بررسی اثر ازت و تراکم بذر بر عملکرد گندم دردست معرفی لاین ‭...Tr80 (‬کوهدشت) درشرایط دیم گرمسیری

In order to achieve the best yield and proformance from new varieties of crop plants determining their requirements such as their needs to fertilizers and suitable seed densities are of major importance. Based on this fact, at the present study the effects of nitrogen and seed rate on grain yield of new releazed dryland Bread wheat variety Kohdasht were evaluated through a factorial design including 16 combined treatment (seed rate x nitrogen ) . with 4 replications, in Gachsaran agricultural research station through 3 consecutive years. The Nitrogen were used at 3 level 30, 60 and 90 kgN/ha and the seed rates were 250, 300,350 and 400 grain /m2. The result achieved showed that treatment N4D4 produced maximum grain yield 3.138 t/ha while treatment N1D1 yielded mimimum 2.415t/ha . the result of 3 years combined analysis of variance showed a significont differences among nitrogen rates at level of 1% , while the differences among seed rates were signficant at level of 5% . The interaction effects of N and seed rates were also significont at level of 1% .

Keywords:

گندم , تراکم بوته , نیتروژن , دیم , خصوصیات زراعی , عملکرد دانه , گندم کوهدشت , تجزیه خاک , بارندگی , آب و هوا