Abstract
Good germination is a basic requirement for successful sugarcane production. To predict crop emergence and manage early crop development it is necessary to understand the factors that affect germination and early growth. The minimum temperature for bud germination used in the CANEGRO and APSIM crop models is 10°C, based on leaf emergence studies. As the base temperature for emergence for South African cultivars has not been documented previously, a study was initiated to examine the effect of temperature, soil moisture, soil fertility and seed lot on the emergence of cultivars NCo376, N16, N27 and non-fertilised N27. Carefully selected setts were planted in trays filled with soil of 0, 7 and 21% clay content, in glasshouse cubicles which were set at 30°C, 25°C, 20°C and 15°C, respectively. A set of planted trays was kept dry while the rest were irrigated according to evaporative demand. Bud emergence from a 60 mm planting depth peaked at 14, 22 and 56 days in the 30, 25 and 20°C cubicles, respectively. Germination in the 15°C environment was very poor and could not be used to determine base temperatures. Using linear extrapolation of the response to temperature, the results indicated that emergence did not take place below 18.1°C for NCo376, 17.8°C for N16 and 16.8°C for N27. Seedcane of unfertilised origin germinated significantly more poorly than that of fertilised origin and sets planted in fertilised soil demonstrated significantly higher emergence counts (p = 0.05) compared to unfertilised soil. Setts planted in sun-dried soil did not grow roots or show signs of bud swelling and differentiation.Results from this study may help explain the poor emergence under cool winter conditions or poor ratoonability experienced under trash. Results also indicated differences in cultivar sensitivity, and the methodology could be used to screen for better adaptation to the cooler Midlands or southern production areas.
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Claims 11
Claim · model-written summary
Bud emergence peaked at 14 days at 30°C.
Verbatim
e0“Bud emergence from a 60 mm planting depth peaked at 14, 22 and 56 days in the 30, 25 and 20°C cubicles, respectively.”
t0“sugarcane”
Claim · model-written summary
Bud emergence peaked at 22 days at 25°C.
Verbatim
e0“Bud emergence from a 60 mm planting depth peaked at 14, 22 and 56 days in the 30, 25 and 20°C cubicles, respectively.”
t0“sugarcane”
Claim · model-written summary
Bud emergence peaked at 56 days at 20°C.
Verbatim
e0“Bud emergence from a 60 mm planting depth peaked at 14, 22 and 56 days in the 30, 25 and 20°C cubicles, respectively.”
t0“sugarcane”
Claim · model-written summary
Germination at 15°C was very poor.
Verbatim
e0“Germination in the 15°C environment was very poor”
t0“sugarcane”
Claim · model-written summary
NCo376 did not emerge below 18.1°C.
Verbatim
e0“emergence did not take place below 18.1°C for NCo376”
t0“sugarcane”
Claim · model-written summary
N16 did not emerge below 17.8°C.
Verbatim
e0“17.8°C for N16”
t0“sugarcane”
Claim · model-written summary
N27 did not emerge below 16.8°C.
Verbatim
e0“16.8°C for N27”
t0“sugarcane”
Claim · model-written summary
Unfertilised seedcane germinated significantly more poorly than fertilised seedcane.
Verbatim
e0“Seedcane of unfertilised origin germinated significantly more poorly than that of fertilised origin”
t0“sugarcane”
Claim · model-written summary
Fertilised soil increased emergence counts compared with unfertilised soil.
Verbatim
e0“sets planted in fertilised soil demonstrated significantly higher emergence counts (p = 0.05) compared to unfertilised soil.”
t0“sugarcane”
Claim · model-written summary
Setts in sun-dried soil did not grow roots or show bud swelling and differentiation.
- Taxon
- sugarcanet0
- Treatment
- sun-dried soile0
- Outcome
- did not grow roots or show signs of bud swelling and differentiatione0
Not reportedComparatorDirection
Verbatim
e0“Setts planted in sun-dried soil did not grow roots or show signs of bud swelling and differentiation.”
t0“sugarcane”
Claim · model-written summary
The methodology could screen for adaptation to cooler production areas.
Not reportedComparatorValue
Verbatim
e0“the methodology could be used to screen for better adaptation to the cooler Midlands or southern production areas.”
t0“sugarcane”
The same questions in other papers
fertilization · growth · Saccharum officinarum (sugarcane)Positive and negative results
128 papers in the same direction as this paper · 14 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- no effect
143 papers more in this group
See all 147 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.