摘要
以具有缺铁黄化病的5年生新高梨和1年生杜梨苗为研究对象,探究石灰性土壤条件下施用不同量的无机铁肥(FeSO_(4)·7H_(2)O)和螯合铁肥(Fe-EDDHA)对梨树叶绿体色素、微量元素含量等生理指标和果实品质的影响,及其潜在的作用机理。结果表明:石灰性土壤条件下,施用无机铁肥(FeSO_(4)·7H_(2)O)处理的新高梨叶绿体色素含量、果实品质与清水对照无显著差异;T3处理[株施螯合铁肥(Fe-EDDHA)5 g+2周后株施螯合铁肥(Fe-EDDHA)5 g]的新高梨叶片部分复绿,而T4处理[株施螯合铁肥(Fe-EDDHA)15 g+2周后株施螯合铁肥(Fe-EDDHA)15 g]的新高梨叶片完全复绿,其叶片总叶绿素含量、活性铁含量、单果重和可溶性固形物含量分别较对照显著增加542.0%、251.4%、22.1%和15.3%。缺铁条件下,杜梨二价铁转运蛋白基因PbIRT1表达量升高,二价金属离子转运能力增强,对照和施用无机铁肥(FeSO_(4)·7H_(2)O)处理的新高梨叶片全硼、全铜、全锌、全锰含量与杜梨根系活性铜、活性锌、活性锰含量均高于施用螯合铁肥(Fe-EDDHA)处理。综上,结果初期梨树出现缺铁黄化症状之后,株施螯合铁肥(Fe-EDDHA)15 g+2周后株施螯合铁肥(Fe-EDDHA)15 g能有效提高石灰性土壤上梨树叶片叶绿体色素和活性铁含量,提升果实品质,矫治缺铁黄化病。
Taking 5-year-old ‘Niitaka’ pear and 1-year-old Pyrus betulifolia with iron deficiency chlorosis as the research objects,the effect of different amounts of inorganic iron fertilizer(FeSO_(4)·7 H_(2)O) and chelated iron fertilizer(Fe-EDDHA) on physiological indicators such as leaf plastid pigment,trace element content and fruit quality,as well as their potential mechanism of pears under calcareous soil was investigated.The results showed that under calcareous soil conditions,the chloroplast pigment content and fruit quality of ‘Niitaka’ pear treated with inorganic iron fertilizer(FeSO_(4)·7 H_(2)O) were not significantly different from those treated with clean water;the leaves of ‘Niitaka’ pear treated with T3[5 g of chelated iron fertilizer(Fe-EDDHA) per plant+5 g of chelated iron fertilizer(Fe-EDDHA) per plant after 2 weeks]were partially regreened,while the leaves of ‘Niitaka’ pear treated with T4 [15 g of chelated iron fertilizer(Fe-EDDHA) per plant+15 g of chelated iron fertilizer(Fe-EDDHA) per plant after 2 weeks] were completely regreened,and the total chlorophyll content of leaves,active iron content of leaves,single fruit weight and soluble solid content of fruit were significantly increased by 542.0%,251.4%,22.1% and 15.3%,respectively,compared with the control.Under iron deficiency conditions,the expression level of the ferrous iron regulated transporter gene Pb IRT1 in Pyrus betulifolia was increased,and the divalent metal ion transport capacity was enhanced,the contents of total boron,total copper,total zinc,and total manganese in leaves of control and treated with inorganic iron fertilizer(FeSO_(4)·7 H_(2)O) and the contents of active copper,active zinc,and active manganese in roots of Pyrus betulifolia were higher than those of treated with chelated iron fertilizer(Fe-EDDHA).To sum up,the results showed that after the initial symptoms of iron deficiency chlorosis in pear tree,the application of 15 g of chelated iron fertilizer(Fe-EDDHA) per plant+15 g of chelated iron fertilizer(F
作者
郭献平
郭鹏
王东升
蒋卉
吴中营
韩永平
智梦茹
GUO Xianping;GUO Peng;WANG Dongsheng;JIANG Hui;WU Zhongying;HAN Yongping;ZHI Mengru(Institute of Horticulture,Henan Academy of Agricultural Sciences,Zhengzhou 450002;College of Horticulture,Henan Agricultural University)
出处
《中国果树》
北大核心
2022年第10期7-12,18,共7页
China Fruits
基金
河南省重点研发与推广专项(科技攻关)项目(202102110412)
河南省农业科学院科技创新团队(2022TD23)
河南省中央引导地方科技发展专项(YDZX20214100003354)
国家现代农业产业技术体系项目(CARS-28)。
