Study of water deficit on growth and yield of rice under different seeding methods
Mohsen Yousefi
1
(
Department of Agronomy, Takestan Branch, Islamic Azad University, Takestan, Iran
)
Jahanfar Daneshian
2
(
Professor of Seed and Plant Improvement Institute (SPII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
)
Mahmoud Bonyadi
3
(
Department of Agronomy, Takestan Branch, Islamic Azad University, Takestan, Iran
)
Keywords: Grain yield, Rice, low irrigation, direct culture,
Abstract :
This research was done in order to evaluate the direct culture methods of rise under different humidity conditions at 2011-2012 in Sangar, Rasht. Thus, a split plot experiment was conducted as base of randomized completely block design in 4 replication. The experimental factors in 2 levels included: I1: water height permanently 2 cm above (full irrigation) and I2: just damp (low irrigation) and direct culture methods in 4 levels included: S1: pile culture, S2: linear culture, S3: broadcast culture and S4: control (transplanting) were considered. Results revealed that effect of irrigation and culture method and their interaction were significant on grain yield. The full irrigation with mean of 3098 kg/ha had the highest grain yield compare with low irrigation with mean of 1871 kg/ha. Results also indicated that pile culture with mean of 2594 kg/ha had the most grain yield and then transplanting method with mean of 2530 kg/ha was in a next ranking and finally broadcasting method with mean of 2349 kg/ha had the least grain yield. The interaction of treatments demonstrated that transplanting method with mean of 3314 kg/ha had the most grain yield under full irrigation condition. But the pile culture with mean of 2054 kg/ha under low irrigation condition was superior to other treatments.