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Publication Date
1977
Description
Long-term trials conducted on 70 systemati cally selected low-bog sites of the GDR have given the following results: With increasing thickness of the peat layer and declining ground-water levels the N mineralization rate in the low-bog soils rises up to 300 kg N/ha thus allowing a corresponding reduction of N fertilization. On half-bog and sandy gley soils yield increments of 2.4 and 4. 7 t DM/ha were reached by raising the groundwater level and by applying N fertilizers. When these factors coincided, a yield increment of 10.4 t DM/ha was obtained on account of the combining effect. The grass stands were found to. consume 500 mm of water to produce a yield of 10 t DM/ha. At ground-water levels of 50 to 60 cm and N rates of more than 200 kg/ha the soil series proved to be a minor factor of influence.
Citation
Waydbrink, Walter V.D, "Combining effect of ground-water level and nitrogen fertilization on grass yields on low-bog sites" (1977). IGC Proceedings (1977-2023). 54.
(URL: https://uknowledge.uky.edu/igc/1977/sess7/54)
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Combining effect of ground-water level and nitrogen fertilization on grass yields on low-bog sites
Long-term trials conducted on 70 systemati cally selected low-bog sites of the GDR have given the following results: With increasing thickness of the peat layer and declining ground-water levels the N mineralization rate in the low-bog soils rises up to 300 kg N/ha thus allowing a corresponding reduction of N fertilization. On half-bog and sandy gley soils yield increments of 2.4 and 4. 7 t DM/ha were reached by raising the groundwater level and by applying N fertilizers. When these factors coincided, a yield increment of 10.4 t DM/ha was obtained on account of the combining effect. The grass stands were found to. consume 500 mm of water to produce a yield of 10 t DM/ha. At ground-water levels of 50 to 60 cm and N rates of more than 200 kg/ha the soil series proved to be a minor factor of influence.
