
TY  - JOUR
A1  - Konboon, Yothin 
A1  - Blair, Graeme 
A1  - Lefroy, Rod 
A1  - Whitbread, Anthony 
T1  - Tracing the nitrogen, sulfur, and carbon released from plant residues in a soil/plant system
JF  - Soil Research
JO  - Soil Res.
Y1  - 2000
VL  - 38
IS  - 3
SP  - 699
EP  - 710
KW  - 
UR  - https://doi.org/10.1071/SR99075 
N2  - Matching plant residue mineralisation rate to plant nutrient demand is one way of increasing the efficiency of nutrient cycling. A glasshouse experiment was conducted in a Soloth soil with a C4d13 C signature using drained pots to examine the effect on the yield of Japanese millet (Echinochloa frumentocea) and the fate of 15 N, 35 S, and C (using d 13 C shift) from the C 3 plants Flemingia macrophylla, Medicago truncatula hay, and wheat (Triticum aestivum) straw applied at 3 t/ha in the presence of N and NPKS fertiliser. The yield of Japanese millet at 91 days was highest where medic hay had been added (13.7 g/pot) and lowest where wheat straw was used (11.5 g/pot). Recovery of 35 S by the millet was highest in the wheat straw and medic hay treatments (mean 11.5%), whilst recovery of 15 N was highest from medic hay (15.8%). Leaching losses of 35 S were highest in the Flemingia and medic treatments (mean 8.1%), and 15 N loss in leachate was highest in the medic hay treatment (6.6%). A maximum of 1.5% of the C added in residues was recovered in the leachate of the medic hay treatment. 
ER  -

