CAJ | 학술논문

针对西藏牧区海拔高、日温差大、太阳辐射强、空气干湿变化大的特点，在田间试验基础上，分析了燕麦叶水势(7 L )的日变化规律及其与西藏典型气象因子---大气温度( T )、太阳辐射( Rs)、空气相对湿度(R H )的关系，并建立了回归模型。结果表明，燕麦不同生育期7L 的日变化差异显著，其中幼苗期和抽穗期呈“ V 型”变化趋势，分蘖期和拔节期呈“ W 型”变化趋势，最高日变幅可达6 M Pa。经回归分析判定气象因子对燕麦各生理指标影响显著性的先后关系为7 L：T> RH > Rs。研究结果对探求灌溉草地水文循环规律，制定科学灌溉制度，提高高寒牧区人工草地的水分利用效率具有重要意义。
침대서장목구해발고、일온차대、태양복사강、공기간습변화대적특점，재전간시험기출상，분석료연맥협수세(7 L )적일변화규률급기여서장전형기상인자---대기온도( T )、태양복사( Rs)、공기상대습도(R H )적관계，병건립료회귀모형。결과표명，연맥불동생육기7L 적일변화차이현저，기중유묘기화추수기정“ V 형”변화추세，분얼기화발절기정“ W 형”변화추세，최고일변폭가체6 M Pa。경회귀분석판정기상인자대연맥각생리지표영향현저성적선후관계위7 L：T> RH > Rs。연구결과대탐구관개초지수문순배규률，제정과학관개제도，제고고한목구인공초지적수분이용효솔구유중요의의。
The alpine pastoral area of Tibethas high elevation, large daily temperature range, strong solar radiation, and high var-iation of air humidity. In this study, the field experimentwas conducted to analyze the diurnal variation of leaf water potential of oat( 7 L) and its relationship with the typical meteorological factors such as atmospheric temperature( T) , solar radiation( R s) , and relative air humidity( RH ) to establish the corresponding regression models. The experimentresults showed thatthe daily variation of oat' s 7 Lis significantly differentduring differentgrowth stages. The oat' s 7 Lshowed‘V-type' during the seeding stage and heading stage; while itshowed‘W-type' during the jointing stage and tillering stage, and the maximum variation range of 7 Lcan reach 6 MPa in a day. Based on the regression analysis, the order of significanteffects of meteorological factors on oat′s 7 Lwas T> RH> R s. These results are of vital signif icance for seeking the hydrologic cycle rules of the irrigated grass, formulating the scientific irrigation schedule, and increasing the water use efficiency of grass growing in the alpine area.