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Characteristics and traits of the Songjing 4 japonica rice variety

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Bred by the Second Rice Research Institute of the Heilongjiang Academy of Agricultural Sciences. In the 1997-1998 regional trial, the average yield was 8677.3 kg/hm2, an average increase of 16.5% over the control Dongnong 416; in the 1999 production trial, the average yield was 7339.4 kg/hm2, an average increase of 8.7% over the control Dongnong 415. Growth duration is 135 days, requiring an active accumulated temperature of 2500-2600 degC. Plant height is 95-100 cm, panicle length is 16 cm, 110 grains per panicle, 1000-grain weight 26 g. Tillering ability is above average, tolerant to fertilizer and resistant to lodging, tolerant to low

Bred by the Second Rice Research Institute of the Heilongjiang Academy of Agricultural Sciences. In the 1997-1998 regional trial, the average yield was 8677.3 kg/hm2, an average increase of 16.5% over the control Dongnong 416; in the 1999 production trial, the average yield was 7339.4 kg/hm2, an average increase of 8.7% over the control Dongnong 415. Growth duration is 135 days, requiring an active accumulated temperature of 2500-2600 degC. Plant height is 95-100 cm, panicle length is 16 cm, 110 grains per panicle, 1000-grain weight 26 g. Tillering ability is above average, tolerant to fertilizer and resistant to lodging, tolerant to low temperature, tolerant to salinity and alkalinity. In 1999, artificial inoculation showed seedling blast grade 6, leaf blast grade 4, and neck blast grade 3; natural infection showed seedling blast grade 4, leaf blast grade 3, and neck blast grade 3.

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