Paper Information

Journal:   IRANIAN JOURNAL OF FIELD CROPS RESEARCH   2004 , Volume 1 , Number 2; Page(s) 305 To 313.
 
Paper: 

EFFECT OF LIMITED IRRIGATION ON YIELD AND YIELD COMPANENTS OF THREE RAPESEED CULTIVARS UNDER TABRIZ CLIMATIC CONDITIONS

 
Author(s):  YAHYAVI TABRIZ S., SADRABADI HAGHIGHI R.
 
* 
 
Abstract: 

In order to evaluate the effects of limited irrigation on yield and yield components of three spring rapeseed cultivars (Brassica napus) in Tabriz an experimental design was conducted in Tabriz Agricultural Research Station in 2001. Experiment was a split plot on the basis of randomized complete block with four replications. In main plots, four irrigation treatments, including: 1.complete irrigation, 2. irrigation at sowing and stem elongation 3.irrigation at sowing and flowering, and 4.irrigation at sowing and seed filling were randomized. Three spring rapeseed cultivars, including early ripening Hyola 401, mid ripening option 501, and late ripening PF 7045/91 were allocated to subplots. Maximum yield was obtained from complete irrigation and late ripening cultivar PF7045/91 with mean seed yield of 2150 kg/ha. In this irrigation treatment yield of mid ripening cultivar Option 501 with 7 percent lower yield was not significantly different from PF7045/91, but early ripening cultivar Hyola 401 with approximately 25% lower yield showed significant difference with PF7045/91. In all three cultivars the lowest seed yield was obtained from limited irrigation in stem elongation stage. Mean seed yield in this treatment was 780 kg/ha and reduced by 60% compared to yield in complete irrigation. The influence of drought stress in this situation on late ripening cultivar was considerably more than two other cultivars. In all three cultivars with meeting the water requirements of plants through limited irrigation in floral stage, reduction in seed yield with respect to other stages was lower and approximately 27% less than complete irrigation. In ripening stage irrigation treatment effects of drought stress on seed yield was drastically more than limited irrigation in the time of flowering but was less than irrigation in stemming stage. Reduction of seed yield in this treatment compared to complete irrigation was 40% averaged over cultivars. The results showed that the best time for limited irrigation in rapeseed in Tabriz condition was at flowering combined with irrigation at sowing date.

 
Keyword(s): LIMITED IRRIGATION, RAPESEED, YIELD AND YIELD COMPONENT
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 42
 
Latest on Blog
Enter SID Blog