期刊
PLANT SOIL AND ENVIRONMENT
卷 49, 期 12, 页码 531-535出版社
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/4189-PSE
关键词
potassium; fertilisation; availability; yield formation; potatoes; sugar beet; winter wheat
类别
The influence of an interrupted K fertilisation on different K fractions of the soil, yield formation and K uptake by different crops was investigated in a long-term field experiment on Luvisol derived from loess. Irrespective of the previous K fertilisation, the interruption of K fertilisation resulted in a sharp decline of CAL extractable K. K concentration in the saturation extract as well as HCl extractable K were reduced while K fixation capacity increased within 10 years after omitting K. Omitting K fertilisation decreased yields of sugar beet and potatoes while cereals were not affected, although K uptake of all crops reacted to the differentiated K supply to a different extent.
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