EFFECTS OF BUFFEL GRASS (Pennisetum ciliare) AND GUINEA GRASS (Megathyrsus maximus) ECOTYPES ON GROUND COVER AND SELECT SOIL PROPERTIES IN SEMI-ARID KENYA

Bosco Kidake Kisambo, George Njomo Karuku, Oliver Vivian Wasonga, Oscar Kipchirchir Koech

Abstract


Background: Healthy soils are the key to the sustainability of dryland ecosystems. In semi-arid Kenya, indigenous rangeland grasses have been widely used to rehabilitate degraded lands with the aim of enhancing grass cover as well as enhancing soil quality and other ecosystem services. Objective: To assess the effects on ground or soil cover and soil physical and chemical properties of four indigenous grass ecotypes of two common rangeland grass species (Pennisetum. ciliare and Megathyrsus maximus) (Jacq.) B. K. Simon & S. W. L. Jacobs (Syn. Panicum maximum Jacq.), used for fodder and rangeland rehabilitation in semi-arid Kenya, four years after their establishment. Methodology: A field experiment was carried out in semi-arid southeastern Kenya comprising 4 grass ecotypes namely P. ciliare KLF, P. ciliare MGD, M. maximus ISY and M. maximus TVT). These were grown in a rhodic-ferralsol for determination of ground cover attributes and selected soil properties after 4 years. Soil samples were collected up to a depth of 30 cm in the established pastures and analyzed for bulk density, moisture content, pH, soil organic carbon (SOC), Total Nitrogen (TN) and elemental composition [Phosphorus (P), Potassium (K), Calcium (Ca) and Magnesium (Mg)]. Soil micronutrient status [Manganese (Mn), Copper (Cu), Iron (Fe), Zinc (Zn), Sodium (Na)] were also determined. Results: Inferences were made in comparison with conditions before the establishment of the grasses and comparison among the different grass ecotypes. Overall grass cover ranged between 52 and 85 % among the grass ecotypes, reflecting the importance of indigenous grasses in improving ground cover and rangeland rehabilitation. An improvement in SOC, N, K, Cu, Fe and Zn contents was observed. A decline was however observed in soil P, Mn and Na contents. Divergent responses were observed among the grass ecotypes in terms of soil attributes. Implications: The growing of indigenous grasses has the capacity and potential to improve soil conditions in the short term (< 5 years) and hence the productivity of semi-arid grasslands. Evidence is provided to guide decisions on the suitability of grasses for improving soil attributes in addition to enhancing forage productivity in semi-arid rangelands. Conclusion: The grass ecotypes enhanced the ground cover and improved certain soil properties over the 4-year period. In particular, there was an improvement in the soil organic contents, TN, Ca, Mg and K status of the soil.    

Keywords


Carbon; grassland; nitrogen; pasture; perennial grasses; range rehabilitation; restoration.

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References


Adjolohoun, S., Zoffoun, A.G., Adandédjan, C., Toléba, S.S., Dagbénonbakin, G. and Sinsin, B., 2014. Influence of Panicum maximum ecotypes on plant root growth and soil chemical characteristics after 3-year study in Soudanian region of West Africa. Archives of Agronomy and Soil Science, 60(1), pp. 75–86. https://doi.org/10.1080/03650340.2013.770146

Athira, M., Jagadeeswaran, R. and Kumaraperumal, R., 2019. Influence of soil organic matter on bulk density in Coimbatore soils. International Journal of Chemical Studies, 7(3), pp.3520–3523. https://www.chemijournal.com/archives/2019/vol7issue3/PartBF/7-3-360-895.pdf

Barrow, N.J. and Hartemink, A.E., 2023. The effects of pH on nutrient availability depend on both soils and plants. Plant and Soil, 487(1–2), pp. 21–37. https://doi.org/10.1007/s11104-023-05960-5

Binacchi, F., Rusinamhodzi, L. and Cadisch, G., 2022. The potential of conservation agriculture to improve nitrogen fixation in cowpea under the semi-arid conditions of Kenya. Frontiers in Agronomy, 4, pp. 1–12. https://doi.org/10.3389/fagro.2022.988090

Blake, G.R. and Hartge, K.H., 1986. Bulk density. In: Klute, A., eds., Methods of Soil Analysis, Part 1—Physical and Mineralogical Methods, 2nd Edition, Agronomy Monograph 9, American Society of Agronomy—Soil Science Society of America, Madison, pp. 363-382.

Boitt, G., Black, A., Wakelin, S.A., McDowell, R.W. and Condron, L.M., 2018. Impacts of long-term plant biomass management on soil phosphorus under temperate grassland. Plant and Soil, 427(1–2), pp.163–174. https://doi.org/10.1007/s11104-017-3429-0

Bremner, J.M., 1996. Nitrogen Total. In: Sparks, D.L., eds., Methods of Soil Analysis Part 3: Chemical Methods, SSSA Book Series 5, Soil Science Society of America, Madison, Wisconsin, pp. 1085-1122.

Burke, I.C., Lauenroth, W.K., Cunfer, G., Barrett, J.E., Mosier, A. and Lowe, P., 2002. Nitrogen in the central grasslands region of the United States. BioScience, 52(9), pp. 813–823. https://doi.org/10.1641/0006-3568(2002)052[0813:NITCGR]2.0.CO;2

Carbonell, V., Merbold, L., Diaz-Pines, E., Dowling, T. P. F. and Butterbacj-Bahl, K., 2021. Nitrogen cycling in pastoral livestock systems in Sub-Saharan Africa: knowns and unknowns. Ecological Applications, 31(6), 1–17. https://doi.org/10.1002/eap.2368

CIMMYT, 2013. Kiboko Crops Research Station. A brief and visitors’ guide. https://repository.cimmyt.org/xmlui/bitstream/handle/10883/3396/98523.pdf?sequence=1&isAllowed=y

Dhaliwal, S.S., Sharma, V., Mandal, A., Naresh, R.K. and Verma, G., 2021. Improving soil micronutrient availability under organic farming In: V.S. Meena, S.K. Meena, A. Rakshit, J. Stanley and C. H. Srinivasarao, eds. Advances in organic farming, vol. 1: Cambridge, UK: Woodhead Publishing, Cambridge, UK (2021). 93–114. https://doi.org/10.1016/B978-0-12-822358-1.00002-X

Ghosh P.K., Mahanta S.K. and Ram S.N., 2017. Nitrogen Dynamics in Grasslands. In Yash P. A., Tapan K. A., Viney P. A, Nandula R., Himanshu P, Umesh K, Chhemendra S. and Singh B., eds. The Indian Nitrogen Assessment, Elsevier, Pages 187-205. https://doi.org/10.1016/B978-0-12-811836-8.00013-6

Gichangi, E.M., Njarui, D.M.G., Ghimire, S.R., Gatheru, M. and Magiroi, M.K.N., 2016. Effects of cultivated Brachiaria grasses on soil aggregation and stability in the Semi-Arid Tropics of Kenya. Tropical and Subtropical Agroecosystems, 19, pp. 205–217. http://dx.doi.org/10.56369/tsaes.2211

Hassan, N., Abdullah, I., Khan, W., Khan, A., Ahmad, N., Iqbal, B., Ali, I., Hassan, A. M., Dai, D. Q., El-Kahtany, K. and Fahad, S., 2024. Effect of Grazing and Mowing on Soil Physiochemical Properties in a Semi-Arid Grassland of Northeast China. Polish Journal of Environmental Studies, 33(2), pp. 1725–1735. https://doi.org/10.15244/pjoes/173163

Hicks, P.C.E., Ryals, R., Zhu, B., Min, K., Cooper, A., Goldsmith, S., Pett-Ridge, J., Torn, M. and Berhe, A.A., 2023. The deep soil organic carbon response to global change. Annual Review of Ecology, Evolution, and Systematics, 54, 375–401. https://doi.org/10.1146/annurev-ecolsys-102320-085332

Hinga, F.N., Muchena, F.N. and Njihia, M., 1980: Physical and Chemical methods of analysis. National Agricultural Research laboratories, MoA, Kenya.

Kamiri, H.W., Mutuku, D., Ndufa, J. and Kiama, S., 2022. Exploring the distribution of soil properties across an open-grazed pastoral system in Laikipia rangelands, Kenya. Arid Land Research and Management, 36(4), pp. 465–482. https://doi.org/10.1080/15324982.2022.2039976

Karuku, G. and Mochoge, B.O., 2018. Nitrogen mineralization potential (No) in three Kenyan soils: Andosls, Ferralsols and Luvisols. Journal of Agricultural Science, 10(4), pp 69-78. https://doi.org/10.5539/jas.v10n4p69

Kidake, B.K., Manyeki J.K., Kubasu D. and Mnene W.N., 2016. Promotion of range pasture and fodder production among the pastoral and agro-pastoral communities in Kenyan rangelands: Experiences and lessons learnt. Livestock Research for Rural Development, 28 Article #154. http://www.lrrd.org/lrrd28/8/kida28151.html

Kinama, J.M., Stigter, C.J., Ong, C.K., Ng’ang’a, J.K. and Gichuki, F.N., 2007. Contour hedgerows and grass strips in erosion and runoff control on sloping land in semi-arid Kenya. Arid Land Research and Management, 21(1), pp. 1–19. https://doi.org/10.1080/15324980601074545

Kirwa, E.C., 2019. Evaluation of grass ecotypes for potential use in reseeding pastoral fields in the arid and semi-arid lands of Kenya. PhD. Thesis, University of Nairobi. http://erepository.uonbi.ac.ke/handle/11295/106671

Koech, O.K., Ngugi, K.R., Njomo, K.G., Mwangi, M.S. and Wanjogu, R., 2015. Water use efficiency of six rangeland grasses under varied soil moisture content levels in the arid Tana River County, Kenya. African Journal of Environmental Science and Technology, 9(7), pp. 632–640. https://doi.org/10.5897/AJEST2015.1917

Lu, Q., Ma, H., Zhou, Y., Liu, J. and Shen, Y., 2023. Restoration of soil quality of degraded grassland can be accelerated by reseeding in an arid area of Northwest China. Frontiers in Plant Science, 14, 1–14. https://doi.org/10.3389/fpls.2023.1101295

Lubajo Bosco, W. and Karuku, G.N., 2022. Effect of deficit irrigation regimes on growth, yield, and water use efficiency of maize (Zea mays) in the semiarid area of Kiboko, Kenya. Tropical and Subtropical Agroecosystems 25(1), pp.#34. http://dx.doi.org/10.56369/tsaes.3966

Lugusa, K. O., 2015. Fodder production as an adaptive strategy in the drylands: a case study of producer groups in Baringo County, Kenya. MSc Thesis, University of Nairobi. http://erepository.uonbi.ac.ke/handle/11295/94363

Mayel, S., Jarrah, M. and Kuka, K., 2021. How does grassland management affect physical and biochemical properties of temperate grassland soils? A review study. Grass and Forage Science, 76(2), pp. 215–244. https://doi.org/10.1111/gfs.12512

Mbayaki, C.W. and Karuku, G.N., 2022. Soil hydraulic properties of a chromic luvisol in Katumani, Kenya. Tropical and Subtropical Agroecosystems, 25(3), pp.#094. http://dx.doi.org/10.56369/tsaes.4200

McIvor, J. G. and Gardener, C. J., 1995. Pasture management in semi-arid tropical woodlands: Effects on herbage yields and botanical composition. Australian Journal of Experimental Agriculture, 35(6), pp. 705–715. https://doi.org/10.1071/EA9950705

Mehlich, A., 1953. Determination of P, Ca, Mg, K, Na, and NH4 North Carolina Soil Test Division (Mimeo 1953). North Carolina Dep. of Agric., Raleigh, NC

Mganga, K.Z., 2010a. Impact of grass reseeding technology on rehabilitation of rangelands: Case Study of Kibwezi District, Kenya. MSc. Thesis, University of Nairobi.

Mganga, K.Z., Musimba, N.K.R., Nyangito, M.M., Nyariki, D.M. and Mwangombe, A.W., 2010b. Improving hydrological responses of degraded soils in semi-arid Kenya. Journal of Environment Science and Technology, 3(4), pp. 217–225. https://scialert.net/abstract/?doi=jest.2010.217.225

Mganga, K.Z., Musimba, N.K.R., Nyariki, D.M. and Nyangito, M.M., 2013. The choice of grass species to combat desertification in semi-arid Kenyan rangelands is greatly influenced by their forage value for livestock. Grass and Forage Science, 70(1), pp. 1–7. https://doi.org/10.1111/gfs.12089

Mganga, K.Z., Nyariki, D.M., Musimba, N.K.R. and Mwang’ombe, A.W. (2019). Indigenous grasses for rehabilitating degraded African drylands. In: Bamutaze, Y., Kyamanywa, S., Singh, B., Nabanoga, G., Lal, R., eds. Agriculture and Ecosystem Resilience in Sub Saharan Africa. Climate Change Management. Springer, Cham. Pp. 53-68 https://doi.org/10.1007/978-3-030-12974-3_3

Mnene, W.N., 2006. Strategies to increase success rates in natural pasture improvement through Re-seeding degraded semi-arid rangelands of Kenya. PhD. Thesis, University of Nairobi. http://erepository.uonbi.ac.ke/handle/11295/21122

Muindi, M.E., 2019. Understanding soil phosphorus. International Journal of Plant and Soil Science, 31 (2), pp.1–18. https://doi.org/10.9734/ijpss/2019/v31i230208

Mulinge, W., Gicheru, P., Murithi, F., Maingi P., Kihiu, E. N., Kirui O. K. and Mirzabaev A., 2016. Economics of Land Degradation and Improvement in Kenya. In: Nkonya, E., Mirzabaev, A., von Braun, J., eds. Economics of Land Degradation and Improvement – A Global Assessment for Sustainable Development. Springer, Cham. https://doi.org/10.1007/978-3-319-19168-3_16

Mureithi, S.M., Verdoodt, A., Gachene, C.K.K., Njoka, J.T., Wasonga, V.O., De Neve, S., Meyerhoff, E. and Van Ranst, E., 2014a. Impact of enclosure management on soil properties and microbial biomass in a restored semi-arid rangeland, Kenya. Journal of Arid Land, 6(5), pp. 561–570. https://doi.org/10.1007/s40333-014-0065-x

Mureithi, S.M., Verdoodt, A., Njoka, J.T., Gachene, C.K.K., Warinwa, F. and Van Ranst, E., 2014b. Impact of community conservation management on herbaceous layer and soil nutrients in a Kenyan semi-arid savannah. Land Degradation and Development 27(8), pp. 1820-1830. https://doi.org/10.1002/ldr.2315

Murphy, C.A., Foster, B.L., Ramspott, M.E. and Price, K.P., 2004. Grassland management effects on soil bulk density. Transactions of the Kansas Academy of Science, 107(1 & 2), pp 45–54. https://doi.org/10.1660/0022-8443(2004)107[0045:gmeosb]2.0.co;2

Ndathi, A.J.N., 2012. Climate variability and livestock feeding strategies in the agro-pastoral systems of Southeastern Kenya. PhD. Thesis, University of Nairobi. http://erepository.uonbi.ac.ke/handle/11295/8411

Nelson, D.W. and Sommers L E., 1982. Total carbon, organic carbon, and organic matter. In Klute, A (Ed.), Methods of soil analysis, Part 1—Physical and Mineralogical Methods (2nd Edition). ASA-SSSA, Madison, pp 595-579.

Nicholson, S.E., Fink, A.H., Funksharon, C., Klotter, D.A. and Satheesh, A.R., 2022. Meteorological causes of the catastrophic rains of October/November 2019 in equatorial Africa. Global and Planetary Change, 208, 103687. https://doi.org/10.1016/j.gloplacha.2021.103687

Oduor, C.O., Karanja, N.K., Onwonga, R.N., Mureithi, S.M., Pelster, D. and Nyberg, G., 2018. Enhancing soil organic carbon, particulate organic carbon and microbial biomass in semi?arid rangeland using pasture enclosures. BMC Ecology 18(45), pp. 1–9. https://doi.org/10.1186/s12898-018-0202-z

Raimi, A., Adeleke, R. and Roopnarain, A., 2017. Soil fertility challenges and Biofertiliser as a viable alternative for increasing smallholder farmer crop productivity in sub-Saharan Africa. Cogent Food and Agriculture, 3(1) 400933. https://doi.org/10.1080/23311932.2017.1400933

Rengel, Z., 2015. Availability of Mn, Zn and Fe in the rhizosphere. Journal of Soil Science and Plant Nutrition, 15(2), pp. 397–409. https://doi.org/10.4067/s0718-95162015005000036

Rumpel, C., Crème, A., Ngo, P.T., Velásquez, G., Mora, M.L. and Chabbi, A., 2015. The impact of grassland management on biogeochemical cycles involving carbon, nitrogen and phosphorus. Journal of Soil Science and Plant Nutrition, 15(2), pp. 353-371.

Saleem, M., Pervaiz, Z.H., Conteras, J., Lindenberger, J.H., Hupp, B.M., Chen, D., Zhang, Q., Wang, C., Iqbal, J. and Twig, P., 2020. Cover crop diversity improves multiple soil properties via altering root architectural traits. Rhizosphere, 16, pp.100248. https://doi.org/10.1016/j.rhisph.2020.100248

Sanaullah, M., Chabbi, A., Lemaire, G., Charrier, X. and Rumpel, C., 2010. How does plant leaf senescence of grassland species influence decomposition kinetics and litter compounds dynamics? Nutrient Cycling in Agroecosystems, 88(2), pp. 159–171. https://doi.org/10.1007/s10705-009-9323-2

Sanjari, G., Ghadiri, H. and Yu, B., 2016. Effects of time-controlled and continuous grazing on total herbage mass and ground cover. Journal of Agriculture and Rural Development in the Tropics and Subtropics, 117(1), pp. 165–174. https://www.jarts.info/index.php/jarts/article/view/2016041950145/876

Sattari, S.Z., Bouwman, A. F., Martinez Rodríguez, R., Beusen, A.H.W. and Van Ittersum, M.K., 2016. Negative global phosphorus budgets challenge sustainable intensification of grasslands. Nature Communications, 7, pp. 10696. https://doi.org/10.1038/ncomms10696

Schlautman, B., Bartel, C., Diaz-Garcia, L., Fei, S., Flynn, S., Haramoto, E., Moore, K. and Raman, D.R., 2021. Perennial groundcovers: An emerging technology for soil conservation and the sustainable intensification of agriculture. Emerging Topics in Life Sciences, 5(2), pp. 337–347. https://doi.org/10.1042/ETLS20200318

Singh, P.D., Kumar, A., Dhyani, B., Kumar, S., Shahi, U., Singh, A. and Singh, A., 2020. Relationship between compaction levels (bulk density) and chemical properties of different textured soil. International Journal of Chemical Studies, 8(5), pp. 179–183. https://doi.org/10.22271/chemi.2020.v8.i5c.10294

Song, X., Wang, P., Zwieten, L. Van, Bolan, N., Wang, H., Li, X. and Cheng, K., 2022. Towards a better understanding of the role of Fe cycling in soil for carbon stabilization and degradation. Carbon Research, 1(5), pp. 1–16. https://d0i.org/10.1007/s44246-022-00008-2

Wainwright, C.W., Finney D.N., Kilavi, M., Black, E. and Marshan, J.H., 2021. Extreme rainfall in East Africa, October 2019 - January 2020 and context under future climate change. Weather, 76 (1) pp. 26-31. https://doi.org/10.1002/wea.3824

Wang, L., Xu, H., Zhang, H. and Zhang, Y., 2022. Grazing and mowing affect the carbon-to-nitrogen ratio of plants by changing the soil available nitrogen content and soil moisture on the Meadow Steppe, China. Plants, 11(286). https://doi.org/10.3390/plants11030286

Washaya, S. and Washaya, D.D., 2023. Benefits, concerns and prospects of using goat manure in sub-Saharan Africa. Pastoralism, 13(1) pp. 1-13. https://doi.org/10.1186/s13570-023-00288-2

Xie, K., Cakmak, I., Wang, S., Zhang, F. and Guo, S., 2021. Synergistic and antagonistic interactions between potassium and magnesium in higher plants. The Crop Journal, 9(2), pp. 249–256. https://doi.org/10.1016/j.cj.2020.10.005

Yang, X., Wang, B., Fakher, A., An, S. and Kuzyakov, Y., 2023. Contribution of roots to soil organic carbon: From growth to decomposition experiment. Catena, 231, pp. 107317. https://doi.org/10.1016/j.catena.2023.107317

Yu, Y., Wei, W., Chen, L.D., Jia, F.Y., Yang, L., Zhang, H.D. and Feng, T.J., 2015. Responses of vertical soil moisture to rainfall pulses and land uses in a typical loess hilly area, China. Solid Earth, 6(2), pp. 595–608. https://doi.org/10.5194/se-6-595-2015

Zhao, Y., Liu, Z. and Wu, J., 2020. Grassland ecosystem services: a systematic review of research advances and future directions. Landscape Ecology, 35(4), pp. 793–814. https://doi.org/10.1007/s10980-020-00980-3

Zuazo, V.H.D. and Pleguezuielo, C.R.R., 2008. Soil erosion and runoff prevention by plant covers. A review. Agronomy for Sustainable Development, 28 (1), pp. 65–86. https://doi.org/10.1051/agro:2007062




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DOI: http://dx.doi.org/10.56369/tsaes.5666



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