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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of Climate Variability and Degree-Day on Development, Yield and Quality of Shogun (Citrus reticulata Blanco) in Southern Thailand) ผู้เขียน: Isma-ae Chelong, Sayan Sdoodee สื่อสิ่งพิมพ์:pdf AbstractClimatic factors and degree-days are normally important in the development, yield and quality of fruits leading to commercial value. However, there has been no investigation of this aspect for shogun (Citrus reticulata Blanco). Hence, the fruit development, yield and quality of shogun under the influence of climatic factors were investigated using the framework of a quadrat cube (0.5 ? 0.5 ? 0.5 m) during two consecutive years (2011–2012). Forty 8-year-old uniform trees, field grown in Yala and Pattani provinces were used. The experiment was designed as a completely randomized design. It was evident that the weather conditions between 2011 and 2012 were different, with the rainfall in 2012 lower. The results showed that fruit yields in Pattani in 2011 and 2012 (38.89 and 36.69 kg per tree, respectively) were significantly (P ? 0.01) higher than those in Yala (27.74 and 18.53 kg per tree, respectively). Comparing 2011 and 2012, fruit yields in Pattani and Yala decreased 5.65 and 33.20%, respectively. The fruit diameters of shogun fruit in Pattani in 2011 and 2012 were 5.63 and 5.62 cm, while in Yala they were 5.02 and 4.98 cm, respectively, with growing degree-days of 3,387 and 2,989, and 3,153 and 2,780, respectively. The fruit quality in Pattani in 2011 and 2012 was better than in Yala based on the weight of fruit, peel and juice and peel thickness, whereas the total soluble solids in Pattani were lower than in Yala. Furthermore, the color of the rind in Pattani was greener than that in Yala. It was suggested that a decrease in the rainfall and soil moisture caused a negative impact on the fruit development, yield and quality of shogun in Yala. Hence climatic variability and degree-days influenced the development, yield and quality. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Water Deficit at Tasseling on Photosynthesis, Development, and Yield of Corn) ผู้เขียน: ดร.นวรัตน์ อุดมประเสริฐ, รองศาสตราจารย์ , Janjaree Kijjanon, Katharat Chusri-iam, Aneknan Machuay สื่อสิ่งพิมพ์:pdf AbstractThis study was conducted to determine the effects of water deficits on net assimilation rates and development which were causes of grain yield reduction in maize. Two maize inbreds, Ki3 (purported drought sensitive) and Ki11 (purported drought tolerance), were pot-grown in greenhouse. Plants were exposed to water deficit by withholding water until wilting occurred at tassel initiation and at anthesis. Water deficit at both stages reduced net assimilation rates (NAR) and relative growth rates (RGR) significantly in both maize inbreds. The reduction was more evident in Ki3 than that in Ki11. Water deficit at tassel initiation increased anthesis-to-silking interval (ASI) for 3 and 2 days in Ki3 and Ki11, respectively, while water deficit at anthesis increased ASI for only 1.25 and 0.75 days in Ki3 and Ki11, respectively. Considering yield and yield components, it was found that water deficits reduced ear girth, seed weight, grain yield, and harvest index in both inbreds. Water deficit at tassel initiation showed greater effects on those components than did the one at anthesis. |
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 Researcherนาย ธีระ สมหวังที่ทำงาน:สถานีวิจัยเขาหินซ้อน ศูนย์วิจัยและถ่ายทอดเทคโนโลยีการเกษตร คณะเกษตร สาขาที่สนใจ:การปรับปรุงพันธุ์พืช Resume |
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 Researcherนาง พรรณญาฎา ฉายศรีสุริยศที่ทำงาน:สถานีวิจัยลพบุรี ศูนย์วิจัยและถ่ายทอดเทคโนโลยีการเกษตร คณะเกษตร สาขาที่สนใจ:การปรับปรุงการผลิตพืชไร่เศรษฐกิจ Resume |
 Researcherนาย สกล ฉายศรีที่ทำงาน:ศูนย์วิจัยและถ่ายทอดเทคโนโลยีการเกษตร คณะเกษตร สาขาที่สนใจ:ปรับปรุงพันธุ์มันสำปะหลัง, ปรับปรุงพันธุ์ข้าวโพดหวาน Resume |
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 Researcherดร. สุปราณี งามประสิทธิ์ที่ทำงาน:ศูนย์วิจัยข้าวโพดและข้าวฟ่างแห่งชาติ คณะเกษตร สาขาที่สนใจ:วิทยาการเมล็ดพันธุ์, การผลิตเมล็ดพันธุ์พืช การตรวจสอบคุณภาพเมล็ดพันธุ์ Resume |