Luxury consumption of potassium by plants and its significance
1929
Bartholomew, R.P. | Janssen, G.
Analyses were made to determine the potassium content of grown in soil, sand, and solution cultures which had received applications of different amounts of potassium. A theory for the utilization of potassium is developed from the data presented. The application of the theory to fertilizer practices is discussed. The results may be summarized as follows: 1. Plants absorb considerable more potassium during the early periods of growth than is necessary for the normal processes of growth. This applied to the crops studied, including alfalfa, Hubam clover, cowpeas, soybeans, oats, wheat, Sudan grass, corn, cotton, and tomatoes. 2. The potassium in the tomato plant is practically all water soluble. 3. Potassium can be translocated within the plant and reutilized to prevent starvation when the supply of available potassium is insufficient to supply the needs of the growing regions. 4. It is suggested that the luxury consumption of potassium followed by translocation and reutilization of the potassium in the plant is an important process in the assimilation of potassium by plants.
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