Assessing how cover crops close the soil health gap in on-farm experiments

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY
Fernanda Souza Krupek, Steven Mugisha Mizero, Daren Redfearn, Andrea Basche
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引用次数: 2

Abstract

Assessing the success of cover crops (CCs) as a way to promote soil health at the farm scale remains a challenge. At four on-farm CC experiments in Nebraska, we quantified soil health relative to a reference soil. We examined physical, chemical, and biological properties in near-surface soil. Cover crops reduced the soil health gap between bare (no-CC) and reference soil in the short (3-yr) timescale, but the magnitude of responses depended on cropland management history and ecological dynamics of reference site plant communities. Increases in soil health relative to reference soils showed some relationship to increases in soybean [Glycine max (L.) Merr.] and corn (Zea mays L.) yields. Clear discrimination of reference from bare soils was most influenced by organic matter and infiltration measurements conducted under the highest sampling intensity. Framing soil metrics relative to reference soils and ensuring appropriate sampling intensity are important to quantify the effects of CC on farm landscapes.

Abstract Image

在农场试验中评估覆盖作物如何缩小土壤健康差距
在农场规模上评估覆盖作物作为促进土壤健康的一种方式的成功仍然是一个挑战。在内布拉斯加州的四个农场CC试验中,我们量化了相对于参考土壤的土壤健康状况。我们研究了近地表土壤的物理、化学和生物特性。覆盖作物在短(3年)时间尺度上缩小了裸地(未覆盖)和参考土壤之间的土壤健康差距,但响应幅度取决于农田管理历史和参考地植物群落的生态动态。与对照土壤相比,土壤健康水平的提高与大豆[甘氨酸max (L.)]含量的增加有一定的关系。稳定。和玉米(Zea mays L.)产量。在最高采样强度下进行的有机质和入渗测量对裸地参考土壤的明确区分影响最大。相对于参考土壤制定土壤指标并确保适当的采样强度对于量化CC对农场景观的影响非常重要。
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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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