ハウス栽培で施用する化学肥料の形態が土壌に与える化学的ストレス

概要

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The intensity of chemical stress of chemical fertilizers to soil under vinyl-house cultivation was examined by beaker and pot experiments. High-stress-type fertilizer was composed of ammonium sulfate, superphosphate and potassium chloride, and low-stress-type fertilizer was composed of ammonium nitrate, potassium phosphate and potassium nitrate. Application of high-stress-type fertilizer increased the EC value and lowered the pH value in soil, but application of low-stress-type fertilizer did not change the EC and pH values in soil. Continuous application of high-stress-type fertilizer at transplanting increased the EC value and lowered the pH value in soil progressively. On the other hand, continuous application of low-stress-type fertilizer hardly changed the EC and pH values in soil even after cultivation 6 times. Low-stress-type fertilizer give a slight chemical stress on soil because of lack of concomitant, i. e., SO_4^<2-> and Cl^-.
社団法人日本土壌肥料学会の論文
1996-08-05