İMPACT OF WATER-ABSORTION ABILITY ON AGROPHYSICAL INDICATORS OF THE TEA-FIT SOILS AKBAROVA ULKAR ZAKIR KIZI

Abstract

The tea plant is formed as the forest plant in a period of the filogenetic development and the diffused sunlight is less suitable for it than direct sunlight. Some authors note that shading of the tea plant has a good effect on vegetation and microclimate, and it creates a suitable condition for development and growth of the plant. Rain is one of the the most important climate factors for soil formation and use of the agricultural plants.

But the snow doesn’t remain for a long tine and quickly melts. Thickness of the snow cover reaches 80-100 cm and remains 15-20 days. It snows in December-January, rarely in November and February. The relative humidity is very low and forms 3.5 % in the Lankaran-Astara region. But this difference is 16-19% in the summer months, this is a reason for any state in water balance and observation of water stress in plant leaves.

The tea plant sensitive to air humidity compared to other plants. Besides, protective deforestation helps regulation of microclimate in the tea plantations and decrease of the wind velocity, falling of temperature in summer months and increase of the relative humidity. The south winds of the south-eastern and the winds close to it dries the soil in the summer season. These winds sometimes blow in sequence. At this time, it carries out small dust particles from Central Asia and has a harmful effect on the plants. Dry winds which are called “Garmic” blows little in the Lankaran-Astara region. Their velocity reaches 3-4 m/sec.in a normal condition, but sometimes it becomes 20 m/sec. These dry winds increase air temperature and decrease relative humidity.