东北寒区日光温室葡萄液流特征及其主要环境影响因子研究  

Study on sap flow characteristics of grape and its environment influencing factors in cold regions of northeastern China

作　　者：李波[1] 郑思宇 魏新光[1] 王铁良[1] 孙君 葛东 Li Bo;Zheng Siyu;Wei Xinguang;Wang Tieliang;Sun Jun;Ge Dong(College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China)

机构地区：[1]沈阳农业大学水利学院,沈阳110866

出　　处：《农业工程学报》2019年第4期185-193,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然基金(51709174);辽宁省博士科研启动基金(20170520169);中国农科院重点实验室开放基金(FIRI2017-07-01)

摘　　要：为了探明东北冷寒区设施环境下,葡萄液流特征及其与温室内环境因子之间的响应特征,对葡萄液流速率以及环境因子进行连续监测和系统分析,结果表明:葡萄日内液流和全生育期逐日蒸腾均呈现单峰变化趋势,日内液流峰值出现在10:30-13:00之间,在液流最为旺盛的8月,其峰值达406.32g/h。葡萄全生育期日蒸腾量在8月变化相对最为剧烈,日均蒸腾量超过4 mm/d。液流速率与光合有效辐射(photosynthetically active radiation,PAR),气温、水汽压亏缺(vapor pressuredeficit,VPD)及实际水汽压均表现为显著正相关(P<0.01),与相对湿度表现为显著负相关(P<0.01)。瞬时液流速率与日蒸腾最主要的影响因子是PAR与VPD,月尺度液流最主要影响因子在PAR与蒸腾整合变量(variableof transpiration,VT)之间变化。全生育期液流最主要的影响因子是PAR与VT,但其决定系数随研究时间尺度的增加而降低。不同气象因子与液流之间存在明显的时滞效应,PAR的启动时间及停止时间均提前于液流,到达高峰时间滞后于液流,时滞时间最长为1.5 h。VPD整体滞后于液流。Transpiration of plants is a complex process, it not only affected by its own characteristics, but also affected by the surrounding environmental factors. In order to explore the characteristics of grape sap flow and its relationships with environment factors in the cold areas in northeastern China, grape sap flow rate and meteorological factors were monitored and analyzed systematically. Results showed that the daily transpiration of grape sap flow and daily transpiration in the whole growing period showed a trend of single peak changes, intraday peak values occurred between 10:30-13:00, the peak values reached 406.32 g/h at the most vigorous August. Under the clear weather condition, the flow in each month showed a clear trend of single peak change. The sap flow rates in rainy, cloudy and sunny days were 64.81, 67.42 and 127.00 g/h, respectively. Due to the difference in solar radiation, the fluid flow and fluctuation ranges of three weather conditions showed differences. The daily transpiration of grape was the most severe at August during the whole growth period, and the daily average transpiration exceeded 4 mm/d. From the mean value of transpiration for each growth period, the value reached 2.41-2.91 mm/d during the fruit ripening period and the coloring period, while the average daily transpiration decreased to 0.79 mm/d during the late growth period of grape, and the maximum daily transpiration during the growth period was 4.10 mm/d. The changes of daily grape transpiration in the whole growth period showed obvious seasonality, and overall presented a high-low-high trend. From the daily changes of the sap flow during the growth period (May-October), the monthly variation of the sap flow rate from the largest to the smallest was: August>July>September>June>May>October. The positive correlation between grape sap flow rate and PAR, VPD, VT (variable of transpiration) were significant (P<0.01), and the negative correlation between sap flow rate and RH (relative humidity)(P<0.01). The main influencing factors

关 键 词：蒸腾量 气象因子 日光温室 葡萄 液流速率 时滞效应 

分 类 号：S663.1[农业科学—果树学]