Research on ratooning potential of rice lines Lines and current cultivars
2011
Sharafi , Naser; | Salman, Hasan.
In order to evaluate the ratoon yield in different rice varieties and study on other traits were selected no. of a varieties both local and improved namely hasani , hashemi, alikazemi, domsiah, sepeedrod, dorfak (424), kados (4), lines of 216 and 507. after harvesting of first crop, buds of plant residuals started to grow, after some days were formed ratoon panicles. Irrigation and Azote fertilizer were given to ratoon farm and during nov. ratoon crop matured graduately. Agronomic traits Including of plant height, no. tillers, no. grain in panicle, yield and quality parameters were evaluated. Results showed that 4 varieties had effective ratoon yield Including Alikazemi, Hashemi, Hasani and sepeedrod. Highest yield was related to Hasani (1.2 t/ha). Proper temperature and adequate water were most effective on ratoon yield. Highest yield is related to hasani (150 gr/m2). Results showed that early maturity varieties have higher ratooning property and in Gilan province farmers can produce rice ratoon until half of Nov. with a high trust. Results showed that cooking quality traits in particular amylase have a good status (20- 25).plant heighhht in ratoon crop was shorter than main crop and no.of grain in panicle was lower than main crop. The best ratoon yield was related to Hasani approximately 40% of main crop and Hashemi and Alikazemi were in next class. The leines of 507 and 216 had lowest ratoon yield(300-400 kg/ha).
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