Potassium dynamics in the soil and yield formation in a long-term field experiment

Plant, Soil and Environment

Goldbach H.E.¹  Clemens J.:¹  Scherer H.W.¹ 

关键词: potassium;    fertilisation;    availability;    yield formation;    potatoes;    sugar beet;    winter wheat;   

DOI  :  

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

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.

【 授权许可】

Unknown