Data/hora: 02/06/2024 05:18:18

Provedor de dados: | 106
País: | Thailand

Título:

อิทธิพลของช่วงเวลาปลูกต่อผลผลิตและคุณภาพข้าวนาชลประทานสายพันธุ์ดีเด่น

Effect of planting date on yield and grain quality of promissing irrigated rice

Autores: | Wannakorn Intarasatit; Sa-ang Chairin; Suradet Palawisut.
Data: | 2016-02-26
Ano: | 2015
Palavras-chave: | Effect of planting date; Yield; Physical quality; Milling quality; Promissing line; อิทธิพลของช่วงเวลาปลูก; ผลผลิต; คุณภาพข้าวทางกายภาพ; คุณภาพการสี; สายพันธุ์ดีเด่น.
Resumo: | Climate change has an impact on rice yield and quality. Heat highly affects rice during flowering stage, as during the stage rice is extremely sensitive to temperature environment. It has been reported that, different rice variety was affected by temperature differently. For Asian country, the highest temperature during the day in summer was about 35 to 41oC or higher resulting in heat intolerance in rice that causes the high percentage of unfilled grain. Heat is also the major cause of cracked-grain leading to the higher number of broken milled rice after milling. The temperature which is higher than 35oC can cause a severe problem in rice plant development in either vegetative phase or reproductive phase that can be determined by the lower number of panicle and seed per panicle. For low temperature, cold can cause a problem while the plant is at the panicle formation and anthesis stage. The critical temperature causing sterility in cold tolerant rice variety is 15-17oC, while it is 17-19oC for cold sensitive variety. It can be said that the critical temperature leads to sterility during anthesis in rice is 15-20oC. It is reported that at 8.5 to 10 days prior flowering time was the critical duration where rice can be highly sensitive to the cold. The main aim of this research was to search for both a suitable period for rice planting and the critical period which the planting should be avoided in order to gain a high quality rice product in irrigated rice cultivation system. We performed the RCB experiment with triplication by planting rice in every 10 days for the whole cultivated season. The broadcasting method was for planting PSL05101-93-1-3-2 elite (promissing) line by using the seed ratio of 1.5 kg/ rai for 4x6 m area with 12-6-6 fertilizer (N-P2O5-K2O). We harvested the rice products in the area of 2x5 m after 30 days of flowering. The harvested rice were then threshed, sun-dried, and cleaned, before rice grain at 14% RH  were  weighted  and  analyzed of their  milling quality including other  physical quality. The results showed that the elite line which was planted in every other 10 days from 30th June 2013 to 4th August 2014 had significantly different physical properties and other characteristics by Pearson’s correlation analysis at P &lt; 0.05. It is noted that rice yield and the lowest temperature at 45 and 55 days after planting or during the early stage of panicle formation were ultimately correlated. Moreover, the lowest temperature at 75% of flowering and 15 days before flowering was significantly related to rice yield. Correspondingly, there was significantly correlation between the percentage of head rice and broken rice and the temperature at 10 days before harvesting.
Tipo: | Collection
Idioma: | Thailandês

Identificador:

[Proceeding of The 8th rice research conference 2015: Rice research center groups in upper and lower northern region], Chiang Rai (Thailand), p. 106-150

http://anchan.lib.ku.ac.th/agnet/handle/001/5934

เอกสารประกอบการสัมมนาวิชาการกลุ่มศูนย์วิจัยข้าวภาคเหนือตอนบนและภาคเหนือตอนล่าง ประจำปี 2558, เชียงราย หน้า 106-150

Formato: | 298 p.

Fonte:

ลิขสิทธิ์เป็นของเจ้าของบทความแต่เพียงผู้เดียว

สงวนลิขสิทธิ์ตามพระราชบัญญัติลิขสิทธิ์ พ.ศ. 2537

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