THE RESPONSE OF Dendranthema grandiflora, TZVELEV, CV. ICECAP PLANTS TO CALCIUM SILICATE SLAG AND DHT TREATMENTS | ||||
| Journal of Plant Production | ||||
| Article 22, Volume 34, Issue 6, June 2009, Page 6781-6790 PDF (626 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2009.118660 | ||||
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| Author | ||||
| M. Y. A. Abdalla* | ||||
| Veget. and Flor. Dept., Fac. of Agric., Mansoura Univ. | ||||
| Abstract | ||||
| This experiment was carried out at the Experimental Station and in the Laboratory of Vegetable and Floriculture Department, Faculty of Agriculture, Mansoura University during the two successive seasons of 2006/2007 and 2007/2008 to study the effect of calcium silicate slag and the growth regulator DHT treatments on growth, flowering and chemical composition of Dendranthema grandiflora cv. Icecap plants. The obtained results exhibited that the application of calcium silicate slag at 2.5, 5.0 and 7.5 g/pot and DHT at 0.1, 0.2 and 0.3% significantly improved the studied vegetative growth characters, flowering aspects and chemical composition of plants compared to the non treated ones in both seasons. Regarding the effect of calcium silicate slag, the obtained data showed that the maximum values for plant height, stem diameter, flower stem length and flower diameter were recorded on chrysanthemum plants treated with 5.0 g/pot. However, fertilizing the plants with 7.5 g/pot gave the highest values for number of branches/plant, herb dry weight/plant, number of flowers/plant, total flowers dry weight/plant, chlorophyll a, b and carotenoids content in the leaves, as well as, the uptake of phosphorus/plant. The plants treated with DHT as a foliar spray at a concentration of 0.1% gave the best results in all investigated parameters in both seasons. The combined treatment of 5.0 g/pot of calcium silicate slag plus spraying DHT at 0.1% gave the highest values of plant height, stem diameter, flower stem length and flower diameter. Similar effects on number of branches/plant, herb dry weight/plant, number of flowers/plant and total flowers dry weight/plant were recorded on chrysanthemum plants which received 7.5 g of slag material plus 0.1% DHT in both seasons. The great promotion on plant pigments and P uptake/plant was occurred on plants which received 7.5 g/pot calcium silicate slag plus 0.1% DHT. From the previous results, it could be suggested to supply chrysanthemum cv. Icecap plants with 7.5 g/pot calcium silicate slag plus spraying them three times with 0.1% DHT for obtaining vigorous and healthy plants and for producing maximum flowering aspects. | ||||
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