نوع مقاله : مقاله پژوهشی
نویسندگان
1 عضو هیأت علمی مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان رضوی
2 عضو هیأت علمی مؤسسه تحقیقات خاک و آب
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In a RCB design , effects of deficit irrigation on Canola yield and water use efficiency (WUE) were investigated. Also phonologic stages sensitive to drought stress were determined at Mashhad Agricultural Research Station. Treatments included: I1= without irrigation. I2= irrigation at stem elongation, flower bud development, flowering and pod development stages. I3= irrigation at flower bud development, flowering, and pod development stages. I4= irrigation at stem elongation, flowering and pod development stages. I5= irrigation at flower bud development and pod development stages. I6= irrigation at flowering and pod development stages. Maximum grain yield (2837 kg.ha-1) was obtained from I4 treatment (Duncan’ test , α=0.05). Lowest yield was obtained in I1 treatment equal to 1746 kg.ha-1 .The same treatment also had the lowest percent of seed oil. Because of above-normal precipitation in the second and third year, I1 treatment had the highest water use efficiency as 0.6 kg.m-3. According to our results, irrigating at stem elongation, flowering , and pod development is necessary for obtaining suitable yield and WUE.
کلیدواژهها [English]