유해영

Protected semi-irrigated-seedbed ○ Constructing seedbed -About 1.2m wide to facilitate seedbed management -Raising seedbed 4-5cm above the original soil level -Making tunnel with bamboo sticks & plastic film on the bed ○ Sowing rice seeds -Pregerminating seeds -Rate of seeding, 100g per m² of seedbed -Broadcasting seeds on seedbed -Sowing seeds 30-40 days before transplantin -50kg seeds p..

Wet-Bed Method for Raising Seedlings ○ Constructing seedbed -About 1-1.5m wide to facilitate seedbed management -Raising seedbed 4-5cm above the original soil level ○ Sowing rice seeds -Pregerminating seeds -Rate of seeding, 100g per m² of seedbed -Broadcasting seeds on seedbed -Sowing seeds 20-40 days before transplanting -50kg seeds per hectare ○ Irrigating the seedbed 2-5 cm deep -Co..

Raising seedlings ○ Wet-bed ○ Dry-bed ○ Dapog ○ Protected semi-irrigated-bed ○ Semi-adult seedling for machine transplanting ○ Infant seedling for machine transplanting Practice of seed selection Rice seed selection practices are sieve, wind, specific gravity selection. The practice in combination of wind selection and specific gravity selection is most e..

Rice yield in tropical regions & temperate regions ○ Respiratory losses ○ Net dry matter production as a balance between photo. & resp. Y = S 〔 1.20 - 0.021 ( t - 21.5 )² 〕 Y : grain yield ( kg / 1000 m² ) S : solar radiation ( cal/cm² per day ) t : daily mean temperature(℃) in August and September Y = 500〔 1.20 - 0.021 ( 21.5- 21.5 )² 〕=584.5 kg/1000m²(100%) temperate Y..

Paddy Field Preparation ● Weed control ● Mixing the soil to bring up leached deposits ● Reducing water losses ● Easy transplanting The preparation consists of several phases ○ Land soaking ○ Plowing ○ Harrowing ○ Puddling ○ Leveling ○ Repairing levees Transplanting starts at the end of the preparations

Classification of rice culture ○ According to field position, water source, water regime - Rainfed / Irrigated - Upland / Lowland - Upland with no standing water - Lowland with 5-50 cm of standing water - Deepwater with 〉51 cm to 5-6m of standing water - Upland rice, with plants of medium to tall height - Lowland rice, with plants of semidwarf to tall height - Deep water rice, with plants o..

Environmental conditions of rice-growing regions - in northeastern China At latitude 53˚N & in New South Wale, Australia at 35˚S / in central Sumatra on the equator - at elevatiovs of 2600 m, Nepal´s Himalaya / at sea level coatal plains throughout Asia - the rice season averages 33˚C in Pakistan / 17˚C in Japan - an average of more than 5100mm of rainfall in Myanmar / less than 100 m..

Rice area (1000ha) for 25 leading producers in order of decreasing rice production in 1994 in 2000 China 30,373 30,503 World rice production : 645 mt India 42,034 44,600 Indonesia 10,646 11,523 Bangladesh 9,850 10,700 Vietnam 6,500 7,655 Myanmar 6,477 6,000 Thailand 8,482 10,048 Japan 2,212 1,770 Brazil 4,446 3,672 Philippines 3,350 4,037 United Ststes 1,336 1,232 Korea Rep 1,160 1,072 Pakistan..

COMMON ANCESTOR in GONDWANALAND Oryza Sativa Oryza Glaberrima Indica Japonica Javanica

본 불로그에 있는 자료를 강의 자료로 활용하기를 원할 경우 본인의 양해 얻기를 희망함 Rice Production Dr. Ryu, Hae-Yeong