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我国南方稻区的主要低产稻田是潜育性稻田,约有一亿亩。挖掘其“潜在生产力”,种植耐潜育性土壤逆境胁迫能力较强的水稻品种,则是简便、经济而有效的重要途径之一。本文就几个早籼稻品种(组合)对潜育性稻田的生态适应性进行了较系统的观测,并初步提出了耐潜育性的几个鉴定指标,诸如根系生长量和幼穗分化期根系氧化力;分蘖早期茎蘖增长速率;分蘖后期单株干物质产量;乳熟期剑叶片过氧化氢酶活性GDI和光合强度等。上述鉴定指标,综合应用于水稻品种生态适应性和耐潜育性育种研究,有助于提高水稻抗逆性育种的效率。
The main low-yield rice fields in southern China’s rice area are glenelrable rice fields, accounting for about 100 million mu. Excavating its “potential productivity” and planting rice varieties with strong resistance to abiotic stresses and soil abiotic stresses are one of the most convenient, economical and effective ways. In this paper, several indica rice varieties (combinations) on the ecological adaptability of groping paddy fields were more systematically observed, and initially proposed several indicators of resistance to potential fertility, such as root growth and panicle differentiation root system Oxidative stress, early tillering growth rate of tillering, dry matter yield per plant at late tillering stage, catalase activity GDI and photosynthetic rate in flag leaf during milking stage. The above-mentioned identification indexes are comprehensively applied to ecological adaptability and resistance breeding of rice varieties, and are helpful to improve the efficiency of resistance breeding in rice.