保水剂与水分控制对辣椒生长及水分利用效率的影响研究

The effect of aquasorb and water controlling on capsicum growth and water use efficiency

栽辣椒应用保水剂和实施 3种水分控制处理结果表明 ,施用保水剂对辣椒生长及水分利用效率有明显促进作用 ,辣椒叶面积、叶数、株高、生物量和水分利用效率均优于未施保水剂处理。水分控制对辣椒的影响表现为充分供水促进辣椒生长 ,水分胁迫延缓辣椒生长速度。灰色关联分析发现是否施用保水剂对辣椒生物量、叶面积、叶数、株高、干物质含量、根冠比与耗水量相关性的影响存在差异 ,施用保水剂处理耗水量与各性状关联度顺序依次为生物量 >茎叶干物质量 >根干物质量 >叶数 >株高 >叶面积 >根冠比 >干物质含量 ,而未施用保水剂处理耗水量与各性状关联度顺序依次为生物量 >叶数 >茎叶干物质量 >根干物质量 >株高 >叶面积 >干物质含量 >根冠比。

Capsicums were planted in pots and dealt with aquasorb and three levels of water controlling [100% field capacity of soil water (FC), 75% FC, and 50% FC]. The results show that the application of aquasorb can obviously improve the growth and water use efficiency of capsicums. The leaf area, leaf number, plant height, biomass and water use efficiency of capsicums with aquasorb treatment are prior to those of non-aquasorb treatments. At the same time, high-water supply can improve the growth of capsicums while low-water supply delays its growth rate. The data processing result by grey correlation analysis show that the close extents of relation among the water consume and biomass, leaf area, leaf number, plant height, dry biomass content and root crown ratio are different due to applying aquasorb or not. The relation sequence of applying aquasorb is biomass>dry biomass of stem and leaf>dry biomass of root>leaf number>plant height>leaf area>root crown ratio>dry biomass content, but the relation sequence without aquasorb is biomass>leaf number>dry biomass of stem and leaf>dry biomass of root>plant height>leaf area>dry biomass content>root crown ratio