Abstract:
An experiment was conducted at the Demonstration Farm of New Halfa Research Station, during
season 2017/2018 with the objectives of determining the crop water requirements for Guar
(Cyamopsistetragonoloba) and investigating the effect of irrigation quantity on crop water
productivity (kg/m3) under furrow irrigation system. The treatments included four irrigation
quantities namely; T1500mm3, T2400m3, T3300m3 and T4200m3. These treatments were
arranged in randomized completely block design (RCBD) with four replicates. The parameters
tested were irrigation efficiency (IE%), crop water requirements for guar (mm/day), growth
parameters (plant height, stem diameter and no of branches), crop productivity (kg/ha) and water
use efficiency (kg/m3). The results showed that, irrigation efficiency of furrow system was very
low (45%). Crop water requirements for guar were differ among the growing season which was
recorded the lowest values in March (3.73mm/day) and the highest in April (8.61mm/day).
Growth parameters significantly (P ? 0.05) affected by the different irrigation quantities. 500m3
of applied water significantly increased the plant height (32cm), stem diameter (5.3cm) and no of
branches (14) as compared to 200m3 which ranked the least (28.11cm, 4.83cm and 13,
respectively. Crop productivity and water use efficiency significantly affected by the different
irrigation quantities. Irrigation quantity of 500m3 gave the highest value of crop productivity
(2288kg/ha) while 200m3 recorded the highest mean values of water use efficiency (9.22 kg/
m³). It concluded to maximize crop productivity and water use efficiency, the management of
irrigation systems via; when to irrigate and how much irrigation water to be applied with regard
to crop water requirement should be followed and adopted. |
