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Hydrogen cyanamide could stimulate the budbreak of 'Flordared'
buds and the germination of 'Premier' seeds dormancy.
However, It also occurred the inhibit of budbreak, removed or
dead for buds while we used higher concentration of hydrogen
cyanamide. The results may explain the hypothesis that
sublethal dosages or damaged concentration is necessary for
hydrogen cyanamide. In the TTC ( 2.3.5-triphenyltetrazolium
chloride ) tested the viability of peach tissue recovered 120
hours after treatment suggests that the compensatory growth may
be induced to break bud dormancy. We compared peach (prunus
persica(L.) Batsch.) seed and seedling emergence after hydrogen
cyanamide and various stratification treatments. Four hours
chemicals soaking for seeds were inhibit germination and the
seedling was often physiologically dwarfed after chemicals
treatments. It meant the chemicals could not replace the GA or
stimulate GA synthesis and higher dosages caused damaged. The
combination of hydrogen cyanamide with ABA caused the budbreak
delay and the lower concentration of hydrogen cyanamide would
form a special "path". It could be very functional through
using the "path". Forcing culture of 'Premier' and
'Flordared' peaches have been test in the lowland of central
Taiwan by painting hydrogen cyanamide from winter to early
spring. 0.6% or 1.2% of hydrogen cyanamide are suitable to
break peach bud dormancy from January to February. The harvest
time was 2 weeks earlier than control was. The fruits could be
picked just before rainy season and sold to market in off-
season of imported peach.
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