Agriculture Reference
In-Depth Information
verse effect on overall quality production and productivity, as evidenced
by the characteristic color pigmentation on the pericarp receiving different
amount of shade inside the canopy. The process of photosynthesis in this
evergreen plants depend on environmental conditions and the physiology
of the leaves. The distribution of light and leaf nitrogen within the tree
usually a good indication of potential photosynthesis. The seasonal varia-
tion due to day to day changes in weather conditions have been found to
influence the rate of photosynthesis and its contribution in growth and
fruit production.
6.2.1.4 WINDS
The initial establishment, proper growth and performance of litchi have
been found affected by nature of winds. Litchi plantation at its initial
stage experiencing hurricanes/high wind storm hamper establishment.
The speedy wind, storm and squalls during the period of bloom and fruit
development damage the crop severely, may cause complete crop loss.
Hot winds during summer have an adverse effect both on fruit and foli-
age growth, which is more so in the areas adjacent to open areas that are
not fully protected with windbreaks. Wind also lead to a loss of vigor and
consequently, slower growth. Fruit drop at initial stages of its growth can
be noticed due to high velocity of wind.
6.2.1.5
FOG AND FROST
Occurrence of fog a regular phenomenon in this region (Bihar) and fog
definitely curtails light supply and reduces photosynthesis. Occasionally,
spring frosts are particularly harmful to litchi plants. Frost may either kill
the reproductive organs of the flower or completely destroys the blossoms,
thereby influencing the fruit-set and ultimately the fruitfulness. Litchi
young plants are extremely sensitive to cold and require frost protection.
Frost has been regarded as one of the important factors responsible for
causing drastic effect on bearing behavior and even leading to mortality
of the plants/trees. The extent of damage by frost depends upon age of
the tree, moisture content of the soil, condition of growth, actual timing
of frost occurrence, severity and duration of the frost. It has been found
