Assessment of the soil structure stability focusing on the high-energy moisture characteristic curve in pasture and arable land uses in semi-arid areas, northeastern Iran

IF 2 4区农林科学 Q2 AGRONOMY International Agrophysics Pub Date : 2023-11-27 DOI:10.31545/intagr/174500

F. Samaei, H. Emami, Amir Lakzian

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Abstract

. Investigating the effects of land use on soil structure in order to prevent the ever-increasing risks of soil degradation is important. The objective of this study was to compare the stability of soil structure using different methods in pasture and arable land uses in northeastern Iran. Soil samples were collected from a depth of 0-20 cm at two sites including pasture and arable land uses. Soil structure stability was determined using tensile strength, soil friability and Dexter’s number by focusing on the high-energy moisture characteristic curve procedure. The results showed that there were significant differences between the values of modal suction (p < 0.05), volume drainable pores, structural index and stability ratio, the aggregate stability index of the high-energy moisture characteristic curve method (p < 0.01), and Dexter’s number (p < 0.01) in pasture and arable land uses. In addition, the difference (p < 0.01) between the values of particulate organic matter in both land uses was significant. In arable land use, stability ratio, particulate organic matter and clay were found to be 10.9, 41.7, and 4.9% less than in pasture land use, respectively, and Dexter’s number was found to be 63.1% more than in pasture land use. Considering that the value of stability ratio in pasture land use (0.5345) was significantly greater than that in arable land use (0.4761) and the value of Dexter’s in arable land use (122.68) was significantly greater than that in pasture land use (75.20), it may be concluded that the stability of the soil structure in pasture land use is greater than that in arable land use. Also, according to the results obtained, it may be asserted that the high-energy moisture characteristic curve method and Dexter’s number are suitable methods for the evaluation of the stability of the soil structure in lands with similar characteristics to those of the study area used in this research.

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以伊朗东北部半干旱地区牧场和耕地的高能水分特征曲线为重点，评估土壤结构的稳定性

.调查土地利用对土壤结构的影响对于防止日益严重的土壤退化风险非常重要。本研究旨在比较伊朗东北部使用不同方法的牧场和耕地土壤结构的稳定性。在包括牧场和耕地在内的两个地点采集了 0-20 厘米深的土壤样本。土壤结构稳定性是通过拉伸强度、土壤易碎性和德克斯特数来确定的，重点是高能水分特征曲线程序。结果表明，牧场和耕地的模态吸力值（p < 0.05）、可排水孔隙体积、结构指数和稳定比、高能水分特征曲线法的集聚稳定指数（p < 0.01）以及 Dexter 数（p < 0.01）之间存在显著差异。此外，两种土地利用方式的颗粒有机物值差异显著（p < 0.01）。在耕地中，稳定性比、颗粒有机物和粘土分别比牧场少 10.9%、41.7%和 4.9%，而 Dexter 数字则比牧场多 63.1%。考虑到牧草地的稳定性比值（0.5345）明显大于耕地的稳定性比值（0.4761），耕地的 Dexter's 值（122.68）明显大于牧草地的 Dexter's 值（75.20），可以得出牧草地土壤结构的稳定性大于耕地的结论。此外，根据所获得的结果，可以断言高能水分特征曲线法和德克斯特数是评价与本研究区域特征相似的土地土壤结构稳定性的合适方法。

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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.