【摘要】 研究了叶面喷施抗蒸剂对盆栽苹果水分状态的影响。结果表明：抗旱剂一号（主要成分为黄腐酸）可明显降低树体蒸腾（最低时为对照的３９．２１％）、提高气孔阻力（最大时为对照的２４３．９６％）和叶片水势（一般比对照提高０．２－０．４ＭＰａ、最大０．７ＭＰａ），并对叶温未产生明显的影响（变化一般小于１℃），有效作用期长达１５ｄ以上。在果树旱期喷施，可明显改善树体水分状态。腐殖酸效果不明显。更多还原

【Abstract】 Three-year-old potted apple trees cv. Liao-fu were used in the experiment. Results showed that fulvicacid decreased the transpiration(the minimum decrease was 39.21%lower than the control),significantly in-creased the stomatal resistance(the maximum increase was 243.96%when compared with the control)andraised leaf water potential(0.2- 0.4 MPa in general,reached the maximum of 0.7 MPa).While there hadno significant influence on leaf temperature(the differences were less than 1℃).The effect could last formore than 15 days. Spray application during drought period could improve significantly the water status offruit trees. No appreciable effect of humus acid was noted.更多还原