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- Title
CAN EM BIOSTIMULANT REDUCE THE HAZARDS OF SANITARY WATER WHEN USED AT VARIOUS LEVELS FOR IRRIGATION OF NEEM (AZADIRACHTA INDICA L.) SEEDLINGS.
- Authors
TAWILA, ATEF S.; SAID, REEM M.; SHAHIN, S. M.
- Abstract
An investigation was conducted under the full sun at the nursery of Hort. Res. Inst., ARC, Giza, Egypt during 2013 and 2014 seasons to examine the effect of blending irrigation water with primary treated sanitary water at the levels of 0, 25, 50, 75 and 100 %, alone or in the presence of the effective microorganisms (EM) biostimulant, which added with irrigation water at the rate of 3 ml/l on growth and chemical composition of 10-months-old Neem (Azadirachta indica L.) seedlings cultivated in 16-cm-diameter black polyethylene bags filled with about 3.5 kg of clay and sand mixture (1:1, v/v). The obtained results indicated that means of all vegetative and root growth parameters were significantly increased as a result of irrigation with sanitary water up to 75 % level where the level of 50% sanitary water treatment gave the highest means compared to those of the control and other levels of sanitary water in the two seasons. A pure sanitary water (100 % level) slightly reduced means of various growth traits to become less than those of control with non-significant differences among them in most instances of both seasons. Application of 3 ml/l of EM to any level of sanitary water caused additional improvement in all vegetative and root growth measurements, even with 100 % sanitary water treatment that recorded growth rates better than control ones with significant differences among them in most cases of the two seasons. However, the mastership in both seasons was for combining between 50 % sanitary water level and 3 ml/l EM treatment which gave the highest averages compared with the other individual and combined treatments. A similar trend to that of vegetative and root growth characters was also obtained in respect of chlorophyll a, b and carotenoids content in the leaves, as well as total soluble sugars content in the stem, leaves and roots. The contents of phosphorus and potassium in the stem, leaves and roots were inconsistent, with no specific trend as observed in other chemical constituents. The content of lead (Pb) and cadmium (Cd) in the different parts of plants showed a progressive increment with increasing sanitary water percent in ml irrigation water, but was greatly declined by applying of 3 ml of EM to the each liter of irrigation water regardless of its quality, indicating ability of such biostimulant in bioremediation of waste water. Hence, it is recommended to apply EM biostimulant at the rate of 3 ml/l to primary treated sanitary water when used for irrigation of Neem nurselings to minimize the hazards of such water, especially when used at 75 or 100 % levels.
- Subjects
NEEM; SEEDLINGS; IRRIGATION water
- Publication
Egyptian Journal of Agricultural Research, 2015, Vol 93, Issue 3, p307
- ISSN
1110-6336
- Publication type
Article