Planning good crop-management practices
To
apply good crop-management practices, it is necessary to know the
various development stages and phases of the rice plant. For example, to
know the appropriate transplanting time, it is important to know when
the rice plant starts developing tillers and for how long. When
transplanting is late, a good part of the tillering potential can be
lost. Plant development also determines the ‘right’ time for weeding and
fertilizer applications.
Effect of temperature on rice development
Rice phenology (the succession of rice development stages) depends,
among other factors, on air and water temperature and on photoperiod
(day-length), and thus, changes throughout the year. Phenology is
essentially a function of varietal choice and sowing date. A good
knowledge of rice development enables one to predict the best timing of
crop management interventions. The timing of these interventions - e.g.
application of fertilizer, weeding, last drainage before harvesting - is
directly linked to rice development. Temperature also directly
influences yield: high temperatures at flowering and low temperatures at
panicle initiation stage both lead to spikelet sterility and,
therefore, yield loss.
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