摘要
以衡水冀州区北漳淮乡林场的栾树(Koelreuteria paniculata Laxm.)为研究对象,采用热扩散式探针(TDP)测定栾树在不同季节1d内不同时间的耗水量,分析栾树耗水变化在不同生长季节下的日变化规律。结果表明:在春季4-6月栾树的开枝散叶的重要时期,其耗水量逐月递增,春季的平均耗水量约为1.39 mm/d,在夏季7-9月栾树的旺盛生长季内,耗水量相比春季在1 d内耗水量波动较小,夏季的平均日耗水量为1.41 mm/d,到了10-11月份,栾树的生长放缓并为越冬做准备,耗水量有所降低,11月耗水量最低,且波动较小10月份的平均日耗水量在1.38 mm/d左右,11月份日平均耗水量在1.2 mm/d左右。通过研究发现,在1 d内不同时间与不同生长季节中耗水量的差异与气候息息相关。从不同时间尺度研究解栾树耗水特征,对衡水市冀州区平原立地条件下调整种植结构保护地下水源具有重要意义。
This study investigated the changing pattern of the daily water consumption rate of the koelreuteria paniculate laxm at the Beizhanghuai forest farm(Jizhou District,Hebei Province,China).The thermal diffusion probe(TDP)method was adopted to measure the water consumption rate of koelreuteria paniculate laxm at different times of a day in different seasons.The results showed that the daily water consumption rate of the koelreuteria paniculate laxm had a monthly increase in spring(from April to June),as which was the important period for the growth of koelreuteria paniculate laxm.The average water consumption rate in spring was 1.39 mm/day,which was increased to 1.41 mm/day in summer.The fluctuation of the daily water consumption rate in summer was smaller than in spring.The koelreuteria paniculate laxm reduced their water consumption rate and slowed down their growth from October to November to prepare for the approaching winter.In October,the average daily water consumption rate was around 1.38 mm/day and reached the lowest value in November,which was 1.2 mm/day.The daily water consumption rate fluctuation was relatively smaller in November.This study found that the differences in water consumption at different times of the day and during different growing seasons are closely related to the climate.Studying the water consumption characteristics of koelreuteria paniculate laxm from different time scales is of great significance for adjusting the planting structure and protecting groundwater sources under cultivated land conditions in Jizhou District,Hengshui City.
作者
肖永青
刘志炜
王冰鹤
许叶
董阳
Xiao Yongqing;Liu Zhiwei;Wang Binghe;Xu Ye;Dong Yang(Forestryand Grassland Bureau of Hebeiprovince,Shijiazhuang 050081,Chian;Hebei Agricultural University,Baoding 071001,Hebie,China)
出处
《林业科技情报》
2022年第4期64-67,共4页
Forestry Science and Technology Information
关键词
栾树
热扩散探针法
耗水特征
Koelreuteria paniculata laxm
thermal diffusion probe method
water consumption characteristics
