中国水利水电科学研究院学报
中國水利水電科學研究院學報
중국수이수전과학연구원학보
JOURNAL OF CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH
2014年
2期
130-137
,共8页
新疆杨%树干日液流量%气象因子%液流-株间微型蒸渗仪法%水量平衡法
新疆楊%樹榦日液流量%氣象因子%液流-株間微型蒸滲儀法%水量平衡法
신강양%수간일액류량%기상인자%액류-주간미형증삼의법%수량평형법
Populus alba var. Pyramidalis%daily sap flux%meteorological factors%combination method of Sap flow and Micro-lysimeter%water balance method
研究了甘肃石羊河流域人工种植防风固沙植物新疆杨的耗水规律，结果表明：新疆杨树干日液流量变化幅度较大，呈现明显的季节变化规律，且随发芽后天数的变化呈典型的二次抛物线型，确定系数达0.765；新疆杨树干日液流量与日平均气温、水汽压差、太阳辐射、风速等气象因子的多元线性逐步回归模型的确定系数为0.807，与日平均气温、水汽压差、太阳辐射等气象因子的偏相关系数分别为0.637、0.188和0.373，日平均气温是其最主要的影响因素；5-10月，新疆杨总蒸散量为508.26 mm，蒸发量、蒸腾量所占比率分别为37.1%和62.9%，液流-株间微型蒸渗仪法和水量平衡法测算结果的相对误差在±15%以内，液流-株间微型蒸渗仪法能够适用于新疆杨蒸散量测定。
研究瞭甘肅石羊河流域人工種植防風固沙植物新疆楊的耗水規律，結果錶明：新疆楊樹榦日液流量變化幅度較大，呈現明顯的季節變化規律，且隨髮芽後天數的變化呈典型的二次拋物線型，確定繫數達0.765；新疆楊樹榦日液流量與日平均氣溫、水汽壓差、太暘輻射、風速等氣象因子的多元線性逐步迴歸模型的確定繫數為0.807，與日平均氣溫、水汽壓差、太暘輻射等氣象因子的偏相關繫數分彆為0.637、0.188和0.373，日平均氣溫是其最主要的影響因素；5-10月，新疆楊總蒸散量為508.26 mm，蒸髮量、蒸騰量所佔比率分彆為37.1%和62.9%，液流-株間微型蒸滲儀法和水量平衡法測算結果的相對誤差在±15%以內，液流-株間微型蒸滲儀法能夠適用于新疆楊蒸散量測定。
연구료감숙석양하류역인공충식방풍고사식물신강양적모수규률，결과표명：신강양수간일액류량변화폭도교대，정현명현적계절변화규률，차수발아후천수적변화정전형적이차포물선형，학정계수체0.765；신강양수간일액류량여일평균기온、수기압차、태양복사、풍속등기상인자적다원선성축보회귀모형적학정계수위0.807，여일평균기온、수기압차、태양복사등기상인자적편상관계수분별위0.637、0.188화0.373，일평균기온시기최주요적영향인소；5-10월，신강양총증산량위508.26 mm，증발량、증등량소점비솔분별위37.1%화62.9%，액류-주간미형증삼의법화수량평형법측산결과적상대오차재±15%이내，액류-주간미형증삼의법능구괄용우신강양증산량측정。
The water consumption of irrigated Populus alba var. Pyramidalis was studied in Shiyang River Basin. The results indicated that the daily sap flux in the trunk of Populus alba var. Pyramidalis showed obvious seasonal pattern, and correlated quadratic parabolic curve with the days after bud burst (DAB), with a determination coefficient of 0.765. The multiple linear regression of the daily sap flux (SF) of Popu-lus alba var. Pyramidalis with mean daily air tempreature (Ta), mean daily vapour pressure deficit (VPD), mean daily solar radiation (Rs) and mean daily wind speed (Vw) was programmed by SPSS using the stepwise regression method,with a high determination coefficient of 0.807. The partial coefficients be-tween SF and Ta,VPD,Rs were 0.637,0.188 and 0.373,respectively,indicating Ta was the prime meteo-rological factors. The combination method of Sap flow and Micro-lysimeter was used to measure the evapo-transpiration of irrigated Populus alba var. Pyramidalis., and its applicability was analyzed. In the growing season (from May to October), the overall evapotranspiration was 508.26 mm, with the proportion of 37.1% and 62.9% for evaporation and transpiration,respectively. The water balance method was used to es-timate the evapotranspiration of Populus alba var. Pyramidali.,with the relative error within ±15%,validat-ing the applicability of combination method of Sap flow and Micro-lysimeter.
