Document Type : Research Paper

Authors

1 Associate Professor of Agronomy, Sari Agricultural Sciences and Natural Resources University, Mazandaran, Iran.

2 Ph.D. Student of Agronomy, Department of Agronomy, Agricultural and Nature Resources University of Sari, Sari, Iran

3 Professor, Department of Agronomy, Agricultural and Nature Resources University of Sari, Sari, Iran

4 Assistant Professor, Rice Research Institute in Amol, Research, Education and Extension Organization, Tehran, Iran.

Abstract

The field experiment was conducted as a split split plot based on a randomized complete block design with three replicaitons at Rice Research Institute of Mazandaran Province, Amol, in 2017. In this experiment, seeds were sown in seedling box with different six bed treatments. These beds included: S1: sulfur bed with 50% rice bran, S2: sulfur-free soil with 25% rice bran, S3: sulfur bed with 25% rice bran, S4: sulfur bed with Thiobacillus and 50% rice bran, S5: sulfur-free bed with wood compost and 25% rice bran, S6: sulfur bed with Thiobacillus with 25% bran rice. After some measurements, the seedling was transplanted in the main field. In field, different beds in box, seedling number per hill (3 and 5) and planting space (20×20 cm, 30×14cm) were assign in main plot, sub plot and sub sub plot, respectively. The results of main cultivation showed that the highest grain yield (5043 kg.ha-1) and biological yield (12319 kg.ha-1) were obtained from the treatment of bed soil with sulfur with 50% bran. Planting arrangement treatment in ratoon cultivation on number of hollow seeds (4.1), grain yield (1617 kg.ha-1), number of plants per hill treatment on number of tillers (10.3), leaf area (10.6 cm2), panicle length (20.4 cm) and grain yield (1613 kg.ha-1) and seedling type treatment on tiller number (10.4) showed a statistically significant difference. Seedling grown in sulfur with 50% rice brain showed the best performance in terms of yield and yield components in both main and ratoon cropping.

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