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Availability of different potassium sources to carrot plants as affected by farmyard manure application and penecillium expansum fungus inoculation
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Abstract: Two experiments (incubation and field experiments) were conducted to study the effect of farmyard manure (FYM) and penecillium expansum fungus inoculation on potassium availability to carrot plant from two sources of potassium fertilizer (feldspar minerals and potassium sulfate).
Incubation experiment was designed to study the influence of FYM application at rates of 0,10 and 20 m3 fed-1 and inoculation with Penecillium expansum fungi on K availability from two sources at different levels 37.5 and 50 kg K2O fed-1 along with estimated penecillium expansum fungus propagules in soil at different period (0,3,6,12,20 and 30 day) respectively. Results showed that application 20 m3 of FYM was more effective in number of fungi , highest number was recorded after 20 days incubation period as well as available K was increased as time goes on. Also, results revealed that available K increased when FYM applied at the rate (20 m3) combined with low rate of either K2SO4 or feldspar (75% of recommended dose).
On the other hand, a field experiment was conducted to evaluate the inoculation or non-inoculation with penecillium expansum under same treatments of incubation experiment. Carrot (Daucus carota) plant was chosen as tested crop. Results showed that carrot yield gradually increased with increasing the applied rate of FYM. Moreover, inoculation with penecillium expansum increased carrot yield (straw and root) as compared to non-inoculation treatments.
Results demonstrated that the highest significant increase of carrot yield and macronutrients uptake (NPK) were obtained when feldspar was applied at rate of (75%) of the recommended dose (F1) along inoculation with penecillium expansum as well as such indicated parameter was increased as K2SO4 rate increased.
Generally, inoculation the soil with penecillium expansum led to a gradually increase in microbial populations of carrot rhizosphere soil at both tested growth stages of carrot plant as compared to non-inoculation treatments. Also, the application of 10 m3 FYM was more effective to microorganisms growth (bacteria, fungi and actimycetes) as compared to other FYM treatments
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| Publication year |
2005
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| Pages |
690-707
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| Availability location |
Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt
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| Availability number |
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| Organization Name |
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| City |
Zagazig
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| serial title |
Egyptian Journal of Applied Sciences
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| ISSN |
1110-1571
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| Author(s) from ARC |
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| Agris Categories |
Soil fertility
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AGROVOC
TERMS |
Biofertilizers.
Carrots.
Farmyard manure.
Fungi.
Nutrients.
Potash fertilizers.
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| Publication Type |
Journal
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