栽植密度を異にする柑橘園の微気象について (2)
気温分布
1963 年 18 巻 4 号 p. 139-142
詳細
1963 年 18 巻 4 号 p. 139-142
The space distribution of air temperature in two Citrus orchards, dense and open planting, was minutely measured by use of many radiation shielded thermo-couples, on clear summer days, 1955.
Fig. 1 and 2 show the temperature distributions at noon and midnight, respectively. Fig. 3 show the diurnal temperature march in or out the crowns and on the bare ground between the crowns.
Comparing the temperature distributions in two orchards, in the dense planting, the upper surface of the crown is especially heated up at noon-time and cooled down at night-time.
Then, it is almost similar to a forest type.
On the other hand, in the open planting, the inner snrface of the crown is heated up as well as the ground between the crowns.
However, the temperatures at the ground are cosiderably higher than those of the crowns.
At night, the crown as well as the ground is slightly cooled down.
These results are explained by the difference of leaf density, its distribution and wind velocity in two orchards.
