Impact of Fertilisation Management and Soil Conditions on Soil Respiration in a Semi-Arid Environment of Seleite Farm-Sudan, A.B.G. Mohammed, Z.C. Yi and Dr. S.A.M. Saad
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A.B.G. Mohammed
Chinese Academy of Sciences
China
Z.C. Yi
Chinese Academy of Sciences
China
Dr. S.A.M. Saad
National Center for Research
Sudan
Purpose: The aim of this paper is to investigate whether the application of fertiliser on soil under cultivation of sorghum, supported by irrigation, may encourage soil moisture conditions for respiration, especially after several days of irrigation.
Method: In this study, traditional fertilisers were applied using the same amount as by many farmers; this was on three sites of Seleite farm during the summer, the season for sorghum cultivation, in order to quantify soil respiration (SR). After 14 days, soil respiration from the fields was measured corresponding to the status of field conditions before and after irrigation.
Findings: Our results showed that the mean soil respiration rates were significantly increased by the amount of moisture and fertiliser in the field. The high level of correlation indicates that SR was strongly controlled by the amount of soil moisture and fertiliser. SR tends to increase with the increasing moisture in treatments, while it tends to decrease with the decreasing moisture. Higher SM (2.74%) and lower ST (28.22°C) in wet conditions (after irrigation) compared to dry conditions (before irrigation) resulted in higher SR in treatment A,“fertiliser A”. Higher ST (34.8°C) and lower SM (1.852%) that occurred in dry conditions, induced lower SR in the same treatment. The increase of almost 50% in soil moisture caused a significant increase in SR by nearly 50%, in all wet days during the season. Measured over a period of both patterns (wet vs dry), SR in treatment B was approximately 6.15% higher than that of A and C treatments.
Practical Implications: These results indicate that fertiliser management could significantly increase SR production, leading to higher SR at high fertiliser amounts. The present results suggest that adding fertilisers with different amounts to these dry-wet soil conditions would result in SR variations across the Seleite experimental fields. However, the sensitivity of SR to SM increased when fertilisers were incorporated in the soil. Therefore, the management of fertilisers by using different amounts could prevent soil moisture losses through the enhancement of soil conditions, depending on irrigation.
Citation: Mohammed. A. B. G., Yi. Z. C. and Saad. S. A. M.: Impact of Fertilisation Management and Soil Conditions on Soil Respiration in a Semi-Arid Environment of Seleite Farm-Sudan. In Allam Ahmed(Ed.): Home-Books-Proceedings-SDC, Vol. 1, pp. 12 - 13. WASD: Brighton, United Kingdom.