Vanadium and plant nutrition: the growth of lettuce (lactuca sativa L.) and tomato (lycopersicon esculentum mill.) plants in nutrient solutions low in vanadium.
Lettuce (Lactuca sativa L.) and tomato (Lycopersicon esculentum Mill.) plants were grown in purified nutrient solutions with and without the addition of 50 nanograms per milliliter V. These experiments showed that lettuce and tomato plants can be grown to maturity on nutrient solutions containing less than 0.04 nanogram per milliliter V with tissue concentrations of less than 2 to 18 nanograms per gram V. Growth and dry matter yield were comparable to those of plants grown on nutrient solutions containing 50 nanograms per milliliter with tissue levels of V from 117 to 418 nanograms per gram. Thus if V is an essential element for lettuce and tomato plants, the adequate tissue level would be less than 2 nanograms per gram V derivable from a growth medium containing less than 0.04 nanogram per milliliter V.
Welch
R M
RM
United States Plant, Soil and Nutrition Laboratory, Agricultural Research Service, United States Department of Agriculture, Ithaca, New York 14850.
Huffman
E W
EW