Study of Micronutrient Fertilizers Performance on Yield and Yield Component of Rice

Low efficiency of inputs consumption in the irrigated rice is obvious characteristics of this type of the cultivation system. These conditions led to increased production costs and other harmful consequences. Spraying and foliar application of liquid fertilizers are one of effective and efficient methods of fertilization in crops that thus, nutrients can be immediately and directly give to plants. Foliar application of nutrients is increasing in many crops. However, the use of any new fertilizer products for each crop should be based on research to evaluate their effects and to obtain information about amount, time and method of application of the fertilizer. In order to study of effect of 3 fertilizers produced by Mehrvarzan Company, on yield and yield components of rice plant, a field experiment was conducted on Tarom and Fajr varieties in 2009 and 2010 in Rice Research Institute of Iran- Deputy of Mazanddaran. The experimental design was split plot (separately for each variety) based on randomized block design with three replications. Main plots were were different fertilizers in 3 levels (Micro-Humichelate, Zn- Humichelate and Humic Acid) and sub-plots were different levels of concentration foliar application (0, 2 and 4 milliliter per liter in three growth stages). Nitrogen and other fertilizers applied after soil analysis based on technical instructions of Rice Research Institute. Grain yield, plant height, tiller number, number of filled and strile spikelet per panicle and 1000- grain weight were determined. Results showed that neither different kind of Mehrvarzan fertilizers nor dosages of foliar application did not affect significantly grain yield of two varieties. But effect of dosage was significant on tiller number, total and filled spikelet number in Tarom.