Effects of Soil Aeration and Fertilization Practices on Alleviating Iron Deficiency Chlorosis in "Huangguan" Pears Grafted onto Quince A in Calcareous Soils
文献类型： 外文期刊
作者： Zhao, Yanyan 1 ; Li, Haigang 1 ; Sun, Mingde 2 ; Liang, Zhenxu 2 ; Yu, Futong 3 ; Li, Fei 1 ; Liu, Songzhong 2 ;
作者机构： 1.Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Inner Mongolia Key Lab Soil Qual & Nutrient Resou, Hohhot 010018, Peoples R China
2.Beijing Acad Forestry & Pomol Sci, Beijing Engn Res Ctr Deciduous Fruit Trees, Key Lab Biol & Genet Improvement Hort Crops North, Minist Agr, Beijing 100093, Peoples R China
3.China Agr Univ, Coll Agr Resources & Environm Sci, Beijing 100193, Peoples R China
关键词： pears; Fe deficiency; fertilization; chlorosis alleviation; calcareous soil
期刊名称：HORTICULTURAE （ 影响因子：2.331； 五年影响因子：2.951 ）
ISSN：
年卷期： 2021 年 7 卷 7 期
页码：
收录情况： SCI
摘要： In North China, the high-quality pear cultivar "Huangguan" (Pyrus bretschneideri Rehd. cv), which is grafted onto dwarf quince A (Cydonia oblonga Mill. cv) rootstock and grown in calcareous soil, experiences severe iron (Fe) deficiency; this deficiency greatly constrains tree growth as well as fruit yield and quality. Therefore, we evaluated the effects of six practices for alleviating chlorosis caused by Fe deficiency in "Huangguan" grafted onto quince A (HG-QA). The practices included ridging with landscape fabric mulching as a control, flattening with landscape fabric mulching (FM), ridging without landscape fabric mulching (R), flattening without landscape fabric mulching (F), Fe fertilizer application in soil (SFe), foliar Fe application (FFe), and manure application (M). The results showed that the leaf Fe concentration increased by 356% under FFe, compared to that under the control, but the practice failed to alleviate Fe deficiency chlorosis. In contrast, an increase in leaf Fe concentration and chlorosis alleviation were observed under F. F alleviated chlorosis mainly by increasing the root ferric-chelate reductase activity. These results indicate that Fe uptake and utilization in leaves are independent biochemical processes and soil aeration improvement have positive effect on increasing Fe uptake. M improved both the soil active Fe concentration and leaf Fe utilization. Thus, manure application should be the first choice for alleviating Fe deficiency chlorosis in HG-QA grown in calcareous soils. Combining manure application with other practices that increase Fe uptake would likely be an effective way to address the problem of Fe deficiency chlorosis.
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