Influence of no-till cover crops on the physical and hydraulic properties of a Paleudult

IF 2 4区农林科学 Q2 AGRONOMY

International Agrophysics Pub Date : 2023-05-23 DOI:10.31545/intagr/162799

Samuel I. Haruna, Zoey A. Ward, Ashlen L. Cartwright, Avie A. Wunner

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Abstract

. The influence of a single species cover crop on soil hydraulic properties during one growing season are well known. However, the influence of multi-year and multi-species cover crops on soil physical and hydraulic properties are not yet fully understood. The current study was set up using a completely randomized block design during 2021 and 2022, it investigated the effects of a multi-species cover crop (winter wheat ( Triticum aestivum L.), crimson clover ( Trifolium incarnatum L.), triticale ( Triticale hexaploide Lart), hairy vetch ( Vicia villosa ), oats ( Avena sativa ), and cereal rye ( Secale cereale L.)) on bulk density, soil organic carbon, saturated hydraulic conductivity, pore-size distribution, and volumetric water content at 0, -0.4, -1, -2.5, -5, -10, -20, -33, -100, and -1 500 kPa soil water pressures. The soil samples were collected in 10 cm increments from the soil surface down to 30 cm. After 2 years, the results showed that cover crop reduced bulk density by 17% as compared with no cover crop management. Further, the cover crop-induced increases in soil organic carbon as well as in macro- and mesoporosity led to 23, 25, and 28% increases in volumetric water content at 0, -33, and -100 kPa soil water pressures respectively, relative to no cover crop management. When comparing the two years of the study, under cover crop management alone, saturated hydraulic conductivity was higher in 2021 as compared to 2022, which suggests that cover crop-induced improvements in some hydraulic properties may not be proportional over time. In general, cover crops improved the measured soil hydraulic properties after 2 years and this has the potential to be beneficial for improving soil water storage.

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免耕覆盖作物对黄土高原物理和水力特性的影响

在一个生长季节，单一物种覆盖作物对土壤水力特性的影响是众所周知的。然而，多年和多物种覆盖作物对土壤物理和水力特性的影响尚不完全清楚。目前的研究是在2021年和2022年使用完全随机的块区设计建立的，它研究了多物种覆盖作物（冬小麦（Triticum aestivum L.）、深红色三叶草（Trifolium incarnatum L.），小黑麦（triticale hexaploide Lart）、毛豌豆（Vicia villosa）、燕麦（Avena sativa）和谷类黑麦（Secale cereale L.））对体积密度的影响，0、-0.4、-1、-2.5、-5、-10、-20、-33、-100和-1 500 kPa土壤水压下的土壤有机碳、饱和导水率、孔径分布和体积含水量。从土壤表面到30厘米，以10厘米为增量采集土壤样本。2年后，结果表明，与无覆盖作物管理相比，覆盖作物降低了17%的体积密度。此外，与无覆盖作物管理相比，覆盖作物引起的土壤有机碳以及宏观和中等孔隙度的增加导致0、-33和-100 kPa土壤水压下的体积含水量分别增加23%、25%和28%。当比较两年的研究时，仅在覆盖作物管理下，2021年的饱和导水率高于2022年，这表明覆盖作物引起的某些水力特性的改善可能与时间不成正比。一般来说，覆盖作物在2年后改善了测量的土壤水力特性，这有可能有利于改善土壤蓄水。

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来源期刊

International Agrophysics 农林科学-农艺学

CiteScore

3.60

自引率

9.10%

发文量

审稿时长

3 months

期刊介绍： The journal is focused on the soil-plant-atmosphere system. The journal publishes original research and review papers on any subject regarding soil, plant and atmosphere and the interface in between. Manuscripts on postharvest processing and quality of crops are also welcomed. Particularly the journal is focused on the following areas: implications of agricultural land use, soil management and climate change on production of biomass and renewable energy, soil structure, cycling of carbon, water, heat and nutrients, biota, greenhouse gases and environment, soil-plant-atmosphere continuum and ways of its regulation to increase efficiency of water, energy and chemicals in agriculture, postharvest management and processing of agricultural and horticultural products in relation to food quality and safety, mathematical modeling of physical processes affecting environment quality, plant production and postharvest processing, advances in sensors and communication devices to measure and collect information about physical conditions in agricultural and natural environments. Papers accepted in the International Agrophysics should reveal substantial novelty and include thoughtful physical, biological and chemical interpretation and accurate description of the methods used. All manuscripts are initially checked on topic suitability and linguistic quality.