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PLENARY SPEAKER 1 ABSTRACT

Evapotranspirative Irrigation/Fertigation For Horticulture

PROF. DR. IR. BUDI INDRA SETIAWAN

Bogor Agricultural University (IPB), Indonesia

ABSTRACT

Evapotranspirative irrigation (ETI) refers to the irrigation technique in which the water

supplied to the plants is driven by the actual crop evapotranspiration. The water absorbed by
the plants from the soil will be replenished instantaneously by the irrigation water with the

same volume without energy consumption. This lecture describes ITE theoretically and
experimental works to grow water lettuce in pots. The yield was 258.9 g/m2 with the water

use efficiency reaching 95%. While the economical and physical water productivities were
2.17 g/L and 2.28 g/L, respectively. Water levels in the pots were maintained within an

expected range while the soil moisture above was in an unsaturated condition. This irrigation

technique is highly water-efficient, inexpensive, and easily manageable.