Gypsum and Compost Effects on Sugarcane Root Growth, Yield, and Plant Nutrients

Louisiana sugarcane (Saccharum spp.) is produced mainly on heavy-textured soils that offer less than ideal conditions for growth and function of the root system. Cultural practices that improve the soil environment could benefit sugarcane production by increasing root growth and reducing the incidence of ratoon decline. The objective of our research was to determine the effect of gypsum and composted, municipal-biosolids application on root growth, crop yields, and leaf nutrient concentrations of sugarcane grown on a silty clay loam soil. Gypsum mixed into the rows at 2.24, 4.48, and 8.96 Mg ha -1 did not affect (P > 0.05) root growth or cane and sugar yields. Likewise, both subsoil- and within-row applied compost at a rate of 44.8 Mg ha -1 did not affect cane or sugar yields compared with the control. Gypsum increased Ca, S, Mn, and Zn leaf concentrations, but had no effect on N, P, K, Mg, Cu, and Fe concentrations. Subsoil and within-row compost increased leaf S concentration; within-row compost increased leaf K; and subsoil compost increased leaf Zn, but reduced leaf Mn compared with the control. Compost application did not increase Mn, Cu, Fe, or Zn concentrations in sugarcane leaf tissue beyond acceptable limits. Within-row applied compost reduced (P < 0.05) root surface area compared with the control, and reduced sugar yields compared with the subsoil compost treatment. This suggests that, at the compost rate used in our study, subsoil rather than within-row application of compost, is the preferred practice for sugarcane grown on this soil.

[1]  Stamatis Stamatiadis,et al.  Field assessment of soil quality as affected by compost and fertilizer application in a broccoli field (San Benito County, California) , 1999 .

[2]  W. Ko,et al.  The role of calcium and microorganisms in suppression of cucumber damping-off caused by Pythium splendens in a Hawaiian soil , 1986 .

[3]  C. E. Carter.  Excess water decreases cane and sugar yields , 1977 .

[4]  R. H. Brupbacher.  Analytical methods and procedures used in the soil testing laboratory , 1968 .

[5]  G. P. Meade,et al.  Cane sugar handbook. , 1977 .

[6]  E. Schulte,et al.  Digestion of plant tissue for analysis by ICP emission spectroscopy , 1985 .

[7]  P. Stoffella,et al.  Composts from various municipal solid waste feedstocks affect vegetable crops. II. Growth, yields, and fruit quality. , 1997 .

[8]  D. Crowley,et al.  Agronomic approaches for improving the micronutrient density in edible portions of field crops , 1999 .

[9]  M. Tabatabai.  Soil Organic Matter: Biological and Ecological Effects , 1988 .

[10]  W. Pan,et al.  Root Quantification by Edge Discrimination Using a Desktop Scanner , 1991 .

[11]  T. DeLuca,et al.  COMPOSTING FOR FEEDLOT MANURE MANAGEMENT AND SOIL QUALITY , 1997 .

[12]  W. Lindsay,et al.  Development of a DTPA soil test for zinc, iron, manganese and copper , 1978 .

[13]  Harry A. J. Hoitink,et al.  Basis for the control of soilborne plant pathogens with composts , 1986 .

[14]  H. Hoitink,et al.  Compost-induced systemic acquired resistance in cucumber to Pythium root rot and anthracnose. , 1996 .

[15]  M. Watson,et al.  Plant Analysis Handbook: A Practical Sampling, Preparation, Analysis, and Interpretation Guide , 1992 .

[16]  P. Warman,et al.  Yield, vitamin and mineral contents of organically and conventionally grown carrots and cabbage , 1997 .

[17]  N. Dissanayake,et al.  Organic Material Soil Amendment Effects on Root Rot and Sugarcane Growth and Characterization of the Materials. , 1999, Plant disease.

[18]  M. Saigusa,et al.  Long‐term Effects of Gypsum on Crop Yield and Subsoil Chemical Properties , 1999 .

[19]  T. Widmer,et al.  Impact of soil health management practices on soilborne pathogens, nematodes and root diseases of vegetable crops , 2000 .

[20]  P. Martín-Olmedo,et al.  Testing low-quality urban composts for agriculture: germination and seedling performance of plants , 1995 .

[21]  V. Mellano,et al.  Cumulative effects of sludge compost on crop yields and soil properties , 1994 .

[22]  W. Dick,et al.  Transport and plant uptake of soil-applied dry flue gas desulfurization by-products , 1996 .

[23]  B. Radford,et al.  Effects of tillage, stubble, gypsum, and nitrogen fertiliser on cereal cropping on a red-brown earth in south-west Queensland , 1995 .