The soil compaction effect on some nutrients availability, Uptake and growth of Corn
ANBAR JOURNAL OF AGRICULTURAL SCIENCES,
2008, Volume 6, Issue 2, Pages 32-45
AbstractThis experiment was conducted at the wood shader according to complete randomized design by using clay loam texture soil columns with 15 cm diameter and 40 cm height. which have been accomplished by compacted the soil after wetning it to the optimum water coutent for compaction by procter equipment to reached the bulk density levels 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55 and 1.60 Meg. m-3 After addition of nitrogen, phosphorus, potassium and micro nutrients, Iron, manganise, Zinc and copper with levels 240 kg N, 40 kg P, 40 kg K per hectar and (50 mg Fe, 2.5 mg Mn, 2.5 mg Zn and 1.0 mg Cu) per kilo of soil.
Corn seedes (Behoth 106) variety was sown and after first week one plant was left in every experimental unit (after 60 days from planting) the aerial parts were harvested and roots system were separated from the soil samples were taking from plants rizosphere zone. palnt height and dry weight for both aerial and root parts were measured, so that plant samples were digested, also rizosphere soil for estimated its contents from nutrients N, P, K, Fe, Mn and Cu to calculated the total uptake.
The results showed there is a second degree relation ship between compaction levels and studied growth parameters. also incneasing the compaction level negatively effecte on a vailability of N and Cu in the soil, while there were an increasing in the P, K, Fe, Mn and Zn availability.
The increasing in the Zn availability was due to the increase in of phosphorus availbality in the soil.
The study of plants total uptake after 60 days from planting were showed significant increase in the uptake of N, P, K, Fe, Mn and Cu with increasing bulk density from 1.25 to 1.35 Meg. m-3 there was gradnal decrease down to lowest value at density 1.60 Meg. m-3 with the second degree relarionship.
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