【摘要】 据1985～1986年实验,适合华北地区麦收后栽培的水、陆稻特早熟品种中,陆稻比较适应干旱地,旱种时性状负向反应的程度较小。水稻旱种时的适应性变化主要表现为:①延长水分敏感期(即营养生长与生殖生长并进期);②削弱非生产性的营养器官,包括分蘖;③削弱通气组织,增加输导和贮藏组织。更多还原

【Abstract】 The eco-physiological adaptability of rice (Oryza sativa L.)to paddy and upland were studied with three varieties of lowland and upland rice under paddy and upland in 1985～1986. The reason for upland rice variety being adapted to upland was that they reacted slowly to the change in ecological conditions and expressed less negative varieties than lowland rice varieties.The eeo-adaptability of lowland rice varieties to upland were that:1) in growth and development to prolong the sensitive period to water stress (from panicle differentiation to seed filling), 2) in morphological characteristics,to decrease tillers,3) in anatomical struc- ture,to weaker ventilating tissue,but to strenghen transporting and storing to issues.更多还原