您好，欢迎访问江苏省农业科学院 机构知识库！
江苏省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Mitigation of soil acidification in orchards: A case study to alleviate early defoliation in pear (Pyres pyrifolia) trees

文献类型： 外文期刊

作者： Kang, Yalong 1 ; Yang, Han 1 ; Zeng, Shaomin 2 ; Jiang, Shangtao 1 ; Xie, Changyan 3 ; Wang, Zhonghua 4 ; Dong, Caixia 1 ;

作者机构： 1.Nanjing Agr Univ, Natl Engn Res Ctr Organ Based Fertilizers, Jiangsu Collaborat Innovat Ctr Solid Organ Waste, Jiangsu Prov Key Lab Organ Solid Waste Utilizat, Nanjing 210095, Peoples R China

2.Fujian Acad Agr Sci, Res Ctr Engn Technol Fujian Deciduous Fruits, Fruit Res Inst, Fuzhou 350013, Peoples R China

3.Huaian Acad Agr Sci, Res Ctr Agr Resources Environm & Soil Fertilizer, Huaian 223001, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Pomol, Nanjing 210014, Peoples R China

关键词： Acid red soil; Bioorganic fertilizer; Leaf nutrient; Network analysis; Pear; Root system architecture

期刊名称：RHIZOSPHERE （ 影响因子：3.129； ）

ISSN：

年卷期： 2021 年 20 卷

页码：

收录情况： SCI

摘要： Long-term application of chemical fertilizers has aggravated red soil acidification and caused severe early defoliation in pear-growing region of southern China. To investigate the effects of BIO and HA on the growth and activity of fine roots, and in turn the effect on leaf nutrient status and early defoliation of pear trees, we conducted a 2-year pot experiment (2018-2019) using 1-year-old pear (Pyres pyrifolia) seedlings in a pear orchard in southern China. Four fertilization treatments were included: chemical fertilizer as control (CF), CF with humic acid (CF-HA), BIO, and BIO mixed with HA (BIO-HA). Results showed that BIO and BIO-HA treatments significantly decreased the early defoliation rate of pear trees about 18%-27% compared with CF and CF-HA treatments. For the growth status of the aboveground, the relative growth rate of pear trees treated by BIO and BIO-HA was 1.2 times higher than the CF treatment at 180 days after budding, and it was accompanied by an increase of leaf thickness, microelements content (e.g. calcium, manganese, iron and zinc), and a decrease of leaf temperature. Compared with CF treatment, BIO or BIO-HA significantly improved soil pH value by 0.9-1.1 units, and increased soil exchangeable calcium content by 50%-83%. BIO and BIO-HA treatments also significantly increased total lateral root number, length and root activity, which were negatively correlated with the early defoliation rate by the network analysis. Furthermore, structural equation model showed that mot traits were the core factor to alleviate the early defoliation rate, which was directly or indirectly driven by the application of bioorganic fertilizer. In conclusion, BIO or BIO combined with HA can alleviate the early defoliation rate of pear trees by mitigating soil acidification to stimulate the lateral root growth and activity, and in turn increase leaf micronutrients content and aboveground growth. Our study shows that measuring mot traits are at the core of plant responses to soil nutrient status and pH.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江苏省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台