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Paper Information

Journal:   IRANIAN JOURNAL OF FIELD CROPS RESEARCH   2004 , Volume 1 , Number 2; Page(s) 257 To 269.
 
Paper: 

THE EFFECT OF THREE CROP ROTATION SYSTEMS ON DIVERSITY AND DISPERSAL OF WEED SEEDBANK COMMUNITIES

 
 
Author(s):  SIAH MARGUEE A., RASHED MOHASSEL M.H., BANAYAN M., KHARAGHANI F.
 
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Abstract: 

Seedbank to some extent is a reflection of weed population and It is the results of management from past to present. Crop rotation verifies the rotation of cultural practices. therfore, it may be considers as a basic factor to determine the density and diversity of weed communities. The object of this study was to investigate the diversity, density and distribution of weed seeds in three rotation systems including: wheat-sillage corn, fallow-chiekpea and fallow-cumin. The experiment was conducted during 2003 growing season. Fallow - cumin with 131.5 seed per kg of soil and wheat -sillage corn with 15.09 seeds per kg of soil showed the highest and lowest seedbank density, respectively. The Shannon diversity index was different in different rotations. Therefore, It may saggested that maniupulation in agroecosystems by human had significant effects on potential of various species presence. On the other hand, seeds of different weed species showed patchiness distribution. The results revealed that by using weed biological and ecological characteristics and its management based on density, diversity and distribution of species across the field, one may attains to more solid and safe results on the basis of weed control by using minimum, if any, amount of herbicide dose.

 
Keyword(s): COMPETITION, SHANNON INDEX, DIVERSITY, WEED SEED BANK, CROP ROTATION
 
References: 
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