中国农村水利水电
中國農村水利水電
중국농촌수이수전
CHINA RURAL WATER AND HYDROPOWER
2014年
9期
23-27
,共5页
陈思%何新林%杨广%许双堆%杨文新
陳思%何新林%楊廣%許雙堆%楊文新
진사%하신림%양엄%허쌍퇴%양문신
荒漠植被%液流速率%光合蒸腾速率%气象因子%土壤含水率
荒漠植被%液流速率%光閤蒸騰速率%氣象因子%土壤含水率
황막식피%액류속솔%광합증등속솔%기상인자%토양함수솔
desert vegetation%liquid flow rate%photosynthesis and transpiration rate%meteorological factor%soil moisture content
植物茎干液流量可表征其蒸腾耗水量,反映植被水分传输状况,可用于计算植被生态需水量。以玛纳斯河流域古尔班通古特沙漠南缘典型荒漠植被梭梭、柽柳为研究对象,通过数据监测,研究植被茎干液流及光合蒸腾特性,分析气象因子及土壤含水率对茎干液流的影响。结果表明:梭梭、柽柳茎干液流速率呈明显的昼夜变化规律,白天液流速率远高于夜间;梭梭的净光合速率日变化模式为双峰型,柽柳为单峰型;梭梭蒸腾速率的日变化有明显上升和下降过程,柽柳趋势不明显,呈小幅震荡;液流速率变化与相对空气湿度呈负相关,空气湿度高时液流速率低;气温、总辐射与液流速率的变化趋势基本一致,液流速率随着气温或总辐射的增强而增大;随着土壤含水率降低,液流速率降低。
植物莖榦液流量可錶徵其蒸騰耗水量,反映植被水分傳輸狀況,可用于計算植被生態需水量。以瑪納斯河流域古爾班通古特沙漠南緣典型荒漠植被梭梭、檉柳為研究對象,通過數據鑑測,研究植被莖榦液流及光閤蒸騰特性,分析氣象因子及土壤含水率對莖榦液流的影響。結果錶明:梭梭、檉柳莖榦液流速率呈明顯的晝夜變化規律,白天液流速率遠高于夜間;梭梭的淨光閤速率日變化模式為雙峰型,檉柳為單峰型;梭梭蒸騰速率的日變化有明顯上升和下降過程,檉柳趨勢不明顯,呈小幅震盪;液流速率變化與相對空氣濕度呈負相關,空氣濕度高時液流速率低;氣溫、總輻射與液流速率的變化趨勢基本一緻,液流速率隨著氣溫或總輻射的增彊而增大;隨著土壤含水率降低,液流速率降低。
식물경간액류량가표정기증등모수량,반영식피수분전수상황,가용우계산식피생태수수량。이마납사하류역고이반통고특사막남연전형황막식피사사、정류위연구대상,통과수거감측,연구식피경간액류급광합증등특성,분석기상인자급토양함수솔대경간액류적영향。결과표명:사사、정류경간액류속솔정명현적주야변화규률,백천액류속솔원고우야간;사사적정광합속솔일변화모식위쌍봉형,정류위단봉형;사사증등속솔적일변화유명현상승화하강과정,정류추세불명현,정소폭진탕;액류속솔변화여상대공기습도정부상관,공기습도고시액류속솔저;기온、총복사여액류속솔적변화추세기본일치,액류속솔수착기온혹총복사적증강이증대;수착토양함수솔강저,액류속솔강저。
Plant stem sap flow of water consumption ,that reflects the status of vegetation water transmission ,and determines the vegetation ecological water requirement .Research's study objectn is Haloxylon ammodendron and Tamarix vegetation that in the southern Gurbantunggut Desert of Manasi River Basin ,Through the data monitoring to research the liquid flow and the characteris-tics of photosynthesis and transpiration of vegetation stem ,and analysis of the effect on the stem sap flow of meteorological factors and soil moisture content .The results show that :Haloxylon ammodendron and Tamarix stem sap flow rate showed a significant di-urnal variation ,the flow rate is much higher than the night .Changes in net photosynthetic rate of Haloxylon ammodendron mode light of day is shuangfeng type and Tamarix chinensis belong to Single peak type .Diurnal changes of transpiration rate of Haloxylon ammodendron had the obvious rise and fall ,but Tamarix tendency is not obviously .The liquid flow rate was negatively correlated with relative humidity of the air ,and the change trend of temperature ,radiation and the liquid flow rate is basically the same .Along with the soil water content decreased ,the liquid flow rate decreased .