Tawfik, A., Bekhit, R., Emara, M., Khereba, A., EI-Sharkawy, Z. (2003). EFFECT OF CULTIVAR AND POTASSIUM FERTILIZATION RATE ON TOTAL YIELD, CHEMICAL CONSTITUENT AND STORABILITY OF JERUSALEM ARTICHOKE TUBERS. Journal of Plant Production, 28(1), 493-512. doi: 10.21608/jpp.2003.242168
A. A. Tawfik; R. S. Bekhit; M. R. Emara; A. H. Khereba; Z. A. EI-Sharkawy. "EFFECT OF CULTIVAR AND POTASSIUM FERTILIZATION RATE ON TOTAL YIELD, CHEMICAL CONSTITUENT AND STORABILITY OF JERUSALEM ARTICHOKE TUBERS". Journal of Plant Production, 28, 1, 2003, 493-512. doi: 10.21608/jpp.2003.242168
Tawfik, A., Bekhit, R., Emara, M., Khereba, A., EI-Sharkawy, Z. (2003). 'EFFECT OF CULTIVAR AND POTASSIUM FERTILIZATION RATE ON TOTAL YIELD, CHEMICAL CONSTITUENT AND STORABILITY OF JERUSALEM ARTICHOKE TUBERS', Journal of Plant Production, 28(1), pp. 493-512. doi: 10.21608/jpp.2003.242168
Tawfik, A., Bekhit, R., Emara, M., Khereba, A., EI-Sharkawy, Z. EFFECT OF CULTIVAR AND POTASSIUM FERTILIZATION RATE ON TOTAL YIELD, CHEMICAL CONSTITUENT AND STORABILITY OF JERUSALEM ARTICHOKE TUBERS. Journal of Plant Production, 2003; 28(1): 493-512. doi: 10.21608/jpp.2003.242168
EFFECT OF CULTIVAR AND POTASSIUM FERTILIZATION RATE ON TOTAL YIELD, CHEMICAL CONSTITUENT AND STORABILITY OF JERUSALEM ARTICHOKE TUBERS
1Hortlcutture Research Institute, Agricultural Research Center, Giza, Egypt.
2Vegetable Crops Department, Faculty of Agriculture, Cairo University, Giza, Egypt.
Abstract
The interactive effect of potassium application rate and Jerusalem artichoke Local and Fuseau cultivars on plant growth, tuber yield, tuber chemical constituent and storability was studied during 1995 and 1996. Potassium levels of 24,48 and 72 kg K20. Fed-1 were used in both years. In addition, 96 kg K20. Fed -1 was investigated during 1996. Local cultivar showed higher foliage FW than Fuseau, in contrast to plant height. Local cultivar growth parameters responded positively with the increased levels of potassium application up to 96 kg K20. Fed-\ during 1996. Tuber yield of the Fuseau cultivar was 50 and 27% higher than that of the Local one, during 1995 and 1996, respectively.
The respective increases in tuber dry matter of Local cultivar than Fuseau were 1.5 and 3%, respectively. At 180 DAP, the highest potassium rate during 1995 and 1996 Significantly (P~0.05) enhanced tuber yield and dry matter, than other rates. Results also indicated that Local cultivar tuber yield increased as potassium level was elevated from 24 to 48 and 72 kg K20. Fed-1 as compared with Fuseau, during 1995. In contrast to inulin content, Local cultivar tubers showed greater total carbohydrate and total protein than those of Fuseau.
The application of 96 kg K20. Fed-1 increased tuber inulin and total carbohydrate, whereas that of 24 kg K20. Fed·1 enhanced total protein only. In contrast to tuber protein, inulin and total carbohydrate were increased as harvest was delayed to 180 DAP.
As storage period was prolonged, percentage of sprouted tubers, decay loss, weight loss and total weight loss were increased. In contrast to room temperature (24°C), tuber sprouting, weight loss and total weight loss were retarded under cold storage (10°C). Heedless of storage conditions, Local cultivar showed higher percentage of sprouted tubers and different losses than Fuseau. On the contrarytothoseof96 kg K20. Fed-1, tubers of 24 kg K20. Fed-1 exhibited higher sprouting but lower percentage of different losses.
Tubers stored with moistened peat moss, under room temperature, demonstrated higher percentage of sprouted tubers but lower decay, weight and total weight loss than their corresponding without peat moss. Under cold storage, tubers stored with moistened peat moss in polyethylene bags displayed lower decay, weight and total weight loss than those with peat moss in carton boxes. For fresh market, it is recommended to apply 96 kg K20. Fed·1, to enhance tuber yield and quality. If tubers have to be stored for a period of time, it is advisable to use Fuseau tubers of 48 kg K20. Fed-1 packed in polyethylene bags with moistened peat moss and stored at 10°C cold storage.
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