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以东农428和龙稻5号为试验材料,对不同栽培模式下东北粳稻光合物质生产特征进行研究。结果表明,适宜垄距下采用高光效栽培模式,水稻的干物质积累、运转及叶面积、光合势等物质生产和光合生产特征明显优于其他栽培模式,其成熟期群体干物质量和产量比常规栽培分别高1.75~2.51 t/hm~2和2.66~3.78 kg/30 m~2。同为高光效栽培模式,(20+40)cm×15 cm的垄距处理其成熟期群体干物质量和产量明显高于(20+50)cm×15 cm的垄距处理,分别高2.00~2.67 t/hm~2和2.91~4.95 kg/30 m~2,说明行距超出适宜范围其群体干物质积累反而下降,不利于水稻高产群体的形成。
Dongnong 428 and Longdao 5 were used as experimental materials to study the photosynthetic characteristics of northeastern japonica rice in different cultivation modes. The results showed that the high light-efficiency cultivation mode was adopted under appropriate ridge spacing. The characteristics of dry matter accumulation, operation, leaf area, photosynthetic potential and other photosynthetic characteristics of rice were obviously better than those of other cultivation modes. The dry matter weight and yield Cultivation were 1.75 ~ 2.51 t / hm ~ 2 and 2.66 ~ 3.78 kg / 30 m ~ 2 respectively. In the same high light-efficiency cultivation model, the dry matter yield and yield of the mature plants with (20 + 40) cm × 15 cm were significantly higher than that of the (20 + 50) cm × 15 cm ridge with height of 2.00 ~ 2.67 t / hm ~ 2 and 2.91 ~ 4.95 kg / 30 m ~ 2, indicating that the row spacing is more than the appropriate range of population dry matter accumulation instead of decline, is not conducive to the formation of high-yielding population of rice.