保水剂与外源物质复合配方对苗木蒸腾速率和叶水势的影响  

Effect of Transpiration Rate and Leaf Water Potential Based on the Composite Formulations of Super Absorbent Polymer and Exogenous Substance

作　　者：王婷[1] 王百田[1] 王红[1] 张东东[1] 隋旭红[1] 杨健[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院,北京100083

出　　处：《安徽农业科学》2011年第2期692-696,共5页Journal of Anhui Agricultural Sciences

基　　金：国家"十一五"科技支撑项目"困难立地工程造林新材料;新产品及应用技术"(2006BAD03A0301)

摘　　要：为改善困难立地土壤的保水保肥能力,以核桃、山杏和紫穗槐幼苗为试材,采用正交试验法组合配方,将不同浓度保水剂(SAP)和外源物质复合,进行了盆栽试验,用极差分析和相关性分析筛选出最佳方案。结果表明:不同浓度SAP与外源物质处理下,核桃、山杏、紫穗槐的蒸腾速率日变化均呈现双峰型;在提高叶片蒸腾速率方面效果以处理⑤:山杏、SAP 10 g、吲哚乙酸(IAA)0.250 0%+萘乙酸(NAA)0.500 0%、聚天门冬氨酸(PASP)10 g最显著。由于保水剂与外源物质的施入,改变了土壤的供水方式,使得苗木叶水势日变化曲线变幅较小;在提高叶片水势方面的效果以处理⑨:紫穗槐、SAP 15 g、IAA 0.250 0%+NAA 0.500 0%、PASP 1 g最为显著。最后,从抗旱性的角度考虑,对处理⑤、⑨的蒸腾速率和叶片水势进行相关性分析,筛选出最优配方为处理⑨。将保水剂与外源物质复合一体化这一技术运用在林木培育上,对于干旱地区造林具有重要意义。In order to improve the capacity of retaining water and fertilizer in poor site,taking Juglans regia,Prunus sibirica and Amorpha fruticosa as materials,pot experiment was carried out with the composite formulations of super absorbent polymer（SAP） and exogenous substance.Data was analyzed through range analysis and correlation analysis to determine the optimal proportion of SAP and exogenous substance applying orthogonal text to composite formulations.Daily changes of transpiration rates showed a bimodal change while the different concentrations of SAP and exogenous substance were applied on Juglans regia,Prunus sibirica and Amorpha fruticosa.The most prominent combination in enhancing transpiration rate was treatments：Prunus sibirica＋SAP 10 g＋IAA 0.250 0%＋NAA0.500 0%＋polyaspartic acid（PASP）10 g.As the application of SAP and exogenous substance,the water supply of soil was changed,and the change ability of the curve of leaf water potential were decreasedrelatively.The most influential formulation of leaf water potential was treatment ⑨：Amorpha fruticosa＋SAP 15 g＋IAA 0.250 0%＋NAA 0.500 0%＋PASP 5 g.Finally,in the view of drought resistance,the correlation between transpiration rate and leaf water potential of treatment ⑤ and ⑨ showed the best formulation was treatment ⑨.Applying the technology of the SAP compound and exogenous substance in the forest cultivation is of great significance to afforestation in arid areas.

关 键 词：保水剂 复合 正交试验 核桃 山杏 紫穗槐 

分 类 号：S27[农业科学—农业水土工程]