Ecosystemic effects of the fertilization with K and Mg at the afforestation of agricultural lands. Results of many year experiments
1997
Eberhard, Uebel (Kali und Salz Kassel, Fachgebiet Forstwirtschaft (Germany))
The results of many years experiments for fertilization of pine at the afforestation of agricultural lands in the plain of the North-East part of Germany show the necessity of fertilization with K and Mg on sandy soils, with low capacity of absorption, poor in organic matter. The fertilization with K and Mg done in young stadium of pine proved to be efficient and significant in a forest stand of pine of 60 year old. The improvement of total growth of wood was up to 129 mc/ha, respectively 26 percent, and shows an important effect of fertilization with K and Mg. In another older experiments the effect was even bigger and reached an increment till to 93 percent. By the danger of eutrophization of the site caused by the loss of atmogenic N the fertilization with K and Mg acts against the loss of cations of the soils and assures the equilibrium of nutrients. The fertilization with K and Mg is an important measure for the success of turning into forest of the sites which were used as agricultural land. So the fertilization with K and Mg improves the growth in height of beech. The fertilization with K and Mg supplies biogenic tied N and helps to the turning of atmogenic N into an increased biomas production. So it is avoid the loss of N in ground water.
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