Study on the Change Characteristics of Stem Fluid Flow and Its Influencing Factors of Facilities Grape
Taking fresh facility grape in the arid area of Ningxia as the research object,needle stem flow meter and facility environment moni-tor were used to obtain the stem fluid flow of grape in the whole growth period and the air temperature and humidity,light intensity and soil tem-perature and humidity and other real-time data in the experimental area.The change characteristics of the stem fluid flow of grape with different ground diameter in different time scale and the the effects of environmental factors on the stem fluid flow were studied.The results showed that the daily change process of stem fluid flow of facility grape with different ground diameter was similar,and the fluid flow rate increased with the increase of ground diameter.The stem fluid flow of grape in sunny days started at about 06:00,the fluid flow rate reached the maximum value(0.660 kg/h)at 16:00.In the cloudy days,the maximum value was 0.409 kg/h,the peak value in rainy days was the minimum(0.272 kg/h).The liquid flow rate in summer was higher than that in autumn,reaching the peak value(0.493 kg/h)at 11:00.The highest value in autumn appeared at 16:00,being 0.354 kg/h.The highest value in winter was 0.061 kg/h,which was 12.37%and 17.23%of the maximum value in summer and autumn.The stem fluid flow in July was the maximum(260.34 kg/h),average daily fluid flow rate was 0.36 kg/h,followed by that in June,the cumulative fluid flow was 227.93 kg and the cumulative fluid flow was the minimum 43.12 kg in November.The cumulative fluid flow in the whole growth period was 1 347.82 kg,the daily fluid flow was 1.94-8.38 kg/d,the average daily fluid flow was 5.94 kg/d.The daily fluid flow in mature stage was the maximum(8.38 kg/d),followed by that in the discoloration stage(7.65 kg/d),and that in germination stage was the minimum(1.94 kg/d).The stem flow rate was significantly positively correlated with air temperature,light intensity and soil tempera-ture(P＜0.01),and it had a significant negative correlation with the air humidity(P＜0.01).The comprehensive error of the simulated stem fluid flow rate was 3.57%,the comprehensive error of the daily stem liquid flow was 4.24%.
Facility grapeStem fluid flowTranspiration water consumptionMeteorological factorsArid area of Ningxia
国家科技期刊平台
NSTL
万方数据
维普
