Study of the Erosion and Fertilization Effects on Soil Fertility by Evaluation of Dry Land Wheat Yield in Bushehr Province.
2011
Pouzesh Shirazi , Morteza | Rahi , Gholamreza | Fakhri, Farhad | Parvizi, Ali Mohammad | Hosseini , Hossein | Kazeroni, Hassan
The aim of researches on erosion is keeping soil fertility on the suitable level and permanent utilization of agricultural lands. Field observations from north and east parts of Bushehr province in southern Iran prove the converting of poor pastures to low productive wheat farms which are being abundant soon. Therefore a research was designed in chahvak station to determine the effect of erosion and fertilizers usage on dried wheat production during 2007- 2010. the experiment was carried out on completely block design (split plot) with the following treatments: A- soil desurfacing instead of real erosion (blank, 5, 10 and 15 cm from surface layer) and B- fertilizer usage (blank, chemical fertilizers, straw residuals (2 ton/ha) plus chemical fertilizers). Fertilizers content was measured by soil analysis. The results of experiment showed that the effect of fertilizers, desurfacing and their interactions were significant at 1% on thousand seed weight. Only fertilizer treatments effected harvest index significantly (at 1%). Also, none of the treatments effects were significant on straw residuals. Soil analysis on the last year of experiment showed that fertilizer treatments effected saturation percent, available Phosphorous and Potassium at %5. Also, their interaction was significant on calcareous at %5. The effect of treatments on other physico-chemical treatments of soil was not significant. Key words: Bushehr province, dry land wheat, erosion, fertilizers.
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