Abstract
Aims
Perennial forage grass production has the potential to improve smallholder livelihoods in the tropics. However, nutrient management is often challenging, especially on infertile sandy soils. This study tested whether typical nutrient management limits the productivity and sustainability of perennial forage grass systems on sandy soils.
Methods
Nutrient balances were estimated for four fields of either Megathyrsus maximus cv. Tanzania or Urochloa hybrid Mulato II. Nutrient limitations were then evaluated in a nutrient omission experiment.
Results
All soils were sandy (< 10% clay), neutral to acidic (pH (CaCl2) 4.6 to 6.7) and had plant-limiting concentrations of total nitrogen, extractable potassium and extractable sulfur. Nitrogen inputs were typically higher than outputs, with balances ranging from −16 kg ha−1 yr−1 to 293 kg ha−1 yr−1, yet concentrations in forage shoots were low at all sites. Phosphorus balances ranged from −5 kg ha−1 yr−1 to 77 kg ha−1 yr−1 and concentrations in forage shoots were adequate. Potassium inputs were low, resulting in balances from −79 kg ha−1 yr−1 to −138 kg ha−1 yr−1 at locations that did not apply inorganic potassium fertilizer. Potassium concentrations in forage shoots were low and omission of potassium resulted in severely depressed biomass production. Inorganic sulfur fertilizers were not applied to forages and the sulfur balance varied from −1 kg ha−1 yr−1 to −24 kg ha−1 yr−1. Sulfur concentrations in shoots were correspondingly low and production was depressed when sulfur was omitted in the experiment.
Conclusion
Balanced nutrition was not achieved, despite substantial fertilizer inputs, resulting in deficiencies of potassium and sulfur, inefficient use of nitrogen and excesses of phosphorus. If current practices continue, potassium and sulfur depletion, phosphorus accumulation and soil acidification can be expected. Recommendations for balanced nutrient management that accounts for high rates of removal in biomass, variable concentrations in organic fertilizers, and leaching potential, are needed to sustain the productivity of perennial forages on tropical sandy soils.
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References
Ashley K, Wilson S, Young JR, Chan HP, Vitou S, Suon S, Windsor PA, Bush RD (2018) Drivers, challenges and opportunities of forage technology adoption by smallholder cattle households in Cambodia. Trop Anim Health Prod 50:63–73. https://doi.org/10.1007/s11250-017-1400-y
Bell RW, Seng V (2004) Rainfed lowland rice-growing soils of Cambodia, Laos and Northeast Thailand. In: Seng V, Craswell E, Fukai S, Fischer K (eds) Water in agriculture. Phnom Penh, Cambodia, pp 161–173
Bell R, Seng V, Schoknecht N, Vance W, Hin S (2005) Assessing land suitability for crop diversification in Cambodia. Proceedings of the land resource assessment forum, CARDI, Cambodia 23–26 September
Bell RW, Seng V, Schoknecht N, Vance W, Hin S (2007) Soil survey of the district of tram Kak, province of Takeo, the Kingdom of Cambodia. Cambodian Agricultural Research and Development Institute, Phnom Penh
Blair G, Blair N (2014) Nutrient status of Cambodian soils, rationalisation of fertiliser recommendations and the challenges ahead for Cambodian soil science. Curr Agri Res 2(1):5–13. https://doi.org/10.12944/CARJ.2.1.02
Blair GJ, Chinoim N, Lefroy RDB, Anderson GC, Crocker GJ (1991) A soil sulfur test for pasture and crops. Aust J Soil Res 29:619–629. https://doi.org/10.1071/SR9910619
Bouman BAM, Castañeda AR, Bhuiyan SI (2002) Nitrate and pesticide contamination of groundwater under rice-based cropping systems: past and current evidence from the Philippines. Agric Ecosyst Environ 92(2–3):185–199. https://doi.org/10.1016/S0167-8809(01)00297-3
Colwell JD (1963) The estimation of the phosphorus fertilizer requirements of wheat in southern New South Wales by soil analysis. Aust J Exp Agric Anim Husb 3:190–198. https://doi.org/10.1071/EA9630190
Cook BG, Pengelly BC, Brown SD, Donnelly JL, Eagles DA, Franco MA, Hanson J, Mullen BF, Partridge IJ, Peters M, Schultze-Kraft R (2005) Tropical forages: an interactive selection tool. CD-ROM, CSIRO, DPI&F(Qld), CIAT and ILRI, Brisbane
Cornish PS, Birchall C, Herridge DF, Denton MD, Guppy C (2018) Rainfall-related opportunities, risks and constraints to rainfed cropping in the central dry zone of Myanmar as defined by soil water balance modelling. Agric Syst 164:47–57. https://doi.org/10.1016/j.agsy.2018.04.003
Corrêa L, Haag H (1993) Critical levels of phosphorus for the establishment of pasture grasses on a red yellow Latosol. I: greenhouse test. Sci Agric 50(1):99–108. https://doi.org/10.1590/S0103-90161993000100014
Curtin D, Syers JK (1990) Extractability and adsorption of sulphate in soils. J Soil Sci 41:295–304. https://doi.org/10.1111/j.1365-2389.1990.tb00065.x
FAO (2006) Guidelines for soil description, 4th edn. FAO, Rome
Gee GW, Orr D (2002) Particle-size analysis. In: Dane JH, Topp CG (eds) Methods of soil analysis. Part 4 physical methods. Soil Science Society of America, Madison, pp 255–293
Hart MR, Cornish PS (2012) Available soil phosphorus, phosphorus buffering index and cover determine most variation in phosphorus concentration in runoff from pastoral sites. Nutr Cycl Agroecosyst 93:227–244. https://doi.org/10.1007/s10705-012-9512-2
Hin S (2019) Acid sands of South-Eastern Cambodia: their origin, properties and management for upland crops. PhD thesis, Murdoch University
Hin S, Bell RW, Newsome D, Seng V (2010) Understanding variability in texture and acidity among sandy soils in Cambodia. In: Gilkes RJ, Prakongkep N (eds) Proceedings 19th world congress of soil science: soil solutions for a changing world. Australian Society of Soil Science Incorporated, Brisbane, pp 50–53
Hoang V, Hoang MT, Bell RW, Mann S, Do TN, Nguyen TT, Ho HC, Pham VB (2015) Integrated nutrient management of annual and perennial crops on sandy coastal plains of south central coast of Vietnam. In: Mann S, Webb MC, Bell RW (eds) Sustainable and profitable crop and livestock systems for south-central coastal Vietnam. ACIAR proceedings no. 143, pp 80–90
Hoang TTH, Do DT, Nguyen HN, Nguyen VB, Mann S, Bell RW (2020) Sulfur management strategies to improve partial sulfur balance with irrigated peanut production on deep sands. Arch Agron Soil Sci. https://doi.org/10.1080/03650340.2020.1798412
Huot C, Zhou Y, Philp JNM, Denton MD (2020) Root depth development in tropical perennial forage grasses is related to root angle, root diameter and leaf area. Plant Soil 456(1):145–158. https://doi.org/10.1007/s11104-020-04701-2
Janssen BH (1974) A double-pot technique for rapid soil testing. Trop Agric 51:161–166
Janssen BH (1990) A double-pot technique as a tool in plant nutrition studies. Dev Plant Soil Sci 41:759–763. https://doi.org/10.1007/978-94-009-0585-6_127
Lisle LM, Lefroy RDB, Blair GJ (2000) Method for rapid assessment of nutrient supply capacity of soils. Commun Soil Sci Plant Anal 31:2627–2633
Magdoff F, Lanyon L, Liebhardt B (1997) Nutrient cycling, transformations, and flows: implications for a more sustainable agriculture. Adv Agron 60:1–73. https://doi.org/10.1016/S0065-2113(08)60600-8
McRoberts KC, Ketterings QM, Parsons D, Hai TT, Quan NH, Ba NX, Nicholson CF, Cherney JR (2016) Impact of forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south-Central Vietnam. Int J Agron 2016:1–14. https://doi.org/10.1155/2016/4709024
Nakamanee G, Srisomporn W, Phengsavanh P, Samson J, Stür W (2008) Sale of fresh forage - a new cash crop for smallholder farmers in Yasothon, Thailand. Trop Grassl 42(2):65–74
Nesbitt HJ (1997) Topography, climate and rice production. In: Nesbitt HJ (ed) Rice production in Cambodia. International Rice Research Institute, Manila, pp 15–21
Nyamangara J, Bergström LF, Piha MI, Giller KE (2003) Fertilizer use efficiency and nitrate leaching in a tropical sandy soil. J Environ Qual 32(2):599–206. https://doi.org/10.2134/jeq2003.5990
Olk DC, Becke M, Linquist BA, Pandey S, Witt C (2008) Integrated nutrient management: experience from rice-based systems in Southeast Asia. In: Aulakh MS, Grant CA (eds) Integrated nutrient management for sustainable crop production. The Haworth Press, Haworth, pp 369–420
Peverill KI, Sparrow LA, Reuter DJ (eds) (1999) Soil analysis: an interpretation manual. CSIRO Publishing, Melbourne
Pheav S, Bell RW, White PF, Kirk GJD (2003) Fate of applied fertilizer phosphorus in a highly weathered sandy soil under lowland rice cropping, and its residual effect. Field Crop Res 81(1):1–16. https://doi.org/10.1016/S0378-4290(02)00191-0
Pheav S, Bell RW, White PF, Kirk GJD (2005) Phosphorus mass balances for successive crops of fertilised rainfed rice on a sandy lowland soil. Nutri Cycl Agroecosyst 73(2–3):277–292. https://doi.org/10.1007/s10705-005-3820-8
Philp JNM, Vance W, Bell RW, Chhay T, Boyd D, Phimphachanhvongsod V (2019) Forage options to sustainably intensify smallholder farming systems on tropical sandy soils. A review. Agron Sustain Dev 39:30. https://doi.org/10.1007/s13593-019-0576-0
Pinkerton A, Smith FW, Lewis DC (1997) Pasture species. In: Reuter DJ, Robinson JB (eds) Plant analysis: an interpretation manual. CSIRO Publishing, Melbourne, pp 287–346
Ragland J, Boonpuckdee L (1987) Fertiliser responses in Northeast Thailand: 1. Literature review and rationale. Thai J Soils Fert 9:65–79
Rao IM, Kerridge PC, Macedo MCM (1996) Nutritional requirements of Brachiaria and adaptation to acid soils. In: Miles JW, Maass BL, Valle CB (eds) Brachiaria: biology, agronomy, and improvement. Centro Internacional de Agricultura Tropical, Cali, pp 53–71
Rengel Z, Tang C, Raphael C, Bowden JW (2000) Understanding subsoil acidification: effect of nitrogen transformation and nitrate leaching. Aust J Soil Res 38:837–849. https://doi.org/10.1071/SR99109
Riley NG, Zhao F-J, McGrath SP (2006) Leaching losses of sulfur from different forms of sulfur fertilizers: a field lysimeter study. Soil Use Manag 18:120–126. https://doi.org/10.1111/j.1475-2743.2002.tb00229.x
Rimkeeree K, Suksaran W, Klum-em K, Nakamanee G, Paothong S, Sengsai A (2010) Good forage crops. Animal Nutrition Division, Department of Livestock Development, Bangkok 33p
Rudel TK, Paul B, White D, Rao IM, Van Der Hoek R, Castro A, Boval M, Lerner A, Schneider L, Peters M (2015) LivestockPlus: forages, sustainable intensification, and food security in the tropics. Ambio 44(7):685–693. https://doi.org/10.1007/s13280-015-0676-2
Seng V, Ros C, Bell RW, White PF, Hin S (2001) Nutrient requirements of rainfed lowland rice in Cambodia. In: Fukai S, Basnayake J (eds) Increased lowland Rice production in the Mekong region. ACIAR proceedings 101
Seng V, Bell RW, White PF, Schoknecht N, Hin S, Vance W (2005) Sandy soils of Cambodia. In: Proceedings of the first international conference on the management of tropical sandy soils. Khon Kaen, Thailand, Nov 2005 (CD-ROM)
Sitthaphanit S, Limpinuntana V, Toomsan B, Panchaban S, Bell RW (2009) Fertiliser strategies for improved nutrient use efficiency on sandy soils in high rainfall regimes. Nutr Cycl Agroecosyst 85(2):123–139. https://doi.org/10.1007/s10705-009-9253-z
Smaling EMA, Stoorvogel JJ, Windmeijer PN (1993) Calculating soil nutrient balances in Africa at different scales: II District scales. Fertil Res 35:237–250. https://doi.org/10.1007/BF00750642
Smith FW, Siregar ME (1983) Sulfur requirements of tropical forages. In: Blair GJ, Till AR (eds) Sulfur in south-east Asian and South Pacific agriculture. University of New England Press, Armidale, pp 76–86
Stür WW, Horne PM, Gabunada FA Jr, Phengsavanh P, Kerridge PC (2002) Forage options for smallholder crop–animal systems in Southeast Asia: working with farmers to find solutions. Agric Syst 71(1–2):75–98. https://doi.org/10.1016/S0308-521X(01)00037-3
Stür W, Khanh TT, Duncan A (2013) Transformation of smallholder beef cattle production in Vietnam. Int J Agric Sustain 11(4):363–381. https://doi.org/10.1080/14735903.2013.779074
Van den Bosch H, Gitari JN, Ogaro VN, Maobe S, Vlaming J (1998) Monitoring nutrient flows and economic performance in African farming systems (NUTMON). II. Tool development. Agric Ecosyst Environ 71(1–3):49–62. https://doi.org/10.1016/S0167-8809(98)00131-5
Vial LK, Molesworth A, Lefroy RDB (2020) Balancing rice and non-rice crops: managing the risks from soil constraints in mainland southeast Asian rice systems. Field Crop Res 246:107677. https://doi.org/10.1016/j.fcr.2019.107677
Vincente-Chandler J (1989) Tropical grasses. In: Plunkett DL, Sprague HB (eds) Detecting mineral nutrient deficiencies in tropical and temperate crops. Westview Press, Boulder, pp 531–553
Walkley A (1947) A critical examination of a rapid method for determining organic carbon in soils: effect of variations in digestion conditions and of inorganic soil constituents. Soil Sci 63:251–263. https://doi.org/10.1097/00010694-194704000-00001
Walkley A, Black IA (1934) An examination of the Degtjareff method for determining organic carbon in soils: effect of variations in digestion conditions and of inorganic soil constituents. Soil Sci 63:251–263. https://doi.org/10.1097/00010694-194704000-00001
White PF, Oberthur T, Pheav S (1997) Soils and rice. In: Nesbitt HJ (ed) Rice production in Cambodia. International Rice Research Institute, Manila, pp 21–29
Zhao C, Degryse F, Gupta V, McLaughlin MJ (2016) Low effective surface area explains slow oxidation of co-granulated elemental sulfur. Soil Sci Soc Am J 80(4):911–918. https://doi.org/10.2136/sssaj2015.09.0337
Acknowledgements
The Australian Centre for International Agricultural Research provided funding for this research through project SMCN.2012.075. The authors thank Sarith Hin, Sodany Srom, Chetra Pheun, Mouykeang Sok, Lina Heang, Huor Heng, Seng Vang and Makara Ouk from the Cambodian Agricultural Research and Development Institute, for their assistance and support with the experiment.
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Philp, J.N.M., Cornish, P.S., Te, K.S.H. et al. Insufficient potassium and sulfur supply threaten the productivity of perennial forage grasses in smallholder farms on tropical sandy soils. Plant Soil 461, 617–630 (2021). https://doi.org/10.1007/s11104-021-04852-w
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DOI: https://doi.org/10.1007/s11104-021-04852-w