Screen of promising line and varieties for different Salinity water leveis on rice yield.
2009
Asadi, Reza | Fallah, Vali Mohammad | Sa`adati, Naser | Nasiri, Morteza | Mohammadiyan, Mohammad | Ehsani, Behruz | Kard Gar, Lotf Ol-Lah
Salinity is one of the biggest constraints to obtain crop potential yield throughout paddy fields in some part of the coastal line of rice cultivated area in Iran. In order to find tolerant varieties and study the reaction of some newly released high yielding varieties to different levels of salinity of irrigation water an experiment was conducted in a RCD in a greenhouse at the Rice Research Inst. of Iran-in mazandaran province . 8 varieties, cultivated in pots, were tested with 3 levels of salinity ( 2, 4 and 6 dsm-1 : S1, S2 and S3 respectively) along with control (S0: EC=0.8 dsm-1 ) with 3 replication. The result showed that salinity affected adversely yield number. Of tillers per pot, filled and unfilled spikelets, fertility, 100 grain weight, but increased number. Of unfilled tillers. The average of rice yield loss threshold was calculated 1.3 ds/m. In average number. Of panicle and number. Of filled spikelets accounted for 80 and 59 percent of total variation of grain yield, but it decreased by increasing in salinity level. There was a high correlation between yield and number. Of panicle and grain weight per panicle.
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