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Paper Information

Journal:   ELECTRONIC JOURNAL OF CROP PRODUCTION   SUMMER 2012 , Volume 5 , Number 2; Page(s) 19 To 35.
 
Paper: 

THE RESPONSE OF RICE PLANT TO PERENNIAL APPLICATION OF VERMICOMPOST ALONE AND PLUS WITH DIFFERENT CHEMICAL FERTILIZERS

 
 
Author(s):  MOUSAVI M., BAHMANYAR M.A., PIRDASHTI H.*
 
* DEPT. OF AGRONOMY AND PLANT BREEDING, GENETICS AND AGRICULTURAL BIOTECHNOLOGY INSTITUTE OF TABARESTAN, SARI UNIVERSITY OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES
 
Abstract: 

Organic fertilizers such as vermicompost (VC) are an undeniable source of required nutrients of plants. This field experiment performed as split plot arrangement based a randomized complete block design withthree replications in 2008. The main factors (vermicompost treatments) added to soil atsix levels including 20 and 40 ton.ha-1, 20 and 40 ton.ha-1plus (1/2) chemical fertilizer, chemical fertilizer (consists of 100 kg.ha-1 urea, 150 kg.ha-1 triple superphosphate and 100 kg.ha-1 potassium sulphatebased on soil testing analysis) and control. Also, sub plots considered VC application periods (1, 2 and 3 years). Results showed that usingVC and also fertilization year's factor significantly affected studied traits of rice. So, 40 ton.ha-1 VC plus 50% chemical fertilizer determined as the best fertilizer level, because the maximum content of biomass (12.43 ton.ha-1), tiller number, height, total number of grains in panicle (124.3), harvest index (41.41%) and yield (681.1 g.m2) and also the lowest percent of unfilled grain in panicle (15.52%) recorded in this treatment. Meanwhile, 40 ton vermicompost per hectare treatment had the highest panicle fertility percentage (94.08%). Increasing application periods regularly enhanced the content of studied traits. In addition, the maximum positive and significant correlation coefficient (r= +0.91**) existed between paddy yield and harvest index.

 
Keyword(s): VERMICOMPOST, CHEMICAL FERTILIZER, RICE, YIELD, APPLICATION PERIODS
 
References: 
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