【摘要】 <正> 在我国北方水源不足的条件下,大面积发展水稻生产受到了很大限制,因此采用抗旱品种,节水种稻,越来越为广大农业科学工作者所重视。近年来,菲律宾国际水稻研究中心开展了水稻抗旱鉴定工作,他们利用苗期反复干旱法评价水稻品种的抗旱性。日本研究了水稻根系与品种抗旱性的关系,并提出用弹簧秤测定根系拉力法评价水稻的抗旱级别。我国在水稻栽培上有一整套节约用水和经济用水的管理措施,由淹水栽培改湿润栽培,可节约用水2/3。如果利用夏秋天然雨水发展雨季稻,能获得与小麦相同的产量,只比小麦多浇2～3水,当然这种湿润栽培法必须有相应的抗旱品种来保证。更多还原

【Abstract】 Electric conductivity, respiratory intensity, growth rate of leaf, proline, water content of the leaf 24 hours after excision, surrival rate and stomatic resistance were determined after drought stress of rice seedlings. The purpose of these determinations is to evaluate the drought resistance and to select drought-resistant varieties adaptable to watersaving culture. Among the above 7 physiological indices, the electric conductivity, survival rate, stomatic resistance and water content of the leaf 24 hours after excision were found to have close relationship with the drought resis tance of rice seedlings.更多还原