| 摘要: |
| 【目的】研究抗蒸腾叶面肥对苗木抗旱性的调节作用，为提高苗木成活率提供参考。【方法】采用正交试验法，在不同土壤含水率条件下，用不同含量的叶面肥对核桃(Juglans regia)、山杏(Prunus armeniaca L.)、刺槐(Robinia pseudoacacia)进行处理，并以清水作对照，分析不同处理下苗木气孔阻力、蒸腾速率、叶水势等抗旱生理指标的变化，并运用极差分析的方法对各参试树种的抗旱性进行评价，筛选出能有效增强苗木抗旱性的叶面肥种类及其含量。【结果】 在降低苗木蒸腾速率和增加叶水势方面，最佳的组合为：树种选用刺槐，叶面肥选用2号，叶面肥含量为0.67～0.83 mL/L，土壤含水率为10%～15%；在增加气孔阻力方面，最优组合为：树种选用刺槐，叶面肥选用2号，叶面肥含量为1.11 mL/L，土壤含水率为 5%。【结论】 2号叶面肥能有效提高苗木的抗旱能力，刺槐是3个树种中抗旱能力最强的树种，适合作为干旱条件下的造林树种。 |
| 关键词: 叶面肥 抗旱性 蒸腾速率 气孔阻力 叶水势 |
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| 基金项目:国家“十一五”科技支撑计划专题（2006BAD03A0301） |
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| Anti-transpiration foliar fertilization on regulatory function of drought resistance |
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| Abstract: |
| 【Objective】The article studied resistance control action about anti-transpiration foliar fertilization to the nursery stock drought in order to enhance the plant survival.【Method】The method of orthogonal test was used to explore the mechanism on drought resistance of seedlings of several foliar fertilizer.In different conditions of soil moisture,the thesis used different concentrations of foliar fertilizer of different densities to process Juglans regia,Prunus armeniaca L.and Robinia pseudoacacia,and carried on the comparison with the clear water comparison,then determined and analyzed the changes in physiological indicators of drought resistance of the various tests seedling such as stomatal resistance,transpiration rate,leaf water potential under different processings.The study selected leaf surface fertilization types and their ratio,which can effectively enhance the drought resistance by using the method of the pole difference analysis to evaluate the effects of the tested species of drought resistant.【Result】 The results showed that plants have an obvious effect on reducing transpiration rate and enhancing the leaf water potential under the conditions of Robinia pseudoacacia,No.2 fertilizer,the concentration of 0.67-0.83 mL/L,the soil moisture content of 10%-15% were selected.It was the best treatment combination to increase the stomatal resistance while Robinia pseudoacacia and No.2 fertilizer were used,the concentration of 1.11 mL/L and the soil moisture content of 5% were selected.【Conclusion】 No.2 fertilizer could improve drought-resistant capacity of plants.Robinia pseudoacacia was the tree species with the strongest drought-resistant capacity,which suggested it was suitable as a species to be used in drought conditions. |
| Key words: foliar fertilization drought resistance transpiration rate stomatal resistance leaf water potential |
