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[9004692.] رقم البحث : 9004692 - |
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Impact of Disposable Diapers on the Growth of Jatroph acurcas Seedlings / |
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قطاع الدراسات الزراعية / General |
| تخصص البحث : General |
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Assiut Journal of Agricultural Sciences / / Vol. 52, no. 2 - june 2021 |
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يوسف خيرى انور ( 23 ) |
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هبه زغلول سالم - مؤلف رئيسي |
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مديحه حسن ذكري |
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ابراهيم نصار نصار |
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احمد محمد عبد الله |
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SAP, Jatropha, longevity, wilting point, evapotranspiration, wasted diapers. |
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The water scarcity, wide spread of sandy soil; forestry growth and the great amount of wasted diapers super absorbent polymer (SAP) are debating issues worldwide. The present study to evaluate the roles of disposable diaper on the growth of Jatropha Curcas seedlings. Three levels of SAP (0.0, 0.67, and 1.5%) were tested in a greenhouse experiment In addition, 15% clay treatment was used for comparison. These additives substances were mixed thoroughly with 20 kg of sandy clay loam soils. The seedlings were irrigated twice a week using 3 L of tap water (0.5 dS m-1) per pot, to ensure that the seedlings were successfully established for four months. The results presented great variations in the growth parameters, wilting points (soil water contents), relative water content (RWC), cumulative evapotranspiration (ETs), evapotranspiration (ET) rates, and survival times. Some parameters were used to estimate seedlings growth magnitude. The survivability was 38, 54, 72 and 64 days for 0.0, 0.67 and 1.5 %SAP, and 15% clay treatments, respectively. The relative water con-tents (RWC) were 81.81, 80.0, 76.47 and 90.63% for the 0.0, 0.67 and 1.5% SAP, and 15% clay treatments, respectively. The gravimetric wilting points were 1.1, 5.2, 3.3 and 4.0 % for 0.0, 0.67 and 1.5% SAP, and clay 15% treatments, re-spectively. The cumulative evapotranspiration per pot was 41.32, 40.43, 71.05 and 35.08 mm for 0.0, 0.67 and 1.5% SAP, and 15% clay treatments, respective-ly. The overall evapotranspiration rates were 1.09, 0.75, 0.98 and 0.55 mm/day for 0.0, 0.67 and 1.5 % SAP, and 15% clay treatments, respectively. The shoot heights and branch number did not differ significantly among the treatments at drought initiation. The leaf numbers differ significantly among the treatments at both drought initiation and wilting time. The leaf growth rates were 0.176, 0.129, and 0.151d-1 for 0.67 and 1.5% SAP and 15% clay treatments, respective-ly. Therefore, the Jatropha is properly is recommended a forestry tree under limited water resources in semi-arid region using the wasted SAP of diapers. |
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