CAJ | 학술논문

通过对苹果树叶水势进行测定，研究了不同灌溉方式及灌水量条件下的叶水势日变化规律，分析了土壤含水量及气象因子对苹果树叶水势的影响。结果表明，不同灌溉方式及灌水量条件下的叶水势在不同月份的日变化趋势大致相同，均为先减小后增大（清晨与傍晚的叶水势较高，午间的最小）。蓄水坑灌条件下的叶水势明显高于地面灌溉，土壤水分相对匮乏时，非充分灌水条件下的叶水势较充分灌水的高。苹果树清晨叶水势与对应时期的土壤含水量整体上呈正相关关系。通过通径分析得知，在3个气象因子中，大气温度对苹果树叶水势日变化的影响最大，其次是大气相对湿度和太阳辐射。
통과대평과수협수세진행측정，연구료불동관개방식급관수량조건하적협수세일변화규률，분석료토양함수량급기상인자대평과수협수세적영향。결과표명，불동관개방식급관수량조건하적협수세재불동월빈적일변화추세대치상동，균위선감소후증대（청신여방만적협수세교고，오간적최소）。축수갱관조건하적협수세명현고우지면관개，토양수분상대궤핍시，비충분관수조건하적협수세교충분관수적고。평과수청신협수세여대응시기적토양함수량정체상정정상관관계。통과통경분석득지，재3개기상인자중，대기온도대평과수협수세일변화적영향최대，기차시대기상대습도화태양복사。
By measuring the leaf water potential of apple trees ,the diurnal changes of leaf water potential under different irrigation methods and irrigation amounts are studied ,the influences of soil moisture and meteorological factors on the leaf water potential of apple trees are analyzed .The results show that in different months ,the leaf water potential of different irrigation methods and irriga‐tion amounts have a similar diurnal variation trend ,which decreases firstly and then followed by increase(peaked in the morning and evening while bottom out at midday) .Leaf water potential is obviously higher under water storage pit irrigation than surface irriga‐tion .When the soil moisture is relatively scarce ,leaf water potential under insufficient irrigation is higher than that under sufficient irrigation .The early morning leaf water potential of apple trees is significantly correlated to the soil moisture in corresponding peri‐ods .Path analysis shows that among the three meteorological factors ,atmospheric temperature has a greatest influence on the diur‐nal variation of leaf water potential of apple trees ,followed by air relative humidity and solar radiation .