow brown spot diseases similar to that recorded in the experimental plots. Comparing each year Chiangrai weather data from 2011-2013 and the 30 years long-term data of 3 climatic factors i.e temperature, relative humidity and rainfall, it was noticed that the average maximum temperature had increased by 3.09 °C. In contrast, the average minimum temperature was reduced by 2.32 °C. The average relative humidity and rainfall were increased by 1.29 % and 38.98 mm., respectively. These data indicated that the range between the maximum and minimum temperature during 2011-1013 was broader than the long-term data while the relative humidity and rainfall were higher than the long-term ones. Despite of the change In these weather conditions, rice blast and bacterial leaf blight remained significant as major diseases. However, a variety and severity of minor diseases had increased over the years. Results suggested the potential having more diverse rice disease occurrence and severity in the future. Part of the reasons was possibly due to the good adaptation to climate changes of the causal agents. Thus, the study awaited to be carried out on pathogen diversity, rice blast and bacterial leaf blight in particular, would further clarify the results in this study.	
Tipo: 	PhysicalObject	
Idioma: 	Thailandês	
Identificador: 	[Proceeding of rice research conference 2014: Rice research center groups in upper and lower northern region], Chainat (Thailand), p. 104-119

http://anchan.lib.ku.ac.th/agnet/handle/001/5695

เอกสารประกอบการสัมมนาวิชาการกลุ่มศูนย์วิจัยข้าวภาคเหนือตอนบนและภาคเหนือตอนล่าง ประจำปี 2557, ชัยนาท, หน้า 104-119	
Formato: 	434 p.	
Fonte: 	ลิขสิทธิ์เป็นของเจ้าของบทความแต่เพียงผู้เดียว

สงวนลิขสิทธิ์ตามพระราชบัญญัติลิขสิทธิ์ พ.ศ. 2537

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