作　　者： ; ;

机构地区： 中国农业大学资源与环境学院

出　　处： 《中国农业科学》 2001年第4期403-409,共7页

摘　　要： 以冬小麦为材料 ,研究了土壤水分变动条件下作物的生长动态。结果表明 ,水分胁迫使作物的最大生长阶段开始时间提前 ,最大生长阶段延长 ,最大生长率和最大生长阶段内的平均生长率减小 ,因而使干物质积累速度降低 ,生长变慢。复水使最大生长阶段开始时间推后 ,最大生长阶段缩短 ,最大生长率和最大生长阶段内的平均生长率增大 ,因而使干物质积累速度提高 ,生长加快。中度水分亏缺后于拔节期复水的处理 ,可以使生长显著加快 ,干物质积累速度显著提高 。 Glasshouse and laboratory tests were carried out in 1996～1998 using winter wheat cultivars Beinong 6 as materials. The growth dynamics of the whole wheat plant were analysed under constant and fluctuated soil water condition. The results showed that water stress made the starting time of crop greatest growt[WT10.5,10.25BZ]h phase in advance, prolonged greatest growth phase, decreased the greatest growth rate,and as a result, the rate of dry matter accumulation was reduced and crop growth slowed down. Rewatering de layed the starting time of crop greatest growth phase, shortened greatest growth phase, increased the greatest growth rate, thus, the rate of dry matter accumulation had been boosted and crop growth quickened. Growth rate, dry matter weight and grains yield of wheat were almost equal to the well watered controls if they were rewatered in the condition of moderate water stress during the jointing stage.

关 键 词： 冬小麦 土壤水分 生态动态 复水 生长速率 生长时间

领　　域： [农业科学]