بررسي اثر بر عملكرد و اجزاء عملكرد سه رقم گندم در منطقه ني ريز

The effects of sowing date on the yield and yield components of three wheat cultivars in Neyriz region

In order to determine the effects of sowing date on yield and yield components of three wheat cultivars under climatic condition Neyriz region, a field experiment was carried out during 1995. A split plot design with four replication, was used in this experiment, main plot include four sowing date (6 th Nov., 21th Nov., 7Th Dec. 22th Dec.) and sub plot were included three wheat cultivars (Roushan, Falat and Ghods). The results showed that there was a significant effect between sowing dates and cultivars. The maximum grain yield (7616 Kg/ha) was obtained on sowing date of 21 th Nov. The grain yield of Falat (7000 kg/ha) was more than other cultivars. The cultivars showed on interaction with sowing dates significantly on grain yield so that, the maximum(9155 kg/ha) and the minimum (2370kg/ha) grain yield were obtained for Ghods cultivars on sowing date of 6 th Nov and Roushan cultivars on sowing date of 22Dec, significantly . study of yield components of seed indicated that spike density, spicklet per spile, seed per spike number and seed weight were in minimum on 22 th Dec sowing date. Maximum of spick density, seed per spike and spikelet per spike belonged to Falat cultivar.