Effect of phosphorous application on chickpea nodules production and some fertility properties of calcareous soil of Duhok-KRG-Iraq

Abstract EN

Afield experiment was carried out during spring season of 2020 at research station of the College of Agricultural Engineering Sciences to evaluate the effect of different phosphorus levels on chickpea nodules production, soil physical and chemical after phosphorus application.

A randomized complete block design was used, with three replications, five application rates of P2Os ,0,15,30,45,60 Kg.ha'1.

The results revealed that the phosphorus levels were have highly significantly affected on number of nodules plant',seed yield, plant heigh, number of main and secondary branches per plant, first pod height and number of pods plant',and also, results showed the maximum number of nodules per plant(43.33) yield (667.7) Kg.ha'1 .plant height (54.33)cm, main and secondary branches (4) and 2.3 respectively, first pod height (26.17cm) and maximum pods plant'1 27.67 was recorded at maximum rate of phosphorus, (60 Kg.ha1) Regarding agronomic efficiency percent, the results exhibited maximum value of this percent was recorded at 60 Kg.ha'1 P2O5, the results indicated application of 60 Kg.ha'1 gave the highest values for all studied traits and recorded highest value of coefficient determination (R ) 0.95,0.94,0.91 and 0.99, for plant height, secondary branches per plant, pod height and number of pod plant'1 respectively.

The results exhibited highly significant and positive correlation for seed yield 0.92.0.90,0.87 and 0.84 with number of pods plant'1, plant height, number of main and secondary branches plant'1 respectively.

Application of phosphorus the soil increases some physical and chemical properties of soil such as pH, EC, available of phosphorus, organic matter and cation exchange capacity.