Abstract
A pot experiment was conducted to study the effects of sewage sludge and nitrogen fertilization on the growth, yield, nutrient and heavy metal uptake into rice straw (Oriza setiva L cv. BRRI dhan-36). There were five 5 treatments (T0, T1, T2, T3 and T4) consisting of 5 levels of sewage sludge (0, 60, 120, 200 and 300 t/ha) and 5 levels of nitrogen (280, 49, 35, 28 and 21 kg/ha). In the experiment the highest height of the rice plant (97.33 cm per plant) and number (55.00) of tillers per four plants were recorded with the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen. The length of spikelet was significantly high in all treatments compared to the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen. On the other hand, both the fresh and dry weight of rice straw was significantly high in the aforesaid treatment compared to the other treatments. The contents of N, K, Na, Ca, Mg, Fe, Cu, Zn and Pb in rice straw increased significantly with increasing sewage sludge levels and were observed high at the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen, but the amount of P and Mn uptake decreased significantly with increasing sewage sludge levels showing an antagonistic effect. Cr, Cd and Ni contents were below detectable level. Key words: Sewage sludge, Fertilization, Rice straw, Nutrient, Heavy metal doi: 10.3329/bjsir.v43i4.2248 Bangladesh J. Sci. Ind. Res. 43(4), 571-580, 2008
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Claims 9
Claim · model-written summary
The 300 t/ha sludge plus 21 kg/ha nitrogen treatment gave the highest rice height, 97.33 cm per plant.
- Taxon
- rice
Oryza sativae0 - Treatment
- 300 t/ha sewage sludge plus 21 kg/ha nitrogene0
- Outcome
- height of the rice plante0
- Direction
- higheste0
- Value
- 97.33 cm per plante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest height of the rice plant (97.33 cm per plant) and number (55.00) of tillers per four plants were recorded with the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen”
Claim · model-written summary
The same treatment produced 55 tillers per four plants.
- Taxon
- riceOryza sativae0
- Treatment
- 300 t/ha sewage sludge plus 21 kg/ha nitrogene0
- Outcome
- tillers per four plantse0
- Direction
- higheste0
- Value
- 55.00e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest height of the rice plant (97.33 cm per plant) and number (55.00) of tillers per four plants were recorded with the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen”
Claim · model-written summary
Spikelet length was significantly greater under all other treatments than under the highest-sludge treatment.
- Treatment
- all treatmentse0
- Outcome
- length of spikelete0
- Direction
- highe0
- Comparator
- 300 t/ha sewage sludge plus 21 kg/ha nitrogene0
Not reportedTaxon
Verbatim
e0“length of spikelet was significantly high in all treatments compared to the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen”
Claim · model-written summary
Rice straw fresh and dry weight were significantly high under the highest-sludge treatment.
- Taxon
- riceOryza sativae0
- Treatment
- 300 t/ha sewage sludge plus 21 kg/ha nitrogene1
- Outcome
- fresh and dry weight of rice strawe0
- Direction
- highe0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both the fresh and dry weight of rice straw was significantly high in the aforesaid treatment compared to the other treatments”
e1“recorded with the treatment, 300 t/ha sewage sludge plus 21 kg/ha nitrogen”
Claim · model-written summary
Rice straw N, K and Na content increased significantly as sewage sludge rose.
- Taxon
- riceOryza sativae0
- Treatment
- increasing sewage sludge levelse0
- Outcome
- contents of N, K, Nae0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of N, K, Na, Ca, Mg, Fe, Cu, Zn and Pb in rice straw increased significantly with increasing sewage sludge levels”
Claim · model-written summary
Rice straw Ca, Mg and Fe content increased significantly as sewage sludge rose.
- Taxon
- riceOryza sativae0
- Treatment
- increasing sewage sludge levelse0
- Outcome
- Ca, Mg, Fee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of N, K, Na, Ca, Mg, Fe, Cu, Zn and Pb in rice straw increased significantly with increasing sewage sludge levels”
Claim · model-written summary
Rice straw Cu, Zn and Pb content increased significantly as sewage sludge rose.
- Taxon
- riceOryza sativae0
- Treatment
- increasing sewage sludge levelse0
- Outcome
- Cu, Zn and Pbe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contents of N, K, Na, Ca, Mg, Fe, Cu, Zn and Pb in rice straw increased significantly with increasing sewage sludge levels”
Claim · model-written summary
P and Mn uptake decreased significantly with increasing sludge.
Not reportedTaxon
Verbatim
e0“amount of P and Mn uptake decreased significantly with increasing sewage sludge levels”
Claim · model-written summary
Cr, Cd and Ni content was below detection.
- Taxon
- RiceOryza sativat0
- Outcome
- Cr, Cd and Ni contentse0
- Direction
- below detectable levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cr, Cd and Ni contents were below detectable level”
t0“Rice Straw”
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