Nitrous oxide and carbon dioxide emissions during initial decomposition of animal by-products applied as fertilisers to soils
Nitrous oxide and carbon dioxide emissions during initial decomposition of animal by-products applied as fertilisers to soils
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DOI：
10.1016/j.geoderma.2010.04.026
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发表时间：
2010-07-15
期刊：
影响因子：
6.1
通讯作者：
van Groenigen, J. W.
中科院分区：
文献类型：
--
作者：
Cayuela, M. L.;Velthof, G. L.;van Groenigen, J. W.
有机废物作为土壤改良剂的回收利用在可持续农业系统中得到了显著促进。然而，对于有机农业法规批准的许多动物副产品，人们对其对土壤温室气体平衡的影响，特别是对N(2)O排放的影响知之甚少。在这项工作中，我们报告了六种动物来源的废物(角和蹄粉、血粉、水解革、肉骨粉、鸡粪和一种商业有机混合肥料)的N(2O)O和CO(2)排放情况。在三个月的实验室培养研究中，我们将这些排放量与沙土和壤土中的矿物质化肥(硝酸钙)的排放量进行了比较。N(2)O通量动态随残留物种类和土壤类型的不同而变化较大。沙地土壤N(2)O累积排放量与土壤NO(3)(-)含量呈正相关。虽然矿物肥产生的总N(2)O排放量最高(5.7 mg N(2)O-N kg(-1)土壤)，但商业有机肥混合物导致的排放量在统计上相似(5.3 mg N(2)O-N kg(-1)土壤)。其他副产物排放在1.3~3.0 mg N(2)O-N kg(-1)土壤，只有血粉排放小于1 mg N(2)O-N kg(-1)土壤。在壤土里。N(2)O排放量从未超过1.0 mg N(2)O-N kg(-1)，且与土壤中的NO(3)(-)不相关。在CO(2)排放和碳储存潜力方面，鸡粪是在试验过程中两种土壤中唯一显著积累C的残留物。添加特别容易获得的C(葡萄糖)或N(NO(3)(-))源对N(2)O排放的影响因所用残留物的不同而不同。我们的结果表明，尽管在有机改良剂中添加了额外的C，但动物粪便的N(2)O排放量永远不会高于矿物肥料的排放量。(C)2010爱思唯尔B.V.保留所有权利。
The recycling of organic wastes as soil amendments is notably promoted in sustainable agricultural systems. However, for many animal by-products approved by organic farming regulations little is known about their effects on the greenhouse gas balance of the soil, in particular on N(2)O emissions. In this work we report on the N(2)O and CO(2) emissions from six animal-derived wastes (horn and hoof meal, blood meal, hydrolysed leather, meat bone meal, chicken manure and a commercial organic mixed fertiliser). We compared these emissions to those from a mineral fertiliser (calcium ammonium nitrate) in a sandy and a loam soil during a three month laboratory incubation study. N(2)O flux dynamics varied strongly with residue category and soil type. In the sandy soil, cumulative N(2)O emissions correlated with soil NO(3)(-) content. Although the mineral fertiliser produced the highest total N(2)O emissions (5.7 mg N(2)O-N kg(-1) soil), the commercial organic fertiliser mixture led to statistically similar emissions (5.3 mg N(2)O-N kg(-1) soil). The other by-products emitted between 1.3-3.0 mg N(2)O-N kg(-1) soil, and only blood meal emitted less than 1 mg N(2)O-N kg(-1) soil. In the loam soil. N(2)O emissions never exceeded 1.0 mg N(2)O-N kg(-1) soil, and did not correlate with NO(3)(-) in soil. With regard to CO(2) emissions and C storage potential, chicken manure was the only residue that significantly accumulated C in both soils during the course of our experiment. The addition of an extra easily available source of C (glucose) or N (NO(3)(-)) influenced N(2)O emissions differently depending on the residue applied. Our results showed that despite the extra amount of C added with the organic amendments, N(2)O emissions from animal-derived wastes were never higher than those from the mineral fertiliser. (C) 2010 Elsevier B.V. All rights reserved.