Recycled Household Ash in Rice Paddies of Bangladesh for Sustainable Production of Rice Without Altering Grain Arsenic and Cadmium
Recycled Household Ash in Rice Paddies of Bangladesh for Sustainable Production of Rice Without Altering Grain Arsenic and Cadmium
复制标题
DOI：
10.1007/s12403-023-00539-y
复制
发表时间：
2023-02-09
影响因子：
6.7
通讯作者：
中科院分区：
文献类型：
--
作者：
在孟加拉国，大多数农业生物质（稻草、谷壳、干粪）被燃烧用于家庭烹饪。因此，土壤中的矿物质养分和碳（C）基质不断剥离。在这里，我们调查，如果回收家庭灰（灰）作为肥料可以持续提高土壤肥力，以及减少有毒元素（砷，镉）在稻米中的积累。在两个地理区域（Barind、Madhupur）和两个季节（湿、干）进行大规模田间试验，并施用3种肥料处理（NPKS、灰、NPKS +灰）。在每个季节结束时，区域 * 季节 * 处理对土壤微生物群落，水稻产量和粮食品质（砷，镉，营养元素）的影响进行了评估。与常规田间施用NPKS（对照）相比，施用灰使水稻产量提高了约10%。20%，在这两个地区在雨季和旱季，与水稻籽粒致癌的无机砷（iAs），二甲基胂酸（DMA）或镉（Cd）没有影响，但有可能增加锌（Zn）。土壤微生物群落表现出明显的区域和季节效应，并与水稻籽粒中的元素相关，其中Cd、Zn、iAs和DMA的含量最高。这项研究表明，施用灰可以减少对昂贵化肥的需求，同时提高水稻产量并保持谷物质量，使孟加拉国的农业更具可持续性和生产力。该研究还表明，区域，季节和土壤微生物的综合影响决定了水稻籽粒中元素的积累。在线版本包含补充材料，可通过10.1007/s12403-023-00539-y获得。
In Bangladesh most agronomic biomass (straw, husk, dried dung) is burnt for domestic cooking use. Consequently, the soil is continuously stripped of mineral nutrients and carbon (C) substrate. Here we investigate if recycling of household ash (ash) as fertilizer can sustainably improve soil fertility as well as minimise accumulation of toxic elements (As, Cd) in rice grain. Large scale field trials across two geographic regions (Barind, Madhupur) and two seasons (wet, dry) and with application of 3 fertiliser treatments (NPKS, ash, NPKS + ash) were conducted. At the end of each season, the impact of region*season*treatment on soil microbial comunities, rice yield, and grain quality (As, Cd, nutrient elements) was assessed. When compared to conventional field application rates of NPKS (control), application of ash boosted rice yield by circa. 20% in both regions during wet and dry season, with no effect on rice grain carcinogenic inorganic arsenic (iAs), dimethylarsonic acid (DMA) or cadmium (Cd), but with potential to increase zinc (Zn). For soil microbial communities, a significant region and season effect as well as correlation with elements in rice grain was observed, amongst these Cd, Zn, iAs and DMA. This study illustrates that application of ash can reduce the requirement for expensive chemical fertiliser, whilst at the same time increasing rice yield and maintaining grain quality, making farming in Bangladesh more sustainable and productive. The study also implies that the combined impact of region, season, and soil microbes determines accumulation of elements in rice grain. The online version contains supplementary material available at 10.1007/s12403-023-00539-y.