百合生长期茎流特征及其与环境因子的关系

Characters of Sap Flow of Lilium and Its Relations with Environment Factors

以百合Oriental-Trumpet系列中的罗宾娜为实验材料,在监测环境因子的基础上,用包裹式茎流仪探头对其生长期茎流进行测定研究,明确百合生长期内的茎流和耗水量变化规律。结果表明:(1)百合158d生长期中,总茎流量为7 289.30g,平均日茎流量为46.13g,其中抽茎期、现蕾期、花期、果期和果后期的总茎流量分别为1 862.00、3 197.80、710.50、1 438.30和116.70g,日均茎流量分别为62.97、72.68、54.65、30.60和4.67g,不同生长时期百合日茎流速率有明显变化。(2)光辐射和大气温度是影响百合生长周期茎流量的主要环境因子,且光辐射、空气温度与茎流速率呈正相关,而与空气相对湿度呈负相关。(3)阴雨天茎流量和日茎流速率明显小于晴天。该研究为百合水分代谢模型的建立及现代化精准节水百合种植模式的研究奠定了理论基础,对于选择合适的百合节水栽培模式具有重要意义。

The sap flow of cultivar Oriental-Trumpet hybrids Lilium “Rohinna” studied with packaged sap flow system, basis on monitoring environment factors. The results of statistical analysis indicated that dur- ing the periods of growth of Liliurn （158 days） ,the total capacity of sap flow was 7 289.30 g,46.13 g per day. Among the periods of stooling stage, squaring stage, flowering stage, fruiting stage and post fruiting stage,sap flows were 1 862.00 g,3 197.80 g,710.50 g,1 438.30 g,116.70 g and averages were 62.97 g, 72.68 g,54.65 g,30.60 g,4.67 g, respectively. Sap flow rate was obviously different in the different peri- ods of growth of Lilium. The radiation and temperature were major factors affecting sap flow. Sap flow rate was positively correlated with radiation and temperature, negatively correlated with relatively humidity. Sap flow and Sap flow rate in rainy days and cloudy are lower than that in sunny days. This research establish the theoretical foundation of water metabolism model and water-saving cultivation of Lilium. It has impor- tant significance to adopt appropriate water-saving： cultivation model of Liliurn.