摘要
通过田间试验,利用SF-G液流传感器研究滴灌核桃树茎流速率变化规律及其与气象因子间的关系。结果表明:茎流速率的日变化在16∶00左右达到峰值;全生育期中,茎流速率先变大后减小,最大茎流速率出现在核桃油脂转化期;晴天条件下茎流速率日变化呈单峰曲线,先增后减,多云天气条件下茎流速率的日变化呈多峰曲线;核桃树茎流速率与太阳辐射和大气温度具有较好的正相关关系,与大气相对湿度呈负相关;建立滴灌核桃树茎流速率与气象因子之间的回归方程。
Through the field experiment, SF - G flow sensor was used to study the change rule of sap flow rate of walnut trees, and the relationship between meteorological factors and sap flow rate under drip irrigation. The results showed that the diurnal variation of sap flow rate peaked at about 16：00; the stem flow rate increased at first, and then decreased in the whole growth period; the maximum sap flow rate appeared in oil growth period; under sunny conditions, the curve of stem-flux showed a single peak, first increased and then decreased; under cloudy conditions, the diurnal variation of stem flow rate showed a multi-peak curve; the stem flow rate of walnut trees had a good positive correlation with the solar radiation and air temperature, and had a negative correlation with relative humidity. In the end, the regression model between stem-flux of walnut trees and meteorological factors under drip irrigation was built up.
出处
《节水灌溉》
北大核心
2015年第7期14-16,20,共4页
Water Saving Irrigation
基金
新疆维吾尔自治区重大专项项目(201130103-1)
国家科技支撑计划项目(2011Bad29B05)
新疆水利科技项目(2013G03)
新疆水利水电工程重点学科基金项目(XJZDXK-2002-10-05)
关键词
茎流速率
核桃树
气象因子
滴灌
stem flow rate
walnut trees
meteorological factors
drip irrigation
