Abstract
Soil and water conservation is a major challenge for the development of sustainable agriculture. Leaching and runoff of soil nutrients and fine particles negatively impact soil fertility, soil quality, and contribute to surface water eutrophication and sediment accumulation. Such issues are especially critical in a tropical or subtropical region, such as in south Florida with high rainfall and shallow aquifer. So far, little is known about soil particle and nutrient retention by cover cropping under contrasting rainfall intensity. Here, a pot experiment was conducted with four cover crops and two simulated rainfall rates, a low rate of 5.8 mm day−1 and a high rate of 11.6 mm day−1, to study the transport of N, P, and fine soil particles down the soil profile. The cover crops were sunn hemp, velvetbean, cowpea, and sorghum sudangrass in contrast to weedy fallow as a control. Results show that under low rainfall rate, total N in leachates of 0.5–1.9 kg ha−1 for cover crops was much lower than 10.2 kg ha−1 for fallow. Under high rainfall rate, total N in leachates ranged from 3.4 to 16.1 kg ha−1 for cover crops and 8.8 kg ha−1 for fallow. Cover cropping with sunn hemp was the most effective at retaining soil nutrients because of its large plant biomass production. Indeed sunn hemp biomass accumulated 376 and 247 kg N ha−1 and 27 and 22 kg P ha−1 under high and low rainfall rates. We also found that soil organic carbon associated with fine soil particles in the root zone under sunn hemp and sorghum sudangrass was 5–7% greater than soil organic carbon in fallow. This study demonstrates that growing sunn hemp and sorghum sudangrass cover crops can conserve soil fine particles and nutrients against leaching and reduce adverse impacts on surface water.
Similar content being viewed by others
References
Bowman RA (1998) A reevaluation of the chromic acid colorimetric procedure for soil organic carbon. Comm Soil Sci Plant Anal 29:501–508
Brandi-Dohrn FM, Dick RP, Hess M, Kauffman SM, Hemphill DD Jr, Selker JS (1997) Nitrate leaching under a cereal rye cover crop. J Environ Qual 26:181–188
Bui EN, Box JE Jr (1992) Stemflow, rain throughfall, and erosion under canopies of corn and sorghum. Soil Sci Soc Am J 56:242–247
Cambardella CA, Elliott ET (1992) Particulate soil organic matter changes across a grassland cultivation sequence. Soil Sci Soc Am J 56:777–783
Campbell CA, Lafond GP, Zentner RP, Jame W (1994) Nitrate leaching in Udic Haploboroll as influenced by fertilization and legumes. J Environ Qual 23:195–201
Causarano H, Franzluebbers AJ, Shaw JN, Reeves DW, Raper RL, Wood CW (2008) Soil organic carbon fractions and aggregation in the southern Piedmont and coastal plain. Soil Sci Soc Am J 72:221–230
Clark AJ, Decker AM, Meisinger JJ, Mulford FR, Mclntosh MS (1995) Hairy vetch kill date effects on soil water and corn production. Agron J 87:579–585
Dorsch RKS, McMichael AJ, Bighurst PA, Dyer KJ (1984) Congenital malformations and maternal drinking water supply in rural South Australia: a case study. Am J Epidemiol 119:473–486
Ebelhar SA, Frye WW, Blevins RL (1984) Nitrogen from legume cover crops for no-till corn. Agron J 76:51–55
Hallberg GR (1989) Nitrate in groundwater in the United States. In: Follett RF (ed) Nitrogen management and groundwater protection. Elsevier, Amsterdam, pp 35–75
Hansen EM, Djurhuus J (1997) Nitrate leaching as influenced by soil tillage and catch crop. Soil Tillage Res 41:203–219
Hansen EM, Djurhuus J, Kristensen K (2000) Nitrate leaching as affected by introduction or discontinuation of cover crop use. J Environ Qual 29:1110–1116
Holderbaum JF, Decker AM, Meisinger JJ, Mulford FR, Vough LR (1990) Fall-seeded legume cover crops for no tillage corn in the humid ease. Agron J 82:193–211
Karlen DL, Doran JW (1991) Cover crop management effects on soybean and corn growth and nitrogen dynamics in an on-farm study. Am J Altern Agric 6:71–82
Kuo S, Jellum EJ, Sainju UM (1995) The effect of winter cover cropping on soil and water quality. Proc Western Nutrient Mgt Conf, Salt Lake City, UT, pp 56–64
Levia DF Jr, Frost EE (2003) A review and evaluation of stemflow literature in the hydrologic and biogeochemical cycles of forested and agricultural ecosystems. J Hydrol 274:1–29
Linville KW, Smith GE (1971) Nitrate content of soil cores from corn plots after repeated nitrogen fertilization. Soil Sci 112:249–255
Martinez J, Guiraud G (1990) A lysimeter study of the effects of a ryegrass catch crop, during a winter wheat/maize rotation, on nitrate leaching and on the following crop. J Soil Sci 41:5–16
McCracken DV, Smith MS, Grove JH, MacKown CT, Blevins RL (1994) Nitrate leaching as influenced by cover cropping and nitrogen source. Soil Sci Soc Am J 58:1476–1483
McVay KA, Radcliffe DE, Hargrove WH (1989) Winter legume effects on soil properties and nitrogen fertilizer requirements. Soil Sci Soc Am J 53:1856–1862
Meisinger JJ, Hargrove WL, Mikkelson RL Jr, Williams JR, Benson VW (1991) Effects of cover crops on groundwater quality. In: Hargrove WL (ed) Cover crops for clean water. Soil Water Conserv. Soc, Ankeny, IA, pp 57–68
Miller MH, Beauchamp EG, Lauzon JD (1994) Leaching of nitrogen and phosphorus from the biomass of three cover crop species. J Environ Qual 23:267–272
Miller MH, Vyn TJ, Stewart GA, Lauzon JD, Raudra R (1992) The use of cover crops for nutrient conservation. Rapport final PAMPA, no. 42. Ontario, Canada.
Miller WP, Miller DM (1987) A micro-pipette method for soil mechanical analysis. Comm Soil Sci Plant Anal 18:1–15
Nielsen EG, Lee LK (1987) The management and costs of groundwater contamination from agricultural chemicals: a national perspective. Agric. Econ. Rep. 576. USDA Econ. Res. Serv. Washington, D.C.
Plante AF, Conant RT, Stewart CE, Paustian K, Six J (2006) Impact of soil texture on the distribution of soil organic matter in physical and chemical fractions. Soil Sci Soc Am J 70:287–296
Power JF, Doran JW (1988) Role of crop residue management in nitrogen cycling and use. In: Hargrove W.L. et al. (eds.) Cropping strategies for efficient use of water and nitrogen. ASA Spec. Publ. 51. ASA, CSSA, and SSSA, Madison, WI, pp. 103–113.
Sainju UM, Singh BP, Wayne FW, Wang S (2006) Carbon supply and storage in tilled and nontilled soils as influenced by cover crops and nitrogen fertilization. J Environ Qual 35:1507–1517
SAS Institute (2004) SAS, version 9.1.3. Cary, NC
Schreiber JD, McDowell LL (1985) Leaching of nitrogen, phosphorus, and organic carbon from wheat straw residues: I. rainfall intensity. J Environ Qual 14:251–256
Six J, Elliott ET, Paustian K (2000) Soil macroaggregate turnover and microaggregate formation: a mechanism for C sequestration under no-tillage agriculture. Soil Bio Biochem 32:2099–2103
US EPA (1993) Methods for chemical analysis of water and wastes. Environ. Monit. Support Lab, Cincinnati, OH
USDA (1996) Soil survey of Dade County area. USDA Natural Resources Conservation Service, Florida
Wang D, Anderson DW (1998) Direct measurement of organic carbon content in soils by the Leco CR-12 carbon analyzer. Comm Soil Sci Plant Anal 29:15–21
Wang Q, Li Y, Klassen W (2005) Influence of summer cover crops on conservation of soil water and nutrients in a subtropical area. J Soil Water Conserv 60:58–63
Wang Q, Klassen W, Li Y, Codallo M (2009) Cover crops and organic mulch to improve tomato yields and soil fertility. Agron J 101:345–351
Wang Q, Li Y, Klassen W, Handoo Z (2007) Influence of cover crops and soil organic amendments on okra (Abelmoschus esculentus L.) production and soil nematodes. Renew Agric Food Syst 22:41–53
Wang Q, Bryan HH, Abdul-Baki AA, Klassen W, Li Y, Codallo M (2003a) Improved tomato production with summer cover crops and reduced irrigation rates. Proc Fla State Hort Soc 115:202–207
Wang Q, Li Y, Klassen W (2003b) Effect of soil amendments at a heavy loading rate associated with cover crops as green manures on the leaching of nutrients and heavy metals from a calcareous soil. J Environ Sci Health B 38:865–881
Wang Q, Li Y, Wang Y (2010) Optimizing the weight loss-on-ignition methodology to quantify organic and carbonate carbon of sediments from diverse sources. Environ Monit Assess. doi:10.1007/s10661-010-1454-z
White EM (1973) Water leachable nutrients from frozen or dried prairie vegetation. J Environ Qual 2:104–107
Acknowledgments
The research was supported by Institute of Food and Agricultural Sciences, the Florida Agricultural Experiment Station, and by a cooperative agreement with the USDA-ARS.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Wang, Q., Li, Y., Klassen, W. et al. High retention of N P nutrients, soil organic carbon, and fine particles by cover crops under tropical climate. Agron. Sustain. Dev. 32, 781–790 (2012). https://doi.org/10.1007/s13593-011-0054-9
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13593-011-0054-9