食物林凋落物大小、种类和凋落物质量对凋落物分解的影响

IF 2.2 3区 农林科学 Q2 AGRONOMY
Isabelle van der Zanden, Gelieke G.T. Steeghs, Lieke Moereels, G. F. Ciska Veen
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引用次数: 0

摘要

粮食森林是多年生、多层次的粮食生产系统,作为集约化、依赖投入的农业的替代品而日益受到欢迎。由于外部投入的使用有限,这些系统依靠通过凋落物分解的养分循环来提供植物养分。然而,人们对食物林发育过程中的分解动力学知之甚少。本文研究了桤木凋落物在生长过程中Gaertn。黑桤木;黑桤木;(普通榛子)和蓖麻。在草地上种植的食物林与邻近草地相比,落叶质量高到低的甜板栗的分解情况。利用不同孔径的凋落物袋,我们评估了微生物、微型、中型和大型动物对短期凋落物质量损失的相对贡献。我们还量化了关键分解者群体的丰度和生物量。不同土地利用类型的分解者群落存在差异,食物林的甲螨丰度较高,但蚯蚓和丛枝菌根真菌的丰度和生物量低于草地。我们发现,不同凋落物系统之间的凋落物质量损失差异不大,除了当整个分解者群落都可以获得凋落物时,草地上的优质凋落物质量损失更高。质量最差的板栗凋落物分解最慢,分解速率不受网目大小和土地利用方式的影响。总体而言,优质凋落叶在草地上的分解速度一般快于食物林,而幼嫩食物林中不同的分解者群落不利于(顽固)凋落叶的分解。未来的研究可以探索这些发现对自给农业生态系统中植物养分供应的潜在影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The impact of decomposer size classes and litter quality on litter decomposition in food forests

Food forests are perennial, multi-layered food production systems gaining popularity as alternatives to intensive, input-dependent agriculture. With limited use of external inputs, these systems rely on nutrient recycling via litter decomposition for plant nutrient supply. However, little is known about decomposition dynamics during food forest development. We studied how litter of Alnus glutinosa (L.) Gaertn. (black alder), Corylus avellana (L.) (common hazel) and Castanea sativa Mill. (sweet chestnut) (high to low litter quality) was decomposed in food forests planted on grasslands versus neighboring grasslands. Using litter bags with varying mesh sizes, we assessed the relative contribution of microbes, micro-, meso- and macrofauna on short-term litter mass loss. We also quantified abundance and/or biomass of key decomposer groups. Decomposer communities differed between the land use types, with food forests harboring a higher abundance of oribatid mites, but a lower abundance and biomass of earthworms and lower biomass of arbuscular mycorrhizal fungi than grasslands. We found little differences in litter mass loss between the systems, except for a higher mass loss of high-quality litter in grasslands when the litter was accessible to the entire decomposer community. The lowest-quality (sweet chestnut) litter decomposed slowest and decomposition rates were neither impacted by mesh size nor land use. Overall, high-quality leaf litter generally decomposed faster in grasslands than food forests and the different decomposer communities in young food forests did not favor the breakdown of (recalcitrant) litter. Future research could explore the potential implications of these findings for plant nutrient provisioning in self-sustaining agroecosystems.

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来源期刊
Agroforestry Systems
Agroforestry Systems 农林科学-林学
CiteScore
5.30
自引率
9.10%
发文量
78
审稿时长
4.5 months
期刊介绍: Agroforestry Systems is an international scientific journal that publishes results of novel, high impact original research, critical reviews and short communications on any aspect of agroforestry. The journal particularly encourages contributions that demonstrate the role of agroforestry in providing commodity as well non-commodity benefits such as ecosystem services. Papers dealing with both biophysical and socioeconomic aspects are welcome. These include results of investigations of a fundamental or applied nature dealing with integrated systems involving trees and crops and/or livestock. Manuscripts that are purely descriptive in nature or confirmatory in nature of well-established findings, and with limited international scope are discouraged. To be acceptable for publication, the information presented must be relevant to a context wider than the specific location where the study was undertaken, and provide new insight or make a significant contribution to the agroforestry knowledge base
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