Changes of crops productivity and soil agrochemical parameters during the ninth cycle of crop rotation in a long-term field fertilization experiment

Titova, V.I.; Varlamova, L.D.; Tyurnikova, E.G.; Arkhangelskaya, A.M.; Nefed'eva, V.V.

Agrokhimiya (7): 25-32

2013


ISSN/ISBN: 0002-1881
Accession: 066149530

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Abstract
Long lasting application of fertilizers in a long-term field experiment has shown that crop productivity significantly changed in the 9th cycle of crop rotation; the minimum variability was characteristic for the unfertilized control and the treatment with phosphoric fertilizers, and the maximum variability was typical for the treatment with complete mineral fertilizer. On the unlimed soil, the productivity of arable land varied among the treatments from 1.39 (control) to 2.09 t g.u./ha (NPK); on the limed soil, it varied from 1.52 to 2.30 t g.u./ha, respectively. The application of fertilizers (N34P39K39) has provided an intensive balance of phosphorus at the deficiency of nitrogen and potassium. Liming increased the utilization coefficients of N and Р from fertilizers, which exceeded the statistical average data at the application of complete mineral fertilizer. The long-term application of fertilizers had no effect on the humus content and exchangeable acidity of soil. The maximum content of mobile phosphorus and potassium forms has been revealed at the simultaneous application of manure and complete mineral fertilizer. Liming decreased the acidity and increased the accumulation of mobile phosphorus forms in the soil.