Soil Penetration Resistance and Sugarcane Rooting Under Subsuperficial Drip Irrigation Levels

Autor: Ronaldo S. Resende, Fernando L. D. Cintra, Edson Patto Pacheco, Júlio R. A. de Amorim, Renata S. B. Gomes, Sandra M. da Silva
Rok vydání: 2022
Předmět:
Zdroj: Sugar Tech. 25:99-109
ISSN: 0974-0740
0972-1525
Popis: Knowledge of the soil water regime in a dynamic equilibrium condition (steady state) of the emitter–soil–plant system is essential to evaluate the adopted irrigation management, aiming to maximize the water use efficiency in irrigation. Thus, our objective was to determine the integrated effect of four irrigation levels on the soil moisture (θv) distribution pattern, mechanical soil penetration resistance (PR), and sugarcane rooting. Irrigation levels were established based on the percentage of reference evapotranspiration (ETo), as follows: 40% (W1), 70% (W2), 100% (W3), and 130% (W4) of ETo. From the soil moisture profile and PR versus θv regression models, PR profiles for each irrigation level were estimated. At the end of the crop cycle, trenches were opened to assess sugarcane root system. According to the results, the water dynamic in the soil profile resulted in a soil-wetting pattern that did not match the sugarcane rooting profile. For treatments W3 and W4 the wetting pattern indicated water loss through deep percolation. For all treatments and considering the entire soil profile, the PR values ranged from
Databáze: OpenAIRE
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