Protection against temperature extremities and radiations Protection against

Protection against temperature extremities and radiations

Protection against temperature The plants in a nursery are very delicate and sensitive. Thus should be protected from adverse weather and climatic conditions. High temp and wind in a summer, low temp and chilly winds in a winter may kill the nursery plants. The young nursery plants are also highly susceptible to frost. Occurrence of frost even for a day destroy the whole nursery.

Frost • It is the condition of weather that occurs when air temp fall below freezin point. Water in a atmosphere deposited as a ice crystal on the ground or on exposed objects • The most damaging of frost in December, January. • Late frost also damages the plants in February. Negative effect of frost on plant growth: Frost occurrence is fetal for all type of plants, especially young, tender and succulent plants are more sensitive to frost injury than full grown plants.

Conti. . • The atmospheric temp goes below freezing 0 c allows the moisture present in the air crystalize and consiquantly deposited on the ground and plant surface. • This phenomenon will initiate the conversion of cellular water of plants body into ice, resulting in withering of cells and finally death of cell and tissues. • The effected cells and tissues will not resume growth and plants part become death.

Protection measures from frost: • Mulching: • Temp increases 2 -5 c. • Mulching can protect plants from root injury. • Covering with thatches: • Other than leaves, branches. Plants should covered with sugarcane trash, rice straw and maize. • Providing smoke screens: • Keep of dry leaves, grasses in the field at several places. it should be ignited and allowed to burn slowly.

Protection from hot desiccated weather: • High temp and desiccated winds in a summer may kill the nursery plants. Therefore, the seedlings should be protected from scorching sun. • Providing sun shade during day time. • Raising of wind breaks on northern and western sides of nursery. • Increasing the irrigation frequently. It should be increased during summer months to avoid the damage caused by water stress.