Rice-based irrigated lowlands are the major cropping system in north of Iran. This experiment was carried out in split-split plot in basis of randomized complete block design with four replications at Sari, Mazandaran, Iran in 2008. Irrigation system include continues flooding and deficit as main plots and nitrogen rates N0, N46, N92, and N138 kg ha-1 as sub plots and silicon rates Si0 and Si500 kg ha-1 as sub-sub plots. Results showed that nitrogen fertilization induced an increase of this variable, and the result is associated to a greater. The number of filled spikelet's per hill also differed for nitrogen rates; higher values were recorded for the rate of N138. 1000 grain weight were increased significantly with increasing irrigation. Grain N content in flooding and deficit irrigation system. Grain yield in flooding irrigation was 31 Kg ha-1 higher than that of deficit system, which is not much regarding the much of water spent. Flooding irrigation system had the minimum harvest index and deficit irrigation had maximum harvest index. N138 and N0 had the maximum and the minimum grain yield, biological yield. The highest grain and straw N content were obtained in N138. At triple interaction of irrigation N rate Si rate was observed that the most grain N content was obtained at deficit irrigation in N138 with Si0 and Si500.
کلید واژگان :HI, Irrigation, Nitrogen, Rice, Silicon
ارزش ریالی : 300000 ریال
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