论文部分内容阅读
应用Ｐ一Ｖ技术研究了野外条件下海红、山杏和沙枣三个树种的水分参数(ＲＯＷＣ_(ｔｌｐ)，ＲＷＣ_(ｔｌｐ)和ＡＷＣ）及其季节变化规律。探讨了树种对干旱胁迫的适应性反应。结果表明：树木各水分参数的季节变化规律与气候条件，尤其是水分条件相关，并与树木长期适应当地气候条件而形成的物候节律有关。嫩枝生长阶段是树木抗旱性最弱的时期，随着干旱锻炼过程的进行及小枝木质化程度的提高，树木的抗旱性不断增强。树木的抗旱性具有一定的波动性。应用与综合抗旱性指数可以作为判别树木抗旱性的指标。
The water parameters (ROWC_ (tlp), RWC_ (tlp) and AWC) of three species of red seaweed, wild apricot and jujube under field conditions were studied by P-V technique and their seasonal variations were also studied. The adaptive response of tree species to drought stress was discussed. The results showed that the seasonal variation of the water parameters was related to the climatic conditions, especially to the water conditions, and was related to the phenological rhythm formed by long-term adaptation of the trees to the local climatic conditions. The shoot growth phase is the weakest period for the tree drought resistance. With the progress of drought training and the increase of branchlet woodiness, the drought resistance of trees is continuously enhanced. Drought resistance of trees has some volatility. Application and comprehensive drought resistance index can be used as indicators to determine the drought resistance of trees.