| Titles |
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English :
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Use efficiency of different sulphur
sources for ameliorating the
productivity of a calcareous soil and cowpea-wheat as a cropping sequence
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Arabic :
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كفاءة إستخدام مصادر مختلفة من الكبريت في تحسين إنتاجية تربة جيرية
ولوبيا – قمح كتتابع محصولي
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| Abstract |
A field experiment was conducted on a calcareous sandy loam soil at Agric. Res. Farm of Noubaria, Egypt, during two successive seasons of 2009 and 2010, to evaluate the use efficiency of different S-sources (i.e., S-bentonite, gypsum and elemental sulpher), that were applied at the rates of 0, 300 and 500 kg/ha, on some soil properties and its productivity of summer cowpea (Vigna unguiculata, Douki 331 cv.) and winter wheat (Trilicum astivum L., Giza 2 cv.) as a cropping sequence.
The obtained data reveal that the applied S-rates significantly increased the yield attributes of cowpea. However, S-rate of 300 kg/ha resulted in relative increase percentages for pods/plant & seeds/pod reached 15.5 & 14.4 % over the control treatment, respectively. Such increases were more pronounced at the applied rate of 500 kg S/ha, where the corresponding values were 32.5 & 25.3 %, respectively. Also, the residual effect of applied S-rates of 300 and 500 kg/ha caused relative increases in grain yield for the next crop of wheat reached 42.0 and 62.7 % over the control treatment, respectively. Among the S-sources, S-bentonite, gypsum and elemental sulphur gave pronounced increases in seed yield of cowpea reached 53.0, 40.7 and 33.0 % vs 41.5, 38.0 and 25.0 % over the control treatment for the next crop of wheat, respectively. This means that S-bentonite was considered the best sulphur source from soil productivity point of view, followed by gypsum and elemental sulphur for both tested crops.
According to sulphur use efficiency for the tested cowpea-wheat cropping sequence, the obtained data show that the applied rate of 300 kg/ha was more effective than the rate of 500 kg/ha, especially when S was added as elemental sulphur, followed by gypsum and S-bentonite. So, applied S was profitable promising in terms of "Net Returns" which was significantly higher when cowpea was supplied with 300 kg S/ha vs 500 kg S /ha for wheat, the reverse was true for S-uptake by cowpea. From the economical point of view, the applied rate of 500 kg S/ha for
cowpea-wheat cropping sequence was more profitability. Furthermore, the net returns were highest with gypsum and S-bentonite being pronounced increases of 578 and 149 L- E/ha higher than elemental sulphur; respectively.
Under the current experimental conditions, it could be concluded that application of 500 kg S/ha to both cowpea and subsequent wheat plants grown on a calcareous soil was necessary to realize an optimum productivity and profitability of such cropping sequence. As for the applied different S-sources, it is noteworthy to mention that although gypsum was not only promising in terms of "sulphur use efficiency" but also it represents a better option from the applicable point of view as compared to S-bentonite and elemental sulphur, this is mainly due to its relative cheap costs
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| Publication year |
2010
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| Pages |
343-357
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| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
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| Country |
Egypt
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| serial title |
Egypt. J. ofAppl. Scf., 25 (6 A) 2010
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| Volume |
25
. 6A
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| Author(s) from ARC |
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| Agris Categories |
Soil chemistry and physicsSoil erosion, conservation and reclamation
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AGROVOC
TERMS |
Bentonite.
Cowpeas.
Gypsum.
Sulphur.
Wheats.
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| Publication Type |
Journal
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