コーンスティープリカー (CSL) およびメタン消化液 (MFC) を利用した有機養液土耕がメロンのδ^15N値に与える影響

Effects of organic fertigation using corn steep liquor (CSL) and methane fermented cattle waste (MFC) on the δ^15N value of musk melon (Cucumis melo L.) were examined with comparison of conventional basal dressing of chemical fertilizer and fertigaion using chemical fertilizer. The δ^15N values of fruits on conventional basal dressing, inorganic fertigaion and organic fertigation were + 1.4‰, - 1.6‰ and + 6.3‰ in the 2000 experiment, + 3.0‰, - 1.7‰ and + 6.1‰ in the 2001 experiment, respectively, indicating that products from the three treatments were distinguishable using δ^15N values. Hence, δ^15N values could be useful as an indicator of organic or fertigation products