Abstract
Crops hardly absorb iron (Fe) from high pH soil in plastic greenhouse. Low absorption of iron disturb developing and stabilizing chlorophyll thus result in chlorosis of leaf. Iron absorption of crops can be promoted by application of iron-chelate fertilizer. However use of iron-chelate fertilizer is limited by its high cost. This study was conducted to suggest a simple and low cost methodology for manufacturing iron chelate fertilizer and to analyze the effect of condensed molasses solubles enhanced with iron (CMS-Fe) application on growth and yield of cherry tomato in alkali soil. Soil pH used in this experiment was 7.55. One liter of CMS-Fe solutions were treated by soil injection with four different application levels respectively (Fe 0, 100, 200, 400 ppm). On the 73rd day after transplanting, growth and yield characteristics of cherry tomato and iron content of leaf were analyzed. Iron content and SPAD value of leaf in CMS-Fe application treatments were higher than those in none Fe enhanced CMS and inorganic fertilizer (NPK) application treatments. Yield of CMS-Fe application significantly increased compared with those of none Fe enhanced CMS and inorganic fertilizer application only. Therefore, CMS-Fe application by soil injection is quite useful to improve growth and productivity of cherry tomato in high pH soil. Effect of Fe-enhanced CMS application on SPAD value and Fe content in cherry tomato leaves, and fresh weight of fruits.
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