Kasetsart University
Thai Agricultural Research Repository (เครือข่ายสารสนเทศงานวิจัยเกษตรไทย)Not a member yet
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Effect of light intensity on growth and anthocyanin accumulation in leaves of black glutinious rice
No full textLight intensity is an important factor affected rice growth and productivity. A comparative study on the effects of light intensity were investigated in three cultivars of black glutinous rice No.19, 27 and 51. Seeds were hydroponically grown for 30 days then divided into 3 groups: grow under natural light condition (300 Klux) and under low light condition 2 levels (3 and 1 Klux) using shaded net. The effect of light intensity on four growth-stages including; seedling, tillering, heading and maturity was observed. The results showed that the low light intensity caused decrease fresh
weight, dry weight and anthocyanin contents in all cultivars. Moreover, the heading stage had higher anthocyanin content than other stages. The No. 51 had the highest level of anthocyanin content 0.96 mg/g FW. However, the anthocyanin was reduced 60% under low light intensity. The data from this study indicated that the low light intensity limited growth and anthocyanin accumulation in the leaves of black glutinous rice
Reducing of severity of bacterial leaf blight disease of rice by integrated disease management in irrigated area of the lower north
No full textBacterial leaf blight disease (BB) of rice caused by Xanthomonas oryzae pv. oryzae (ex
Ishiyama) (Xoo). In 2007 found severe outbreak in central region and lower north region of Thailand in Phitsanulok 2 and Chai Nat 1 variety. The farmers’s yield has been damaged. Integrated disease management (IDM) by applied the cultural practices combined with bactericide to reduce the disease severity in paddy field, that cultivated non-resistant variety to BB. To maintain yield meet potential of rice varieties or reduce damage to a minimum. In wet season 2010, research in paddy field of Chai
Nat rice research center by broadcasting Chai Nat 1 variety. Results showed that, applied the rate of seed and fertilizer according to the advice of Rice Department (RD) combined with sprayed bacbicure 25%WP (Canoron®) 30g/20 liter water, could reduce the disease severity at 14 35 and 41 DAI Xoo. 1.5-4%, 12-16% and 6-10% respectively. Bacbicure could reduce the disease severity in the flag leaf and first leaf below the flag leaf. If this leaf area were much destroyed would affect the photosynthesis, the percentage of filled grains decreased, lightweight seeds and low yield. Applied RD’s practice combined with sprayed bacbicure to increase the number of panicle/m2 and the percentage of filled grain better than all treatments. Disease severity increase when using high urea and broadcast rice seed overcrowded. In wet season 2011, research in farmer’s field, Sukhothai Phitsanulok and Uttaradit province by broadcasting Phitsanulok 2 variety. IDM by applied the rate of seed and fertilizer according to the advice of RD, split using the urea combined with survey the disease regularly and sprayed bacbicure when found the disease early, could reduce the disease severity in flowering stage 10–28%. In severe epidemics area percentage of filled grain better than farmer’s practice 1.57–23.37%
Effect of cultivar and freezing on quality of cooked rice
No full textThis study investigated the effect of freezing on quality of cooked rice. Four rice cultivars: Khao Dawk Mali 105 (KDML 105), Pathum Thani 1 (PT 1), Khao Tah Haeng (KTH) and Leung 11 (L11) were used in this study. After cooking and freezing, the frozen cooked rice was freeze-thawed up to 3 cycles. For the textural properties and sensory evaluation, the results showed that the unfrozen and freeze-thawed cooked rice from KDML 105 had the lowest hardness and the highest stickiness whereas rice from L11 had the highest hardness and the lowest stickiness. In addition, the freeze-thaw cooked rice had a tendency to increase hardness and decrease stickiness with subsequent freeze-thaw cycles. From a scanning electron micrograph, the surface of the unfrozen cooked rice from KDML 105 and PT 1 exhibited a smooth surface more than the other cultivars; however, after repeated freezethaw cycles the surface of the cooked rice became rough, in particular KTH and L11 cultivars. These
results indicated that the cultivar of rice grains influenced the quality of frozen cooked rice. The knowledge from this study can be useful for improving the quality of frozen cooked rice
Production of golden brown rice from broken milled rice fermented by yellow pigments producing molds
No full textNeeds for extension services of sugarcane growers in northeastern region
No full textThis research aims at identifying needs for agricultural extension services of sugarcane growers in the Northeastern region. The data were collected from 494 sugarcane growers in 2009/2010. It was found that knowledge on white leaf disease control, selection of sugarcane cultivars and soil improvement were highly needed. The highly needed extension technology methods was study tour at successful sugarcane farm. The highly needed support included price assurance, arrangement on sugarcane stalk procurement and arrangement on fertilizers and chemicals procurement. The sugarcane growers with shorter period of being membership needed knowledge on sugarcane production to greater extension than there with longer period of being membership.การศึกษานี้มีวัตถุประสงค์เพื่อศึกษาความต้องการบริการส่งเสริมการเกษตรของเกษตรกรชาวไร่อ้อยในภาคตะวันออกเฉียงเหนือ โดยเก็บรวบรวมข้อมูลจากกลุ่มตัวอย่างที่เป็นชาวไร่อ้อย ในปีการผลิต 2552/53 จำนวน 494 ราย พบว่า เกษตรกรชาวไร่อ้อยมีความต้องการความรู้เกี่ยวกับการผลิตอ้อยในระดับมากในเรื่อง การป้องกันกำจัดโรคใบขาวการเลือกพันธุ์อ้อย และการปรับปรุงบำรุงดิน วิธีการถ่ายทอดของเจ้าหน้าที่ส่งเสริมที่เกษตรกรต้องการในระดับมาก ได้แก่ การศึกษาดูงานในไร่เกษตรกรที่ประสบความสำเร็จ และต้องการบริการและสนับสนุนระดับมากในเรื่อง การประกันราคาอ้อย การติดต่อแหล่งพันธุ์อ้อย และการจัดหาแหล่งปุ๋ยเคมีและสารเคมีราคาถูก ชาวไร่อ้อยที่มีระยะเวลาการเป็นสมาชิกผู้ปลูกอ้อยน้อยกว่ามีความต้องการความรู้ในเรื่องการปลูกอ้อยมากกว่าชาวไร่อ้อยที่มีระยะเวลาการเป็นสมาชิกผู้ปลูกอ้อยนา
Improving dehusking efficiency of jasmine rice
No full textDehusking is an important process in rice processing, however its main problem is kernels brokenness. Consequently, this study is aimed to improve dehusking efficiency of jasmine rice by decreasing percentage of broken kernels. It was found that surface lathering, temperature control and controlling of dehusking rate can reduce the brokening of kernel more than 1%
