Investigation effect of cultivar, planting date and humic acid on protein content, oil seed and chlorophyll content in (Ricinus communis L.)

Subject Areas : Journal of Plant Ecophysiology

R. Moradi ¹ , H. Afshari ² , J. Masoud Sinaki ³ , M. Zadeh Bagheri ⁴

1 - دانش آموخته کارشناسی ارشد دانشگاه آزاد اسلامی واحد دامغان
2 - دانشیار دانشگاه آزاد اسلامی واحد دامغان
3 - استادیار دانشگاه آزاد اسلامی واحد دامغان
4 - استادیار دانشگاه آزاد اسلامی واحد شیراز

Received: 2014-11-03 Accepted : 2014-11-03 Published : 2014-11-01

Keywords: Chlorophyll, Protein, Carotenoid, oil volume, planting date,

Abstract :

In order to investigate the effect of different planting dates and application of different sprayed humic acid compounds on physiological and chemical characteristics in different cultivars of grasses Castor (Ricinus communis L.), an experiment was conducted at the research farm of Agricultural Research Station located in Shiraz Islamic Azad University, Shiraz, Fars, Iran (located at 29°37′N52°32′E and 1486 m altitude elevated from sea level) during spring 2013. The experiment design was laid out entirely in a split–factorial arranged in a randomized completed block design (RCBD) with three replications. In the present study, two different varieties of Ricinus communis L. named Impala and Local Dameghan cultivars were considered as the main factor, two levels of sprayed humic acid (1500 and 3000kg/ha-1) as the second factor and planting date as the third factor. During these treatments at harvest time stage, the quantitative and qualitative properties, including (seed yield, oil seed, protein content, total chlorophyll content, carotenoid content) were measured and compared with control. Result showed that total chlorophyll content and oil seed percent at 17 June planting date was significant at P <0.01. The results indicated that the highest seed oil (50.08%), chlorophyll a (5.17 mg/g), chlorophyll b(5.35 mg/g) and carotenoid content (59.17mg/g) were related to the application of 3000kg/ha-1 humic acid treatment. In addition, the results showed that the highest protein content (22.3%) was related to Local Dameghan cultivar. On the other hand, the highest seed oil (47.4%) and chlorophyll a (5.1mg/g) and chlorophyll b (5.2 mg/g) were recorded for improvement cultivar.