Study On Water Requirement Of Tomato Growing In The Solar Greenhouse

The environment differs a lot in different seasons in the solar greenhouse. In the solar greenhouse light become stronger, temperature become higher and the humidity become lower in winter-spring. On the other hand, light become weaker, temperature become lower and the humidity in the solar greenhouse become higher in autumn-winter. In a word, tomato grows better in winter-spring , but in autumn-winter tomato grows not so good. For human control, the height and the number of leaves have little difference between in autumn winter and winter spring, but the leaf area per plant in autumn is 1165.5cm2 larger than that in winter-spring, and is 136.32% of that in winter-spring.Tomato needs different amount of water in different season or in different growth state, even in the same season and growth state, tomato needs different amount of water in different weather. In winter spring tomato needs 185.95m3 water when the soil is not covered; needs 85.43m3 water when soil is covered. In autumn winter tomato needs 139.93m3 water when the soil is not covered; needs 85.58m3 water when soil is covered.The interrelation between water requirement and environment in solar greenhouse differs in different season . In winter-spring temperature and humidity has a higher correlation than light, in autumn, light has the highest correlation with water requirement of tomato growing in solar greenhouse. A formula is also provided to calculate tomato leave area.