Decreased nitrogenous fertilizer technology by the 2,3 crops nitrogen of one-time diagnosis and fertilization in plastic green-house Brassica chinensis var. komatsuna
2006
Ishii, T.(Ibaraki-ken. Agricultural Center, Kasama (Japan). Horticultural Inst.) | Kawano, T. | Takei, M.
In a plastic green-house Brassica chinensis var. komatsuna with volcanic ash soil, decreased fertilizer technology by the 2,3 crops nitrogen of one-time diagnosis and fertilization was examined. This technology is a fertilization method where the amount of nitrogenous fertilizer is reduced by the nitrate nitrogen content of the pre-fertilization soil from the 2,3 crops standard amount of nitrogenous fertilizer. The 2,3 crops nitrogen one-time diagnosis fertilization showed a 34 - 91% decrease of nitrogenous fertilizer, and the method was equivalent to every crop standard amount of nitrogen fertilization in yield. And the method surpassed every crop standard amount of nitrogen fertilization in the utilization percentage of fertilization nitrogen and the decreased amount of nitrate nitrogen content after 3 crops.
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