The effects of chemical and organic fertilizer usage on rhizosphere soil in tea orchards
The effects of chemical and organic fertilizer usage on rhizosphere soil in tea orchards
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DOI：
10.1371/journal.pone.0217018
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发表时间：
2019-05-28
期刊：
影响因子：
3.7
通讯作者：
Lin, Wenxiong
中科院分区：
文献类型：
--
作者：
Lin, Weiwei;Lin, Manhong;Lin, Wenxiong
可持续农业是一个重要的全球性问题。使用有机肥料可以提高作物产量和土壤性质，同时抑制病虫害。本研究的目的是评估长期施用化学肥料和有机肥料对茶园茶叶和根际土壤性质的影响。采用电感耦合等离子体质谱（ICP-MS）和高通量测序技术分析根际土壤重金属含量和细菌组成。结果表明，有机肥处理显著降低了根际土壤中Cu、Pb、Cd的含量。有机肥处理显著降低了茶叶中Cd、Pb、As的含量。此外，有机肥还显著提高了茶叶中氨基酸含量和土壤pH值。有机肥的施用显著增加了伯克霍尔德菌目、粘球菌目、链霉菌目、硝化螺旋菌目、链节杆菌目、酸杆菌目、芽单胞菌目和假诺卡氏菌目的相对丰度，降低了假诺卡氏菌目、弗兰克氏菌目、根瘤菌目和黄单胞菌目的相对丰度。因此，施用有机肥有利于茶树根际土壤微生物组成的形成和有益菌的补充，从而提高茶叶品质，降低根际土壤和茶叶中重金属含量。
Sustainable agriculture is an important global issue. The use of organic fertilizers can enhance crop yield and soil properties while restraining pests and diseases. The objective of this study was to assess the effects of long-term use of chemical and organic fertilizers on tea and rhizosphere soil properties in tea orchards. Inductively coupled plasma mass spectrometry (ICP-MS) and high-throughput sequencing technology analyses were used to investigate heavy metals content and bacterial composition in rhizosphere soils. Our results indicated that organic fertilizer treatment significantly decreased Cu, Pb and Cd contents in rhizosphere soil sample. The results also showed that treatment with organic fertilizer significantly decreased the contents of Cd, Pb and As in tea leaves. Furthermore, organic fertilizer significantly increased the amino acids content of tea and the pH of the soil. The use of organic fertilizer significantly increased in the relative abundance of Burkholderiales, Myxococcales, Streptomycetales, Nitrospirales, Ktedonobacterales, Acidobacteriales, Gemmatimonadales, and Solibacterales, and decreased the abundance of Pseudonocardiales, Frankiales, Rhizobiales, and Xanthomonadales. In conclusion, organic fertilizer can help to shape the microbial composition and recruit beneficial bacteria into the rhizosphere of tea, leading to improved tea quality and reduced heavy metals content in rhizosphere soil and tea leaves.