Study of regression relationships between irrigation period and Castor plant characteristics )Ricinus communis(

Subject Areas : New Finding in Agriculture

Ghanbar laei ¹ (دانشگاه آزاد اسلامی، واحد دامغان، گروه کشاورزی، دامغان، ایران)
Hossein afshari ² (دانشگاه آزاد اسلامی، واحد دامغان ، گروه کشاورزی، دامغان ، ایران.)
Mehrdad Mohamadi ³ (دانشگاه آزاد اسلامی، واحد ساری، گروه کشاورزی، ساری، ایران.)

Received: 2015-12-02 Accepted : 2015-12-02 Published : 2010-10-23

Keywords: Irrigation, regression coeficient, castor,

Abstract :

     In order to study of regression coeficient for irrigation periods and traits of castor plants this fiels experiment was done in 2010 at Damghan Islamic Azad University research farms. The experiment model was randomized complete block design with three replications. Irrigation periods intervals were every 5, 10 and 15 days. Plant densities were 5 plants per square meter.After data harvesting we used from SAS statistical software and mean comparition was calculate by Duncan's multiple range test at  5%. the correlation coeficient between plant characteristics irrigation periods were stimated too. All traits studied showed significant differences for the period of irrigation and the highest yield and lowest yield in a period of 5 days of irrigation in the irrigation period was 15 days I attribute 15 percent oil and protein content in irrigation water during the 10 days had the highest. Attributes associated with the irrigation effect was linear (r =0/95**) and the correlation with oil yield significant and negative r=0.65*, % protein and significant and negative relationship was -0.85**Percent of the oil with the water cycle has a positive slope of the line that represents.  

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