中文摘要：

对在海拔高度200～1000m地区栽培的单季茭的生长和孕茭特性进行研究。结果表明:高海拔地区栽培的茭白萌芽期、出叶和株高增速峰值均比低海拔处明显延迟。高海拔处茭白萌芽较低海拔处需要更多5℃以上的有效积温;各海拔处茭白出叶速率和株高增速与有效积温间呈正相关。各海拔高度孕茭先后顺序为:410m】650m】1008m】815m。各海拔处茭白的孕茭期均发生在气温适宜孕茭的时间段内。因此,海拔高度对茭白生长和孕茭的影响主要是通过不同海拔高度的温度差异来实现的,高温抑制茭白黑粉菌的正常生长及代谢可能是茭白夏季高温条件下难以孕茭的重要原因。

英文摘要：

@@@@The present study investigates the effects of high altitudes (200-1 000 m) on the growth and culm-swelling of Zizania caduciflora(Turcz.)Hand. -Mazz..The results showed that the sprout-ing date,leafing and peak value of plant height increase at high altitudes were significantly delayed and lower than those grown at lower altitudes.Sprouting of Zizania caduciflora(Turcz.)Hand. -Mazz. in high altitudes requires over 5 °C effective accumulated temperature than in low altitudes. Its leafing rate, plant height increasing speed showed positive correlation with the effective accumulated temperature in various altitudes.Culm-swelling was observed to take place in the following order:410 m> 650 m> 1 008 m > 815 m.The culm-swelling stage usually occurred during the period,when the tempera-ture was suitable.Therefore,the effect of altitude on growth and culm-swelling of Zizania caduciflora (Turcz.)Hand.-Mazz. was mainly realized by temperature differences at different altitudes.Suppres-sion of growth and metabolism of Ustilago esculenta by high temperature is most likely to be the limiting factor for culm-swelling of Zizania caduciflora(Turcz.)Hand. -Mazz. during hot summer days.