【摘要】 1999年在安徽农业大学试验农场进行了水稻露地和覆膜旱作条件下根系生长发育特性的研究。研究结果表明 :水稻在旱作条件下根系干物质在生育后期仍有较高的累积率 ;根系活力在生育期内呈单峰曲线变化 ,其中以拔节长穗期为最高 ,且根系活力大小表现为 :露地 >覆膜 ;根系吸收总面积和活跃吸收面积在拔节长穗期前同步增长 ,然后逐渐减小 ;根系呼吸强度大小则表现为 :覆膜 >露地更多还原

【Abstract】 The growth and development of root system of paddy rice and upland rice were studied in the experiment farm of Anhui Agriculture University in 1999. The results showed that: the weight of dry rice roots under upland cultivation was highly accumulated in the later growth period,and during the growth process the changes of root activity appeared with one-peak curve, with the maximum value at the jointing stage. And also, it showed that the root activity without coveredby plastic film was greater than that with covered. The total area and active absorption area of root system were increased before jointing stage,then decreased;The respiratory intensity of the root system covered with plastic film was greater than that without covered更多还原