نوع مقاله : مقاله پژوهشی
نویسندگان
اعضای هیأت علمی و کارشناس مؤسسه تحقیقات خاک و آب
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
A field study was conducted to evaluate the effects of bean nodulating rhizobia on the growth and yield of bean. The experiment was carried out in Karaj Soil and Water Research Station using ten strains of native rhizobia, two nitrogen levels (35 and 70 mg N/kg soil) and a control treatment in a randomized complete block design (RCBD) with four replicates. The strains were grown in YMB until the population density of 5108 cfu/ml was measured then packed following the injection into 25 g samples of powdered perlite. The field soil was analyzed for chemical and physical properties as well as the number of native rhizobia. Seeds of bean (Cv Cos-16) were moistened with a 20% sugar solution and treated with the inocula before planting. N-fertilizer was used in two split applications. Plants were sampled at 50% flowering and at the end of the growth stage. The number and the dry weight of nodules, the shoot dry matter and total N-uptake of the shoots were measured at the first sampling time. With the second sampling, the seed yield, thousand kernel weight and protein content of the seeds were measured. Results showed that the inoculations increased the measured characteristics of plants. The superior strain improved the seed yield by 87% compared to the control.
کلیدواژهها [English]