Effects of Different Altitudes on Growth and Culm-swelling of Zizania caduciflora（Turcz.）Hand. -Mazz.
DENG Jian-ping1，SHI Min2，HUANG Jian-zhong2*，GUO De-ping3，HU Zhen-liang4
1Dayang Town Agricultural Technology Extension Station of Jinyun County， Jinyun 321412， Zhejiang， China；2Institute of Nuclear-Agricultural Sciences， Zhejiang University， Hangzhou 310029， Zhejiang， China； 3College of Agriculture and Biotechnology， Zhejiang University， Hangzhou 310058， Zhejiang， China； 4Meteorology Bureau of Jinyun County， Jinyun 321400， Zhejiang， China
摘要 对在海拔高度200～1 000 m 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：410 m ＞ 650 m ＞ 1 008 m ＞ 815 m。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。
Abstract：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 sprouting 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 temperature 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．Suppression 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.
邓建平, 石敏, 黄建中, 郭得平, 胡振亮. 不同海拔高度对茭白生长及孕茭的影响[J]. 中国蔬菜, 2013, 1(12): 88-93.
DENG Jian-Ping, SHI Min, HUANG Jian-Zhong, GUO De-Ping, HU Zhen-Liang. Effects of Different Altitudes on Growth and Culm-swelling of Zizania caduciflora（Turcz.）Hand. -Mazz.. , 2013, 1(12): 88-93.
