| 摘要: |
| 【目的】研究热带农业废弃物对橡胶园土壤酸度的影响，为利用农业废弃物延缓和修复土壤酸化提供理论依据。【方法】用室内培养试验(25 ℃恒温培养70 d)研究在橡胶园土壤中分别添加15和45 g/kg椰糠、香蕉假茎、橡胶木屑、蔗渣4种农业废弃物，对橡胶园土壤pH、交换性酸、交换性盐基、无机氮含量的影响，以不添加任何农业废弃物为对照。【结果】添加量为15和45 g/kg时，4种农业废弃物处理土壤pH的变化趋势基本一致，除椰糠外，香蕉假茎、橡胶木屑、蔗渣均可明显提高土壤pH，其对土壤pH的提升效果表现为香蕉假茎>橡胶木屑>蔗渣>椰糠。香蕉假茎、橡胶木屑、蔗渣均降低了土壤交换性酸和交换性铝含量，而椰糠提高了土壤交换性酸含量。添加量为15和45 g/kg时，4种农业废弃物均增加了土壤交换性盐基总量。【结论】添加量为45 g/kg时，4种农业废弃物对橡胶园土壤酸度的影响较大，其影响大小顺序为香蕉假茎＞橡胶木屑＞蔗渣＞椰糠。 |
| 关键词: 热带 农业废弃物 橡胶园 土壤酸度 |
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| 基金项目:海南省应用技术研发与示范推广专项（ZDXM2015054）；中国热带农业科学院橡胶研究所基本科研业务费专项（1630022013006） |
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| Effects of tropical agricultural wastes on soil acidity in rubber plantation |
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WU Min,WEI Jiashao,SUN Haidong,et al
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| Abstract: |
| 【Objective】The effects of tropical agricultural wastes on soil acidity of rubber plantation were studied to provide theoretical basis for delaying and repairing soil acidity using tropical agricultural wastes.【Method】The effects of coco coir(CC),banana pesudostem (BPS),rubber wood chips (RWC) and cane trash (CT) under two levels of 15 g/kg and 45 g/kg on pH,exchangeable acidity,exchangeable base,and inorganic nitrogen in rubber plantation soil were studied using constant incubation experiment at temperature of 25 ℃ for 70 days.No addition of agricultural waste was used as control.【Result】The change of soil pH was consistent with different agricultural wastes at the levels of 15 and45 g/kg.BPS,RWC and CT except CC significantly increased pH with the order of BPS>RWC>CT>CC.BPS,RWC and CT decreased contents of soil exchangeable acidity (EA) and aluminum (E-Al),while CC increased EA contents.Contents of exchangeable base ions(E-BI) were increased by all wastes.【Conclusion】The influence of agricultural wastes on soil acidity was great at level of 45 g/kg,and the order of f improving effects on soil acidity were BPS>RWC>CT>CC. |
| Key words: tropic agricultural waste rubber plantation soil acidity |
