Biologically active substances in soils from under continuous rye cropping and crop rotation
2003
Szajdak, L. (Polska Akademia Nauk, Poznan (Poland). Zaklad Badan Srodowiska Rolniczego i Lesnego)
In the reported studies the observations on rye cultivated in continuous cropping were contrasted with the impact of continuous cropping of rye on the content of biologically active organic substances in soil. In soils under continuous cropping of rye, increased concentrations of various phenolic acids were found. These compounds are known as plant growth inhibitors. The negative effects of continuous cropping were manifested by lower seed sprouting and root growth. The investigations dealt with seasonal changes in contents of free and bound amino acids and amino acids bound to humic acids. Soils were fertilized with NPK and manure
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