The yield of radish (Raphanus sativus L.) cultivated on fertilized and on non–fertilized soil
2017
Kováčik, Peter | Panáková, Zuzana | Kolenčík, Marek
The information about crop growing without the usage of fertilizers – industrial or organic fertilizers – shifts the humankind back by several centuries from the aspect of the yield quantity, which is well–known for many years. In spite of this fact we encounter the view of the bio–agriculturist and eco–agriculturist about the harmfulness of the industrial fertilizers and composts. Therefore we established the experiment with two soils. The fi rst type consisted of the soil sampled from the continuously cultivated and fertilized fi eld where no nutrients were added and the second type of the same soil where the vermicompost was added. Radish was grown in these two types of soil. On the soil without the vermicompost unsaleable radish was grown with the average root weight lower than 2 to 2.8 g and the average root size of 1.44 to 1.68 cm, which is a lesser size than allowed by the Slovak technical norms 46 3120 for radish grown in the fi eld conditions. The small roots grown in the soil without vermicompost had signifi cantly lower content of nitrates and a little higher content of vitamin C compared with the marketable roots grown in the variant with the soil containing one tenth proportion of vermicompost. The roots of both variants contained less vitamin C and more nitrates than leaves, which is the evidence of the reasonable consumption of radish leaves used in the Asian and African countries and also of the opportunity to re–evaluate the opinion of the Slovaks to consume radish leaves.
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