EFFECT OF SOME HUMIC ACIDS ON WHEAT PLANT GROWN IN DIFFERENT SOILS

Taha, A.A.; Modaihsh, A.S.; Mahjoub, M.O.

doi:10.21608/jssae.2006.204049

EFFECT OF SOME HUMIC ACIDS ON WHEAT PLANT GROWN IN DIFFERENT SOILS

Document Type : Original Article

Authors

Soil Sci. Dept., College of Food and Agricultural Sci., King Saud Univ., Saudi Arabia

10.21608/jssae.2006.204049

Abstract

A pot experiment was conducted to study the effect of four humic acids
extracted from different composts on wheat plant (Triticum aestivum L. cv. Yecora
rojo) grown in a highly calcareous loamy sand soil (CaC03=28%) and in
noncalcareous sandy soil (CaC03= 4.2%). The humic acids were applied at five
rates (0, 50, 100, 150, and 200 kg ha-"_ All pots received 30% of the recommended
amounts of inorganic fertilizers (N, P and K).
The obtained data show that the available nutrients (P, K, Fe, Mn, Zn and Cu)
were higher in noncalcareous soil in compared to the calcareous soil. The results
also show that increasing the rates of the investigated humic acids resulted in an
increase in the organic matter content in the two studied soils , the macro and
micronutrients uptake (N, P, K, Fe, Mn, Zn and Cu) by wheat plant and its yield (grain
and straw).
Application of humic acid which extracted from the animal compost gave the
highest values of available nutrients, organic matter content, yield and yield
components as well as nutrients uptake by wheat plant. This indicates that this
humic acid is in a good mature state than the other studied humic acids.

Keywords