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应用热脉冲技术对核桃树干液流进行了测定,探讨了核桃液流的日变化、月变化规律和水分的供求关系。结果表明:核桃树干液流速率存在明显的昼夜变化规律,呈单峰形曲线;典型晴天耗水大小顺序为8月>7月>5月>6月>9月>4月>10月,月总耗水大小顺序为5月>8月>6月>7月>9月>4月>10月;6~9月份降雨量与耗水量比>1,水分供大于求;4、5、10月份降雨量与耗水量比<1,水分供不应求,不利于土壤水分积累;大气温度、辐射强度与液流速率极显著正相关,相对湿度与液流速率呈极显著负相关。
The heat pulse technique was used to determine the flow of walnut tree stem, and the diurnal variation, monthly variation and supply and demand of walnut flow were discussed. The results showed that there was a significant diurnal variation in the flow rate of the trunk of the walnut, showing a single peaked curve. The order of the typical sunny day was August> July> May> June> September> April> October, Total water consumption in the order of May> August> June> July> September> April> October; June-September rainfall and water consumption ratio> 1, water supply exceeds demand; 4,5,10 The ratio of rainfall to water consumption was less than 1 in 1 month, and the demand of water was in short supply, which was not conducive to the accumulation of soil moisture. The atmospheric temperature and radiation intensity were significantly and positively correlated with the flow rate, and the relative humidity was extremely significantly negatively correlated with the flow rate.