用３００ｍｇ／ＬＰＰ_（３３３）和３０ｍｇ／ＬＳ－３３０７喷雾处理一叶一心期的水稻幼苗。三叶一心期取第二叶分别置于干旱及低温条件下，于胁迫处理后的不同时间测定叶片的电导率、脯氨酸含量及ＡＢＡ含量的变化。结果表明：ＰＰ＿（３３３）和Ｓ－２３０７均能明显减小干旱或低温胁迫下叶片的电导率及脯氨酸含量的上升。对照叶片在干旱胁迫下Ａｌ３Ａ含量在４ｈ之内迅速上升，然后又急剧下降，而ＰＰ＿（３３３）及Ｓ－３３０７可级解这种变化，即使ＡＢＡ含量的上升和下降幅度都大为减低。 One-leaf stage rice seedlings were sprayed with 300 mg / L LP 333 and 30 mg / L S-3307. Clover one heart phase to take the second leaves were placed in the arid and low temperature conditions, at different times after stress treatment leaf conductivity, proline content and ABA content changes. The results showed that PP_ (333) and S-2307 significantly reduced the electrical conductivity and proline content of leaves under drought or cold stress. The content of Al3A in control leaves increased rapidly within 4h under drought stress and then dropped sharply again. However, PP333 and S-3307 could level up this change, even though the increase and decrease of ABA content were greatly reduced.