Abstract: In this paper, stomatal conductance of leaves and anatomical structure of leaf surface in a pine-tea interplantation and a pure tea plantation are studied using MK-3 Antomatical Porometer. The results show that in pine-tea interplantation, the thickness of upper epidermis, palisade tissue and whole leaf are smaller than those in pure tea plantation, and are 82.7%, 78.2% and 67.2% of the latter respectively; the leaf is tender and the stomatal conductance is smaller; the productivity of spring shoots, the average daily shoot growth, and the hundred-shoot weight of tea are 34.8%, 30.4% and 9.4% of the pure planted tea respectively. The stomatal conductance of tender leaf is greater than that of old leaf. For a common shoot with 5 leaves, the stomatal conductance of the 3rd leaf is the greatest and those of 2nd and 4th leaves are greater than those of 1st and 5th leaves. Vertically, the leaves in the toppest part of canopy (0—5cm) have the largest value of stomatal conductance, and the leaves in the middle part (10—15cm) have larger value than those in the lowest part (about 30cm). It is concluded that the stomatal conductance of tea leaf is affected not only by common ecological factors, but also by some physiological mechanisms related to leaf age, leaf position etc.

Key words: Pine-tea interplantation, Interplanted tea plantation, Camellia sinensis, Stomatal conductance