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首页> 外文期刊>Agriculture, Ecosystems & Environment: An International Journal for Scientific Research on the Relationship of Agriculture and Food Production to the Biosphere >Greater accumulation of soil organic carbon after liquid dairy manure application under cereal-forage rotation than cereal monoculture
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Greater accumulation of soil organic carbon after liquid dairy manure application under cereal-forage rotation than cereal monoculture

机译：谷物-牧草轮作后施用液态奶肥后，土壤有机碳的累积量比谷物单作更大

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摘要

As opposed to the well-known positive effect of solid animal manure on soil organic carbon (SOC) stocks, the effect of liquid animal manure is less clear. In addition, few long-term studies have measured the combined effects of animal manure application and management practices such as tillage or the inclusion of perennial forages in annual cropping systems on SOC stocks. The objective of this paper was to determine the response of SOC stocks along a 0-50 cm soil profile to 21 years of liquid dairy manure (LDM) application compared to mineral fertilizer in combination with two fall primary tillage practices (moldboard plowing vs. chisel plowing), and two crop rotations (cereal monoculture vs. cereal-perennial forage rotation) on a silty clay soil at Normandin, Quebec, Canada. The effects of LDM application on SOC stocks were apparent only in the top 20 cm of the 0-50 cm soil profile, with overall higher SOC stocks compared to mineral fertilizer. The magnitude of the LDM-induced change in SOC was also dependent on the crop rotation, with a 15% greater SOC accumulation in the 0-30 cm soil profile in the cereal-perennial forage rotation than in the cereal monoculture. The large retention of LDM-induced C under the cereal perennial forage rotation could be explained by (1) slower C decomposition resulting from the lower tillage frequency in the cereal-forage rotation (every three years) compared to the cereal monoculture (yearly operation), and/or (2) greater C stabilization promoted by the presence of a high-quality labile litter (perennial legume) in the rotation. We conclude that LDM-induced changes in SOC can be strongly modulated by the inclusion of perennial forages in annual cropping systems, and may not be just the consequence of manure characteristics. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.
机译：与众所周知的固体动物粪便对土壤有机碳（SOC）储量的积极作用相反，液体动物粪便的作用尚不清楚。另外，很少有长期研究测量出动物粪便施用和管理实践（例如耕作或年度种植系统中多年生牧草的纳入）对SOC储量的综合影响。本文的目的是确定与矿物肥料相结合的两种秋季初耕实践（刨花板耕作与凿子耕作）相比较，在0-50厘米土壤剖面上的SOC储量对施用21年液态乳牛粪（LDM）的响应。耕），并在加拿大魁北克省诺曼丁的粉质粘土上进行两次轮作（谷物单一栽培与谷物多年生牧草轮作）。 LDM施用对SOC的影响仅在0-50 cm土壤剖面的前20 cm才明显，与无机肥料相比，SOC总体较高。 LDM引起的SOC变化的幅度也取决于作物轮作，谷物多年生牧草轮作中0-30 cm土壤剖面中的SOC积累比谷物单一栽培大15％。谷物多年生牧草轮作下LDM诱导的C的大量保留可以解释为：（1）与谷物单一耕种（每年运行）相比，谷物牧草轮作（每三年）耕作频率较低，导致C分解较慢，和/或（2）旋转中存在高品质的不活动凋落物（多年生豆科植物）可促进更高的C稳定性。我们得出的结论是，LDM诱导的SOC变化可以通过在一年生作物系统中加入多年生草料来强烈调节，而这可能不仅仅是肥料特性的结果。官方版权（C）2016，由Elsevier B.V.保留所有权利。

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