Effects of Spanish River Carbonatite on Soil and Bacterial Community at Tea Plantations
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摘要:
目的 探讨西班牙河碳酸盐岩(Spanish river carbonatite, SRC)对茶园土壤酸化、重金属以及土壤细菌多样性和群落结构的影响,为茶园土壤改良提供科学依据。 方法 通过盆栽和大田试验,应用pH计、原子荧光法以及高通量测序技术分析施用SRC对茶园土壤pH、重金属含量以及细菌群落的影响。 结果 大田和盆栽试验均表明添加SRC可提高茶树种植土壤的pH值,盆栽试验表明低浓度的SRC的施入量就可显著降低土壤中Cd、Cu的含量,大田试验表明SRC的施用可显著降低8种重金属的含量;盆栽试验表明SRC对土壤微生物的组成有显著影响,大田试验表明施用SRC可提高土壤养分。 结论 施用SRC可显著改良茶园土壤,改良土壤重金属污染,增加茶园土壤的养分。 Abstract:Objective Effects of Spanish river carbonatite (SRC) on acidification and metal elements in soil and structure and diversity of microbial community at tea plantations were investigated. Method Changes on pH, heavy metals, and microbial community in the soil under SRC application were monitored for evaluation. Result The field and pot culture experiments showed that SRC addition alleviated acidification and heavy mental pollution in the soil. In the pot culture, low concentration of SRC significantly reduced the contents of Cd and Cu in soil. Whereas, the field experiment showed significant reductions on all tested heavy metals. In comparison to control, SRC addition exerted a significant impact on the microbial community structure in the pot culture, and increased the nutrient contents facilitating the microbial growth in the field test. Conclusion Both field and pot experiments demonstrated the desirable rise on pH, decline on heavy metals content, and improvements on microbial diversity and community structure in the soil by the incorporation of SRC. -
表 1 室内SRC处理对土壤pH值及重金属含量的影响
Table 1. Effects of SRC on pH and heavy metals in pot soil
指标 Index CK(2017) CK(2018) 1%SRC 5%SRC 10%SRC 20%SRC pH 6.13±0.09 b 5.93±0.09 b 6.23±0.19 ab 6.10±0.06 b 6.60±0.54 a 6.10±0.15 b Cd/(mg·kg−1) 0.29±0.02 b 0.35±0.034 ab 0.21±0.01 c 0.21±0.02 c 0.38±0.02 a 0.11±0.001 c Cr/(mg·kg−1) 40.30±1.55 b 54.20±4.84 a 51.70±1.24 a 55.40±2.66 a 50.70±0.29 a 39.90±3.89 b Pb/(mg·kg−1) 29.10±2.02 c 39.10±4.05 ab 33.00±0.75 b 45.60±1.12 a 34.70±3.07 b 25.50±1.70 c Cu/(mg·kg−1) 116.70±2.90 b 104.70±9.60 b 220.80±13.50 a 221.50±12.20 a 65.50±4.80 c 30.60±2.20 d Ni/(mg·kg−1) 18.70±0.88 b 36.80±3.77 a 32.20±1.09 a 34.40±2.03 a 32.80±3.13 a 17.60±2.50 b Zn/(mg·kg−1) 149.00±7.05 b 263.30±31.80 a 227.70±8.37 a 237.20±11.00 a 232.00±27.20 a 80.90±4.09 c Hg/(mg·kg−1) 0.05±0.01 c 0.04±0.001 c 0.09±0.01 b 0.09±0.01 b 0.04±0.00 c 0.13±0.00 a As/(mg·kg−1) 4.85±0.23 b 3.82±0.37 c 6.17±0.04 a 6.60±0.24 a 3.82±0.37 c 2.58±0.24 d 注:同行数据后不同小写字母表示处理间差异显著(P<0.05)。表3同。
Note: Data with different lowercase letters indicate significant difference among treatments at P<0.05. The same as Table 3.表 2 室内SRC处理对土壤细菌多样性的影响
Table 2. Effects of SRC on microbial diversity in pot soil
样本 Samples Simpson Chao1 ACE Shannon CK(2017) 0.994 b 1 072.0 b 1 147.4 b 8.91 b CK(2018) 0.997 a 1 223.8 ab 1 339.8 ab 9.32 a 1%SRC 0.997 a 1 323.0 a 1 451.7 a 9.36 a 5%SRC 0.996 a 1 208.7 ab 1 333.1 ab 9.17 ab 10%SRC 0.997 a 1 264.1 a 1 404.5 a 9.28 a 20%SRC 0.997 a 1 334.3 a 1 464.7 a 9.38 a 注:同列数据后不同小写字母表示差异显著(P < 0.05)。表4同。
Note: Data with different lowercase letters indicate significant difference among treatments at P<0.05. The same as Table 4.表 3 SRC处理对茶园土壤pH值和重金属含量的影响
Table 3. Effects of SRC on pH and heavy metals in soils at tea plantations
指标 Index CK 2018 CK 2019 SRC pH 5.40±0.12 b 5.49±0.25 b 6.23±0.14 a Cd/(mg·kg−1) 0.16±0.01 a 0.17±0.01 a 0.10±0.01 b Cr/(mg·kg−1) 74.60±4.73 ab 78.30±5.31 a 63.30±2.65 b Pb/(mg·kg−1) 88.00±4.57 ab 102.10±10.41 a 82.20±2.90 b Cu/(mg·kg−1) 126.40±4.30 a 149.40±11.26 a 97.30±5.19 b Ni/(mg·kg−1) 83.20±4.16 a 84.90±10.45 a 68.18±6.13 b Zn/(mg·kg−1) 320.80±8.64 a 307.30±24.91 a 159.60±14.20 b Hg/(mg·kg−1) 0.06±0.01 a 0.06±0.01 a 0.04±0.01 b As/(mg·kg−1) 8.15±0.30 a 9.46±0.48 a 5.89±0.95 b 表 4 SRC处理对茶园土壤细菌多样性的影响
Table 4. Effects of SRC on microbial diversity in soils at tea plantations
样本 Sample Simpson Chao1 Shannon CK 2018 0.954 a 482.5 c 6.33 c CK 2019 0.972 a 1699.7 b 7.64 b SRC 0.997 a 3077.0 a 9.89 a -
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