ASSESSMENT OF SOIL AGGREGATE STABILITY METHODOLOGIES IN CALCAREOUS SILT LOAMS

被引:1
|
作者
Yost, Jenifer L. [1 ]
Kruger, Kevin [2 ]
Bjorneberg, David L. [3 ]
Dungan, Robert S. [3 ]
Leytem, April B. [3 ]
Moore, Amber D. [4 ]
Schott, Linda R. [2 ]
机构
[1] USDA ARS, Grassland Soil & Water Res Lab, Temple, TX 76501 USA
[2] Univ Idaho, Twin Falls Res & Extens Ctr, Dept Soil & Water Syst, Twin Falls, ID USA
[3] USDA ARS, Northwest Irrigat & Soils Res Lab, Kimberly, ID USA
[4] Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR USA
来源
JOURNAL OF THE ASABE | 2024年 / 67卷 / 04期
关键词
Agricultural management practices; Calcareous soils; Mean weight diameter; Slake test; Soil aggregate stability; DAIRY-CATTLE MANURE; COVER CROPS; IMPACT; CARBON; TILLAGE; QUALITY; FURROW; IRRIGATION; INDICATORS; MANAGEMENT;
D O I
10.13031/ja.15650
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
. Idaho's Magic Valley is a highly productive agricultural region in the United States due to irrigation. The soils in this region are prone to crusting, have low organic matter, and are high in calcium carbonates, making them susceptible to erosion and water runoff. Soils need to be better managed to enhance aggregate stability to enable increased infiltration of irrigation water and decreased soil erosion in nearby waterways. However, to make management recommendations, the identification of appropriate measurements of aggregate stability needs to be identified, and few relevant studies exist. Thus, the overall goal of this project was to identify appropriate methods for the assessment of soil aggregate stability in the study region. The study sites were located in Southern Idaho and set up using common cropping rotations and agricultural management practices for the region using a variety of nutrient sources, tillage types, and cover cropping. Three methods were used to measure soil aggregate stability: wet sieving, simulated rainfall using a Cornell Sprinkle Infiltrometer (sprinkler height: 30, 90, and 150 cm), and the SLAKES mobile application. No differences in soil aggregate stability were found when the wet sieving or SLAKES methods were used at the three study sites, either due to the method or a general lack of differences between treatments. When using the Cornell Sprinkle Infiltrometer, no treatment differences were found at LT-Manure or GRACEnet; however, differences were observed between treatments at the Cover Crop study site at sprinkler heights of 30 and 90 cm. At a sprinkler height of 30 cm, the average mean weight diameter was the highest when winter forage crops (WFC) and solid dairy manure (SDM) were applied (3.73 mm) and the lowest in the control (3.12 mm). At a sprinkler height of 90 cm, the average mean weight diameter was the highest when WFC and SDM were applied (3.54 mm) and the lowest in the WFC Only treatment (2.46 mm). These results not only have implications for which methods are best for assessing progress but also for what management practices can be utilized to decrease soil erosion from irrigated cropland. This study highlighted that under these soils and management practices, simply increasing soil carbon does not increase aggregate stability, especially when root crops are included in the crop rotation with intensive tillage. In arid and semi-arid regions, the Cornell Sprinkle Infiltrometer may be a more sensitive method of measuring soil aggregate stability compared to traditional wet sieving.
引用
收藏
页码:879 / 887
页数:9
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