Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Research on the water requirements of poplars in the nursery irrigated by sprinklers.

Abstract

Irrigation trials were carried out in two nurseries of a poplar clone in Italy, using the 'Irrisor' equipment made by Fiat. The soil at (a) Casale Monferrato was sandy, with a field moisture capacity of 24.5% and a wilting point at 3.5% of dry wt.; at (b) Orbassano the soil was also sandy with a field capacity of 20.5% and wilting point at 3.0% of dry wt. At (a) the soil profile was 50 cm deep, and at (b) over 1 m deep. Plant and sprinkler spacing were wider at (b) than (a), and water was applied at rates from 1.5 to 6 litres/h. At (a), irrigation significantly increased diameter and height growth and growth of the root system. At (b), irrigation had no significant effect on growth.