The effect of straw mulch and compost application on the soil losses in potatoes cultivation

Abstract

The study aimed to evaluate the effect of the straw mulch and compost application on the soil losses in potatoes cultivation. The three-year (2016–2018) exact field plot trials with the potato cv. Dicolora was carried out at the experimental station in Prague-Uhříněves. Wheat straw mulch in two doses 2.5 t/ha (SM1) and 4.5 t/ha (SM2) was applied on the soil surface; the compost in a dose of 20 t/ha (CM) was shuffled to the surface soil layer. Both straw mulch and compost application contributed to the significant reduction of the soil losses compared to control untreated (C). In the average of 2016–2018, the lowest soil loss 17.54 g/m2 (amount of the soil sediment caught) was found for the variant with the straw mulch treatment (SM2); it means the decrease of soil losses by 71.9% compared to C. Variant SM1 (lower rate of straw mulch in dose 2.5 t/ha) showed the soil loss 18.6 g/m2 (the decrease by 70.2% compared to C). The similar results for both variants indicate that for effective soil protection, it is not necessary to use the high doses of the straw mulch. Regarding the distribution of precipitation during the vegetation season, intensive precipitation during the short time, especially when they came after the longer period of drought led to higher soil losses compared to the precipitation distributed regularly.