The Effect of Alfalfa Mineral Fertilization and Times of Soil Sampling on Enzymatic Activity

Autor: Barbara Symanowicz, Marcin Becher, W. Skorupka, Sebastian Krasuski, Dawid Jaremko
Rok vydání: 2021
Předmět:
Zdroj: Agronomy, Vol 11, Iss 1335, p 1335 (2021)
Agronomy
Volume 11
Issue 7
ISSN: 2073-4395
DOI: 10.3390/agronomy11071335
Popis: This study examined changes in soil enzymatic activity caused by constant mineral fertilization with NPK and diversified fertilization with Fe and Mo micronutrients. A field experiment was conducted in a completely randomized design with four replications in Siedlce (central-eastern Poland) between 2012 and 2014. Alfalfa (Medicago sativa L.) was used as the test plant. The first factor consisted of fertilization treatments: control
NPK
NPKFe1
NPKMo1
NPKFe1Mo1
NPKFe2
NPKMo2, and NPKFe2Mo2. The second factor was composed of the time of soil sampling (15 August 2012, 20 September 2012, 17 June 2013, and 20 July 2014). Mineral fertilization was applied: N-20
P-22
K-124.5
Fe1-0.5
Mo1-0.5
Fe2-1.0
Mo2-1.0 kg ha−1. Application of molybdenum (Mo2-1.0 kg ha−1) in alfalfa fertilized with NPK was optimal for obtaining the beneficial nitrogenase activity. The applied NPKFe1Mo1 fertilization in alfalfa cultivation was optimized to achieve high dehydrogenases activity, alkaline phosphatase activity, and acid phosphatase activity. The highest of soil urease activity was determined in soil fertilized with NPKFe2Mo2. The biochemical index (BCHI) of soil fertility reached its highest mean value (254.9) after applying the NPKFe1Mo1. A high BCHI soil fertility index indicates the possibility of generating high alfalfa yields and maintaining good soil culture.
Databáze: OpenAIRE
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