유해영

5.5.4. No pests nor diseases Good seedlings have neither damages due to insect pests nor infection with rice diseases. For raising healthy seedlings, The seedbed area should be far from fields infected with tungro, grassy stunt, and other diseases. It should not be lighted at night to avoid attracting harmful insects. 오른쪽 그림 2개 사용, 하나는 벌레 먹고 병든 잎, 하나는 ..

5.5.3. Good roots growth Good seedlings have large number of roots that are longer and heavier. The seedlings with good root growth easily recover from transplanting better than seedlings with poor root growth. Deep flooding on the seedbed results in poor root growth because of lack of air in the soil. 물깊이 첨가

5.5.2. Short leaf sheaths The rice plant with long leaf sheaths is commonly weak. Because a long leaf sheath indicates very rapid initial elongation, resulting in the weak seedling. Cloudy days, shadows from something, dense seeding, and too deep water can result in long leaf sheaths. When they are transplanted, they recover slowly. 구름과 햇빛 첨가

5.5.1. Uniform growth Rice seedlings should be raised uniformly. Good seedlings have uniform plant height and growth. Irregular seedlings come from unevenness in quality of seeds, distribution of seeds on the seedbed, germination, land preparation of the seedbed, watering, and availability of nutrients in the soil. 뿌리첨가

5.4. Drybed method Construct seedbed without water the same way as in the wetbed method. Cover seeds sown on the seedbed with soft soil. Immediately after covering the seeds, sprinkle the seedbed with water until it is saturated to effect higher and uniform germination. Any time the soil moisture drops below 70% saturation, sprinkle the seedbed. 5.3.3. / 5.2.참조

5.3.7. Bundling the seedlings After uprooting seedlings, arrange them by holding the bunch in left hand and tapping the roots on right palm. Bundle the seedlings in convenient sizes for easy handling during transplanting. A 40 cm long soft material like abaca twine can be used for bundling of seedlings.

5.3.6. Pulling the seedlings In pulling, hold 2-3 seedlings closely to the base to avoid injury between your thumb and 4 fingers. Pull the seedlings gently at about 30 degrees from the horizontal. Wash the roots of pulled seedlings to removed the soil. Increase the water depth of seedbed to about 10 cm one day before pulling.

5.3.5. Irrigating the seedbed Begin shallow but continuous irrigation once the seeds have sprouted 2-3 cm high. Increase the water depth gradually to 5 cm as the seedlings grow taller. Shallow flooding of about 5 cm is satisfactory to control weeds and facilitate pulling of seedlings. 4-5개 베드 그리기

5.3.4. Sowing the seeds Sow uniformly the pregerminated seeds on the seedbed. Rate of seeding is about 100 g / ㎡ of seedbed. The seedlings are ready for transplanting 20-25 days after the seeds are sown. Avoid sowing seeds too closely together so that they will not grow too small. Too small seedlings are more difficult to pull and their roots are more prone to injury.

5.3.3. Constructing the seedbed Prepare seedbed plots of any convenient length, and 1.5 m wide one or two days before sowing. Collect mud around the seedbed area and raise it to about 5 cm above the original level. Prepare the seedbed plots of about 500 ㎡ to sow 50 kg of seeds for one hectare field. 기술지도4 괭이질 참조