INFLEUNCE OF NITROGEN LEVELS AND N03: NH. RATIOS ON VEGETATIVE GROWTH, YIELD AND CHEMICAL COMPOSITION OF CUCUMBER | ||||
| Journal of Plant Production | ||||
| Article 12, Volume 29, Issue 5, May 2004, Page 2713-2725 PDF (2.91 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238638 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Sawsan M. H. Sarg,; M. A. Hassan | ||||
| Faculty of Agriculture, Suez Canal Unlverslty,lsmaUla (A.R.E) | ||||
| Abstract | ||||
| .Two field experiments w~e c:anied out at the Experimental Farm of the Faculty of Agriculture, Suez Canal UniversIty during the two successive seasons of 2001 and 2002 to Investigate the effed of nitrogen levels ( 30, 60 and 90 kg N/fed) and NOJ : NH. ratios on vegetative growth, yield and elemental status of cucumber (Cucumis sBtivus, L.) Results indicated that increasing the applied nitrogen levels from 30 up to 90 kg NIfad. hcreased all the vegetative growth parameters (No. of leaves, plant height. shoot fresh and dry weights and leaves area Iplant). Conceming the N-form ratio, the results declared that the ratio of 2:1 NOJ : NH. gave the highest values of all parameters followed by 3:0 ,1 :1, 1:2 and the lowest values were obtained when NH. was the $Ole source of nitrogen. , ' Yield components,' .No. of fruits/plant, \otal yield! plant and yield! fed. were increased significantly with Increasing nitrogen level, however the avera~ of fruit weight and the early yield Iplant were higher with 60 kg NIfed: than with other twp rates. Regarding the N03: NH. ratios, results showed that the average number of fruitsI plant were higher with the ratio of 1:2 than 1:1 or 3: O. HOwever, the average fruit weight was higher with the ratios of 2:1 and 1:1 than the other ratios. The higheSt ear1y and total yield! plant and total yield! fed. were found with ratio of 1:2 folowed bX 1:1and the lowest values were observed with the ratio of 3:0. " Total nitrogen, phosphorus and potassium contents oflhe leavealncre ••• d with increasing nitrogen applied levels from 30 to 90 kg N.Jfed. Both ~ and P contents In the leaves 'Increased corresponding to the lnerean of NH.·N proportion In the mixture. However, the lowest K contents were found with the NH.- N fed plants and Incteased with Increaalng the N03: NH. ra~s. | ||||
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