【摘要】 为探索防止果树缺铁失绿症方案,该研究以Fe-N为铁肥品种,以管道输液滴干的方式对中秋王苹果树输入不同浓度的溶液,测定叶片的叶绿素相对含量（SPAD值）、百叶重、百叶厚、全铁和活性铁含量及荧光参数等指标。结果表明:Fe-N管道输液滴干处理显著提高了苹果叶片的SPAD值、百叶重、百叶厚、全铁以及活性铁的含量,发现叶片SPAD值与活性铁含量之间呈现良好的线性关系（相关系数为0.899）,表明叶片SPAD值可以作为苹果缺铁诊断指标,同时也说明了苹果树体叶片黄化主要是由于活性铁含量低所致。16.4×10^-3mol·L^-1Fe-N溶液处理的叶片SPAD值、百叶重、百叶厚、全铁及活性铁含量显著高于其它处理,分别比对照提高了89.66%、20.42%、9.26%、158.0%、277.4%,该处理荧光参数也达到了较优水平。该研究结果为管道输液滴干防止苹果缺铁失绿症的应用奠定了基础。更多还原

【Abstract】 In order to explore the simple and labor-saving program of preventing iron deficiency chlorosis in fruit trees,we studied the effects of Fe-N solutions of different concentrations by pipeline transfusion and drip,contrasted by conventional management by determining the leaf SPAD value,hecto-leaf weight,hecto-leaf thickness,the content of total iron and active iron and so on. The results showed that the treatment of iron fertilizer pipeline transfusion significantly increased leaf SPAD value,hecto-leaf weight and hecto-leaf thickness,the content of total iron and active iron in leaves,while the chlorophyll fluorescence parameters also had a major impact. In addition,SPAD value and the content of activeiron had a good linear relationship,and the correlation coefficient reached 0. 899 through analyzing different grades yellow leaves. This result suggested that there was certain reliability with SPAD value as the way of diagnosing iron deficiency in apple,and it also explained that the yellowing leaf was mainly caused by the shortage of iron. The SPAD value,hecto-leaf weight,hecto-leaf thickness,the content of total iron and active iron in leaves were markedly improved by pipeline transfusing the solution of 16.4 × 10^-3mol·L^-1,which were increased by 89.66%,20.42%,9.26%,158.0%and 277.4% in the experiment,and the fluorescence parameters also reached the optimum level. The result showed that the technology of pipeline infusion dripping trunk significantly improved the index level of apple leaves,and the results laid the foundation for the application of pipeline trunk transfusion and drip in the prevention and treatment of iron deficiency chlorosis in apple.更多还原