Characteristics and cultivation methods of rice [Oryza sativa] cv. 'Chiba 28' ('Fusakogane')
2007
Shinoda, M.(Chiba-ken. Agriculture Research Center (Japan)) | Koyama, Y.
We analyzed the cultivation characteristics of rice cv. 'Chiba 28' with respect to general cultivation beginning in 2006. We also established a growth-control method for stable production with good grain quality and excellent eating quality and ranked these with a fundamental technique from the cultivation manual. 1. As we considered the characteristics of rice cv. Chiba 28, we determined that the recommended target of the brown rice yield should be 6.0 to 6.5ton/ha based on the percentage of ripened grains being over 85%, the thousand grain weight being over 22.5g, the percentage of brown rice protein being under 8.0% and there being no lodging. The target number of grains corresponding to that yield was 31,000 to 35,000 per square m. 2. The target ear density was 400 to 450 per square m to achieve the target number of grains. The target culm length was under 80cm to avoid lodging. 3. To obtain the target number of ears, grains and culm length, the target number of stems was 450 to 550 per square m, target stem length was 60 to 65cm, and 'the number of stems X the leaf color value' was 18,000 to 22,000 in the panicle formation stage. 4. The necessary basal dressing of nitrogen fertilizer for rice cv. Chiba 28 was 40 to 50kg/ha in gley paddy loam, which was 10 to 20kg/ha more than rice cv. 'Fusaotome'. 5. Seedlings should be transplanted from the fourth to the sixth pentad of April to avoid lodging and deterioration of grain quality. The planting density to obtain the target number of stems and ears was 18.5 hills per square m, and seedlings were planted three to five per hill.
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