Critical Level of Phytoavailable Zinc in Bio Compost-Peat Substrates (Refereed)

Bucher, Annette S.

doi:10.17660/actahortic.1997.450.41

Cited by 1 publication

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“…Nutrient concentrations, pH, EC, total C and bulk densities of the M. ogiformis compost substrates and peat substrates measured initially and after 4, 12 and 17 months of plant growth and recommended range for each nutrient (Bjerggård and Hansen 1985;Bucher and Schenk 1997) are shown in Table 1.…”

Section: Nutrient Concentrations Total C Bulk Density Shrinking Anmentioning

confidence: 99%

Growth ofHedera helixL. Container Plants in Compost Substrates Made withMiscanthus ogiformisHonda Straw and Various N-Sources

Jensen¹,

Leth

Iversen

2001

Compost Science & Utilization

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Ammonium sulfate or urea were added as N-source to shredded straw of Miscanthus ogiformis 'Giganteus' and water was included as control. The combined materials were composted for seven months, and the resulting composts were tested as growth substrates for nursery container plants and compared with fertilized and unfertilized peat substrates. The pH was below recommended level for the compost substrate made with ammonium sulfate and for the unfertilized peat substrate throughout the experiment. Electrical conductivity and concentrations of most nutrients were low and decreased throughout the experiment for all growth substrates. Shrinking of the growth substrates after 4, 12 or 17 months was larger for compost substrates than for peat substrates. Bulk density increased in compost substrates and decreased in peat substrates, while the total loss of C was greater in compost substrates than in peat. Water retention was lower and air volume greater for compost substrate made with ammonium sulfate than for fertilized peat. Algae and mosses did not occur on Miscanthus compost growth substrates in contrast to peat substrates. The shoot length and dry matter of Hedera helix, produced after four and 12 months of growth, and five months following cut back, showed that plants can grow well in compost substrates made of Miscanthus straw and ammonium sulfate or urea. However, the compost substrates could not fully substitute for fertilized or unfertilized peat substrate with respect to dry matter production.

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Section: Nutrient Concentrations Total C Bulk Density Shrinking Anmentioning

confidence: 99%