Composts with wood ash addition: A risk or a chance for ameliorating acid tropical soils?
Composts with wood ash addition: A risk or a chance for ameliorating acid tropical soils?
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添加木灰的堆肥：改善酸性热带土壤的风险还是机会？
DOI：
10.1016/j.geoderma.2009.09.003
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发表时间：
2009
期刊：
影响因子：
6.1
通讯作者：
H. Insam
中科院分区：
文献类型：
--
作者：
B. Bougnom;J. Mair;F. Etoa;H. Insam
在旨在评估使用木灰改良堆肥对热带酸性土壤的潜在风险的框架内，进行了温室实验，两种酸性土壤（Oxisol和Ultisol）从喀麦隆收集，并与三种类型的堆肥3：1（w/w），分别与0，8和16%的木灰制备堆肥前进行修正。以大豆（Glycine max L.）100D。有机废弃物堆肥的添加增加了土壤pH、有机质、持水力、EC、全C和全N。交换性Al和NH 4 +-N含量下降，NO3--N和P含量上升。交换性阳离子（Ca、Mg、Na、K）和微量元素（Zn、Cu）含量增加，Fe、Mn含量降低。处理土壤的C/N比范围为12至14。灰堆肥处理土壤pH值、Fe和Mn含量较高，EC和硝态氮含量较低。8%的灰分添加剂对堆肥的效果最好。土壤交换性铝含量在不加灰的堆肥处理中降低最多。植物生物量的生产没有显着提高堆肥的修正案。这种缺乏影响可能是由于土壤pH值（>7.7）超过了大豆的最佳pH值（6.2）。总结的结果，堆肥与灰分添加可以起到改善酸性热带土壤的目的，虽然最佳的修正率仍需要在未来的研究中解决。
Within the framework aiming at assessing the potential risk of the use of wood ash amended composts to tropical acid soils, a greenhouse experiment was conducted with two acid soils (Oxisol and Ultisol) collected from Cameroon and amended with three types of compost 3:1 (w/w) prepared with 0, 8 and 16% wood ash prior to composting, respectively. They were planted with soybean (Glycine max L.) for 100d. Addition of organic waste composts increased soil pH, SOM, WHC, EC, total C and N. Concentrations of exchangeable Al and NH4+–N decreased while those of NO3−–N and phosphorous increased. The exchangeable cation (Ca, Mg, Na and K) and micronutrient (Zn and Cu) concentrations increased while concentrations of Fe and Mn decreased. The C/N ratio of treated soils ranged from 12 to 14. Soil pH, concentrations of Fe and Mn were higher; EC and nitrate concentration were lower under ash compost amendment. Eight percent ash amendment to compost yielded best results in many aspects. Concentration of exchangeable Al was most decreased in soils treated with compost without ash. Plant biomass production was not significantly enhanced by compost amendment. This lack of an effect may be attributed to a soil pH (>7.7) beyond the optimum for soybean (6.2). Summarising the results, composts with ash addition could serve the purpose of ameliorating acid tropical soils, albeit the optimal amendment rates still need to be addressed in future research.