RESPONSE OF CARAWAY TO PHOSPHATE AND POTASSIUM FERTILIZATION 1- YIELD AND YIELD COMPONENTS TRAITS

A. M. Al-Al-Samraee, A.

	RESPONSE OF CARAWAY TO PHOSPHATE AND POTASSIUM FERTILIZATION 1- YIELD AND YIELD COMPONENTS TRAITS
The Iraqi Journal of Agricultural Science
Article 1, Volume 45, Issue 7, 2014, Pages 729-737
Author
A. A. M. Al-Al-Samraee
Abstract
A field experiment was carried out during the two winter seasons of 2010 and 2011 at the experimental field of Crop Science Dept., College of Agriculture–University of Baghdad/Abu Ghraib, to study the response of caraway to levels of phosphate and potassium and their impact on some growth and yield traits. The experiment included phosphate levels (0, 40 and 80 kg P2O5.ha-1) as a main factor and potassium levels (0, 100 and 200 kg K2O. ha-1) as a secondary factor. These treatments were arranged according to the randomized complete block design in a split-plot arrangement with three replicates. The results showed that the phosphate levels had significant effects on most studied traits. The level 80 kg P2O5.ha-1 was superior significantly to give highest means of plant height (109.2, 110.2 cm), number of branches (14.6, 15.3 branch.plant-1), number of inflorescence (62.3, 62.8 inflorescence.plant-1), number of sub-inflorescence (14.9, 15.2 sub-inflorescence. inflorescence-1), number of fruits (16.0, 17.0 fruit. sub-inflorescence-1) and fruit yield (993.3, 1008.1 kg.ha-1) in both seasons, respectively compare with other treatments. There are non-significant different between potassium levels (100 and 200 kg K2O. ha-1) on most studied traits. the level 100 kg K2O. ha-1 gave highest means for plant height (102.6,104.0 cm), number of branches (12.9,13.2 branch.plant-1), number of inflorescence (59.4, 59.7 inflorescence.plant-1), number of sub-inflorescence (14.2,14.5 sub-inflorescence. inflorescence-1), number of fruits (15.9, 16.6 fruit. sub-inflorescence-1) and fruit yield (951.0,964.4 kg.ha-1) in both seasons, respectively compare with control treatment. Interaction between the two factors was significantly for most studied traits. The combine between 80 kg P2O5.ha-1 and 100 kg K2O.ha-1 recorded values for interaction were non-significant different from combine 80kg P2O5.ha-1 and 200 kg K2O.ha-1 in both seasons, respectively. We recommend application 80 kg P2O5.ha-1 that gave best result for all studied traits, in addition to reduced potassium fertilization to 50%.
Keywords
Carum carvi L; Macronutrients; fruit yield

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