Brief description
N2O emissions were measured in plots planted with sorghum (Sorghum bicolor L.) following two distinct cropping histories. One crop rotation (hereafter called legume ley pasture-cereal) included two seasons of alfalfa pasture (Medicago sativa, L., summers 2009/2010 and 2010/2011), one season of maize (Zea mays, L., summer 2011/2012) and one season of sulla pasture (Hedysarum coronarium L., winter 2012) prior to sowing sorghum. The other crop rotation (hereafter called grass ley pasture-cereal) consisted of two seasons of a mixed rhodes grass (Chloris gayana, K.) and alfalfa pasture (summers 2009/2010 and 2010/2011), one season of maize (Zea mays, L., summer 2011/2012) and one season of wheat (Triticum aestivum L., winter 2012). Both crops were terminated in November 2012 with all residues returned to the soil as a mulch before being incorporated into the soil with four shallow cultivations.Two N fertilisation rates were tested on each cropping history, resulting in a total of four treatments. The first N application rate was designed to achieve maximum yield potential and was representative of farming practices of the region. The synthetic N rate used in L70 was reduced compared to G100 to assess whether the estimated 30 kg N ha-1 resulting from the mineralisation of the sulla residues would have been available to sorghum.
Data time period: 2012-12-12 to 2013-09-19
Subjects
Crop Rotation |
Environmental Science and Management |
Environmental Sciences |
Greenhouse Gas Emissions |
Kingaroy |
Legumes |
N2O |
Nitrous oxide |
QLD |
Sorghum |
Sulla |
Urea |
Wheat |
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Identifiers
- Local : datalibrarian.158