Reduction of Fertilizer Nitrogen Requirement by Plant Growth Factors. Final Progress Report

摘要

Results obtained from plant growth experiments are presented. The effects of auxins, commercial fertilizer and Single Cell Protein waste, alone and in various combinations, were measured. The tomato plants used were obtained by germinating seeds and allowing them to grow to approximately three inches in height in sterilized potting soil. Plants of uniform size were transplanted to gallon size pots containing sterilized, mineral balanced, nitrogen deficient potting material. Appropriate control and test materials were added. Moisture and temperature were controlled in the greenhouse. Plant growth, as measured by height of stem, was reasonable when plants were supplied with SCP material although not as good as when commercial fertilizer was used. A slight additive effect was noted with some combinations of SCP material and fertilizer. Minimal concentrations of commercial fertilizer were required for the development of maximum leaf size and in its absence leaf size was reduced slightly. Combinations of SCP waste and fertilizer also resulted in slightly reduce leaf size, suggesting some inhibitory effect. (ERA citation 09:004895)