天然油菜素内酯对红富士苹果抗旱增产效应的研究

 采用随机区组试验设计的方法, 研究了天然油菜素内酯对红富士苹果生长发育的影响, 结果表明, 天然油菜素内酯处理增加了叶片相对含水量和临界饱和亏, 降低了自然饱和亏、需水程度、蒸腾速率、细胞膜透性和伤害率, 减轻了叶片的水分损失, 提高了苹果的抗旱性。测定结果显示, 天然油菜素内酯处理促进了苹果叶片生长, 抑制了秋梢的萌生, 提高了坐果率和产量, 但未降低果实的品质。

Effect of Natural Brassinolide on Drought Resistance and Yield of Red Fuji Apple

To provide the theoretical basis on apple cultivation,some indicators of drought resistance, yield and fruit quality of red Fuji apple were studied after apple leaves were sprayed with different concentration of natural brassinolide. The experiment was set up as a completely randomized block design with twelve replicates. The research results showed that the relative water content and critical saturation deficit were increased. Natural saturation deficit, the degree of water requirement, the rate of transpiration, cell membrane permeability and injury rate were decreased compared with control. Natural brassinolide reduced water loss of apple leaves and enhanced its drought resistance. The results also indicated that natural brassinolide improved the growth of apple leaves, restrained the growth of shoot in autumn, and increased fruit set and yield of apple without reducing apple quality.