Impacts of tillage and nutrient management on soil porosity trends in dryland agriculture
نویسندگان
چکیده
In dryland Mediterranean semi-arid areas, the use of slurries and no-till are encouraged to reduce costs. This paper evaluates effect such practices in terms morphological changes topsoil porosity. The experiment had seven fertilization strategies (five them including pig applied at cereal sowing or tillering) combined with tillage by disc-harrowing sowing. Soil was classified as a Typic Xerofluvent. Texture silt loam. Pores apparent pore diameter (APD) intervals higher than >15 μm up 400 were studied micromorphological approach plus image analysis. Fifty-four undisturbed surface soil samples (0.06 m deep) analysed. Samples collected third year after establishment treatments throughout growing season: just before tillage, tillering grain maturity. incorporation slurry pre-sowing (~2 Mg ha−1 organic matter ha−1) enhanced porosity (>15 μm) 33% cropping season but mainly 200–400-μm class. Similar behaviour observed plots without topdressing fertilization, when till compared no-till. Thus, potential movement water nutrients due bypass flow increased. When only tillering, treatment increased maturity 15–100-μm class 22% and, thus, those pores responsible for storage. Temporary shape can be explained microstructure collapse compaction followed partial recovery faunal activity Highlights Slurry pre-sowing, increases coarse Tillage mesoporosity regardless strategy Pore not further visible No-till tends compact silty topsoils, creating platy structures later counteracted fauna
منابع مشابه
Soil Management and Tillage
Soil is one of our most precious natural resources. Proper soil management is a key to sustainable agricultural production. Soil management involves six essential practices: proper amount and type of tillage, maintenance of soil organic matter, maintenance of a proper nutrient supply for plants, avoidance of soil contamination, maintenance of the correct soil acidity, and control of soil loss (...
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ژورنال
عنوان ژورنال: European Journal of Soil Science
سال: 2021
ISSN: ['1365-2389', '1351-0754']
DOI: https://doi.org/10.1111/ejss.13139