신동진벼 안전재배 기술

The Sindongjin variety is a mid-to-late maturing variety with a heading date of August 14. When transplanted on May 30, the heading date is August 14; conversely, when transplanted on June 25, it is August 28, and in the Yeongnam region, when transplanted late on July 1, it is August 27. The rice yield is 596 kg/10a, and it is a medium-large grain variety with a brown rice 1,000-grain weight of 27.7 g, classified as a small-striped, medium-weight variety. There are 12 rice plants per cluster, with 96 grains and a ripening rate of 94%. When cultivating this rice, care must be taken to ensure proper balanced fertilization, as excessive nitrogen fertilizer can lead to lodging and a decline in grain quality. Additionally, since the brown rice 1,000-grain weight is 27 g, the seeding rate in mechanical transplanting boxes should be 10% higher than that of the Dongjin variety. When mechanically transplanting young seedlings, seedlings must be grown for 2 to 3 days longer than other varieties because mat formation is poor. The total seedling period should be 14 to 15 days. Additionally, since this variety is not resistant to lodging, it should be avoided in flooded direct sowing. The rice has low hardness, which may lead to a lower milling yield. As the rate of pre-harvest sprouting is similar to that of Dongjinbyeo, attention must be paid to timely harvesting and drying. In particular, it is susceptible to rice blast and vulnerable to the new K3a race of bacterial leaf blight, so timely basic pest control must be strictly implemented. It is also particularly vulnerable to the rice stem borer when double cropping. While the damage rate from the second generation of rice stem borers for other varieties is 2–4%, Sindongjinbyeo shows a high damage rate of 12%; therefore, preventive pest control must be prioritized. Due to its short paddy field growing season, it is highly adaptable to double cropping. For transplanting on May 10, mid-season drainage should be performed 36 days after transplanting; for transplanting on May 30, 30 days after transplanting; and for transplanting on June 20, 24 days after transplanting. Since it is susceptible to lodging, applying topdressing fertilizer around 15 days before heading can mitigate lodging and ensure safe cultivation. It is particularly vulnerable to bacterial leaf blight; therefore, water from waterways should not be used for control, but rather clean water such as groundwater should be used. Additionally, it is necessary to transplant a variety resistant to bacterial leaf blight K3a. Recently, the cultivation area of ​​Chamdongjinbyeo, a variety resistant to bacterial leaf blight, has been expanding. We provide information on cultivation methods and control measures for lodging and pests (rice blast, bacterial leaf blight, rice stem borer), which are issues with the Shindongjin variety preferred by consumers, thereby providing information to enable stable cultivation.