The maximum and minimum soil temperatures for all planting
dates were not consistent across all planting dates during the emergence phase with the maximum temperature under film covered
plots being warmer, except for planting 2 (2/10/2012) which was
cooler, than the bare soil and the minimum temperatures being the
mirror image (Table 2). The third planting’s maximum soil temperature was 6.6 ◦C higher than the control, and the soil was drier.
Measured soil water potential indicated that the film covered plots
were drier than the bare plots for the first and third planting date
(18/10/2012). This was due to early slitting the film to allow the
seedlings to grow (Table 2).
Plant establishment was more uniform under the film compared
with the control with the final establishment of 10–12 plants m−1
being similar for all planting dates, except for F2 at the third plant
date (Table 4). There was a significant interaction between planting
date and treatment in plant establishment due to the combination
of temperature under the film and soil water and timing of slitting
the film, which resulted in seedling desiccation and non-survival
of plants with the last planting date (Table 4). Lint yield and fibre
quality are presented in Table 4. There were no significant statistical differences between planting dates or treatments in lint yield
or fibre quality parameters, except for fibre strength, which significantly differed with planting date (all quality parameters met base
grade for Australian cotton).
The maximum and minimum soil temperatures for all plantingdates were not consistent across all planting dates during the emergence phase with the maximum temperature under film coveredplots being warmer, except for planting 2 (2/10/2012) which wascooler, than the bare soil and the minimum temperatures being themirror image (Table 2). The third planting’s maximum soil temperature was 6.6 ◦C higher than the control, and the soil was drier.Measured soil water potential indicated that the film covered plotswere drier than the bare plots for the first and third planting date(18/10/2012). This was due to early slitting the film to allow theseedlings to grow (Table 2).Plant establishment was more uniform under the film comparedwith the control with the final establishment of 10–12 plants m−1being similar for all planting dates, except for F2 at the third plantdate (Table 4). There was a significant interaction between plantingdate and treatment in plant establishment due to the combinationof temperature under the film and soil water and timing of slittingthe film, which resulted in seedling desiccation and non-survivalof plants with the last planting date (Table 4). Lint yield and fibrequality are presented in Table 4. There were no significant statistical differences between planting dates or treatments in lint yieldor fibre quality parameters, except for fibre strength, which significantly differed with planting date (all quality parameters met basegrade for Australian cotton).
การแปล กรุณารอสักครู่..
