http://anchan.lib.ku.ac.th/agnet The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Search the Channel search http://anchan.lib.ku.ac.th/agnet/simple-search http://anchan.lib.ku.ac.th/agnet/handle/001/5337 Title: ความต้องการน้ำและค่าสัมประสิทธิ์การใช้น้ำของอ้อยพันธุ์ขอนแก่น 3; Water requirement and Kc values of Khon Kaen 3 sugarcane variety<br/><br/>Authors: Kobkiet Paisancharoen; Taksina Sansayawichai; Suphakarn Luanmanee; Srisuda Thippayarugs; Kasem Chusorn; Jindarut Chuenrung; Chayant Pakdeethai<br/><br/>Abstract: Water requirement for plant cane and ratoon cane of Khon Kaen 3 sugarcane variety was studied on Fine-loamy, siliceous Typic Kandiustults namely Warin soil series at Khon Kaen Field Crops Research Center (KKFCRC) since November, 2009 to December, 2011. Plot experimental design was RCB with 3 replications and 6 treatments, consisted of 1) No water (rain-fed condition as control) 2) Supplemental water by drip irrigation as 12.5% of available water capacity (AWC) level from 30-240 DAP 3) Supplemental water as 25.0% of AWC 4) Supplemental water as 37.5% of AWC 5) Supplemental water as 50.0% of AWC and 6) Bare soil. Weekly crop water uptakes for sugarcane and soil evaporation were recorded from the plots of 9x9 m and the crop coefficient (Kc) was re-derived. Reference crop evapotranspiration (ETo) was also determined using Blaney-Criddle (FAO) method from daily weather data gathered from the KKFCRC agro-meteorological station with 0.3 km nearby the experiment. The total plant cane water consumption was 1,620 mm/crop and the average of maximum yield was obtained 35.0 t/rai at the 37.5% AWC treatment. Water use efficiency (WUE) was 74.1 cu.m/t. The locally determined Kc values were 0.34, 0.74, 1.52, and 0.83 for initial, tillering or development, grand or mid and mature (late) sugarcane growth stages, respectively. Forthe total ratoon cane consumption, was 1,703 mm/crop and the average of maximum yield was obtained 131.9 t/ha at the 25.0% AWC treatment. Water use efficiency (WUE) was 129.3 cu m/t. The locally determined Kc values were 0.69, 0.39, 0.84, 2.28, and 0.75 for initial, seedling adaptation, tillering or development, grand or mid and mature (late) sugarcane growth stages, respectively. Sun, 01 Jan 2012 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/5336 Title: ผลของการใช้อาหารผสมสำเร็จที่ใช้ทางใบปาล์มน้ำมันหมัก เป็นแหล่งอาหารหยาบร่วมกับการเสริมเอนไซม์ย่อยเยื่อใยต่อสมรรถภาพการเจริญเติบโต และลักษณะซากแพะ; Effect of total mixed ration containing oil palm frond silage as a source of roughage mixed with fibrolytic enzyme on growth performance and carcass characteristics of goat<br/><br/>Authors: Chaiyawan Wattanachant; Wanwisa Ngampongsai<br/><br/>Abstract: This study aimed to determine the effects of total mixed ration (TMR) containing oil palm frond silage (OPFS) as a source of roughage mixed with fibrolytic enzyme on feed intake, growth performance and carcass characteristics of goats. Sixteen male Bore x Thai native goats, 10-12 months old with average live weight 13.37±1.40 kg, were used in this study. Goats were allotted according to completely randomized design to receive TMR diet containing OPFS (roughage) to concentrate ratio at 60:40 (on a DM basis) and mixed with fibrolytic enzyme at 0 (control) (T1), 2 (T2), 4 (T3) and 6 (T4) g/kg DM of TMR. All diets were fed ad libitum to goats for 90 days. From the results, goats received non-supplemented (T1) and supplemented with fibrolytic enzyme (T2 to T4) had similar dry matter feed intake (P>0.05) with a range of 440.39-465.16 g/day. In addition, there were no significant differences (P>0.05) among treatments regarding final live weight (17.08-18.45 kg) and average daily gain (41.11-57.78 grams/day). After slaughter, fibrolytic enzymes supplementation had no significant effects on carcass weight, dressing percentage, meat percentage, fat percentage and bone percentage (P>0.05). Sun, 01 Jan 2012 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/5335 Title: Sulfate fertilizer influencing methane emissions in paddy field and rice (cv. Chainat 1) production<br/><br/>Authors: Patcharee Saenjan; Natthakittiya Paiboon; Jamnong Tragoolram<br/><br/>Abstract: Methane (CH4) is one of the most important greenhouse gases having a significant impact upon global warming. Today, paddy fields are a major source of methane production. The objective of our experiment is to investigate whether sulfate fertilizer can reduce the amount of methane emissions from the paddy field into the atmosphere, while maintain or increase fertility of the paddy soil, and the rice production of Chainat1. The experimental plan was structured using the Randomized Complete Block Design (RCBD), consisting of four treatments: 1) Incorporation of rice stubble without the usage of sulfate fertilizer, 2) Incorporation of rice stubble using sulfate fertilizer, 18 kg SO4/rai, 3) Incorporation of rice stubble using sulfate fertilizer, 32 kg SO4/rai, and 4) Incorporation of rice stubble using sulfate fertilizer, 48 kg SO4/rai. Sulfate was used in the form of fertilizer 16-20-0 (42% SO4). Results showed that there was no significant effect of sulfate on the physical and chemical properties of soil after harvest. The sulfate, at the rates of 18, 32 and 48 kg SO4/rai, insignificantly reduced the amount of methane emissions and released 19.3, 14.2, and 11.6 kg CH4/rai. Moreover, sulfate also reduced the quantity of Global Warming Potential (GWP) in decreasing order of 443.9, 326.6, 266.8 kg/rai, respectively; though comparatively insignificant. Additionally, the application of sulfate fertilizer increased rice production two-and-a-half times (1001 to 1094 kg/rai) that of the control without sulfate fertilizer (476 kg/rai). We have concluded that the application of sulfate fertilizer boosts rice yield, but could not mitigate methane emission or GWP in fine textured paddy soil Sun, 01 Jan 2012 00:00:00 GMT http://anchan.lib.ku.ac.th/agnet/handle/001/5334 Title: การประเมินประชากรลูกผสมชั่วที่ 5 ระหว่างข้าวปลูก(Oryza sativa L.) และข้าวป่าสามัญ(Oryza rufipogon Griff) ในลักษณะดอกที่เอื้อต่อการผสมข้าม; Evaluation F5 progenies of a cross between cultivated rice (Oryza sativa L.) and common wild rice(Oryza rufipogon Griff) for outcross promoting traits<br/><br/>Authors: Sarun Khumto; Benjawan Rerkasem; Sansanee Jamjod<br/><br/>Abstract: Cultivated rice (Oryza sativa L.) is self-pollinating, with flowering traits that exclude crosspollination. Hybrid rice seed production is therefore limited by low outcrossing rate between parental lines. To improve outcrossing ability in cultivated rice, common wild rice (O. rufipogon Griff.) was used as a source for outcrossing traits and backcrossed to Suphanburi 1 (SPR1) cultivated rice (BC2). In this study, F5 progenies of the backcross (BC2F5) were grown and evaluated for flowering traits in comparison with SPR1 parent. At flowering, florets were collected to measure the length of anthersand pistil. The anthers of SPR1 averaged 2.32 mm and pistil 1.50 mm, in length. The F5 population ranged 2.40 to 3.93 mm in anther length (3% to 170% of SPR1) and 1.80 to 3.40 mm in pistil length (20% to 127% of SPR1). The results showed that it is possible to improve floral traits to facilitate outcrossing in rice. Pistil length responded to selection than the length of anthers. Lines with high yielding, large anther and large stigma were selected, to be evaluate in the next generation, and ultimately to be deployed in breeding programs and hybrid seed production. Sat, 01 Dec 2012 00:00:00 GMT