Effects of crop residues soil type and temperature on emergence and early growth of wheat triticum aestivum cultivar songlen
Jessop, R.S.; Stewart, L.W.
Plant and Soil 74(1): 101-110
ISSN/ISBN: 0032-079X Accession: 005297466
Two controlled environment experiments were conducted to examine the germination and early growth of wheat (T. aestivum L. cv. Songlen) growing under crop residues of rape, sorghum, field pea and wheat. Additional treatments also included were soil type (Lithic Vertic Ustochrept and Plinthustalf) and temperature (8.degree. C and 24.degree. C to simulate winter and autumn sowing conditions). At low temperature, wheat and sorghum residues produced the most adverse effects on germination with all residues reducing emergence at high temperatures. Shoot lengths were also reduced by most residues at high temperatures while root lengths and shoot and root dry weights were unaffected by residue treatments. These results suggest major phytotoxic effects of residues during early growth (up to 14 days after sowing) with, in general, few interactions with soil type or temperature.