Effects of irrigation management and nitrogen fertilizer on yield and yield components of rice (Oryza sativa L.)

Subject Areas : New Finding in Agriculture

M. Taghizade ¹ , M. Esfehani ² , N. Davatgar ³ , H. Madani ⁴

1 - M. sc. in Agronomy, Islamic Azad University. Arak Branch, Iran
2 - Gilan University, Iran
3 - Scientific Member of Rice Research Institute, Rasht, Iran
4 - Associ. Prof., Islamic Azad University, Arak Branch, Iran

Received: 2015-12-03 Accepted : 2015-12-03 Published : 2008-08-22

Keywords: Grain yield, nitrogen, Rice, Irrigation period,

Abstract :

The effects of irrigation intervals and nitrogen fertilizer rate, on yield and yield components of rice (cv. Hashemi) were investigated at Rice Research Institute of Iran, Rasht, in 2008.The effects of three nitrogen fertilizer rates (0, 60, 90 Kg/ha) and four irrigation intervals (permanent flooded, 5, 10 and 15 days after water disappearance from soil surface) were evaluated in a split plot amendment using CRBD with three replications. The results showed that 1000 grain weight, grain yield, biologic yield, tiller number, tillers fertility, panicles number per square meter, number of filled grains and panicle were significantly increased with nitrogen fertilizer increment. Grain yield was significantly increased at 90 Kg/ha of nitrogen fertilizer, the effects of irrigation intervals on biologic yield, tillers number, panicles number/m2, and number of filled grain. Results showed that the maximum grain yield was obtained at permanent flooded and 90 Kg N/ha that was not significant different with it days irrigation intervals and 60 Kg N/ha. It seems that the one ten day irrigation in tervals with the less nitrogen fertilizer rate (60 Kg/ha) may help to save water and nitrogen fertilizer. There was no difference between permanent and 10 days irrigation intervals.

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