YIELD
AND WATER RELATION OF COWPEA AND PEA PLANTS AS AFFECTED BY WATER REGIME
[58]
Byan2, Usrya A.; M.Z. El-Shinawy1;
Hosnia, M. Gomaa1 and
M.H. Mahmoud2
Two experiments were laid out for each of cowpea (Vigna unguiculata
[L.] wal.) cvs. Kafr El-Shekh 1 and Dokki 331 as summer crop, pea (Pisum
sativum L.) cvs. Master B and sugar pea (Pisum sativum var.
macrocarpon) cvs. Snow Wind as
winter crop, to study their response to different levels of water regime
in sandy and clay soils. Cultivars, soil types and amount of irrigation water
exerted considerable effect on yield and yield attributes of cowpea and pea
plants. Results may indicate to raise Dokki
331 cultivar in sandy soil
and supplied by 120% of irrigation water calculated
by class
A pan method to
achieve high
yield of
cowpea. Kafr
El-Sheikh 1 cv is not recommended under lower amounts of irrigation
water. On the other hand, clay soil and irrigation with 80% of water (class A
pan method) seemed to be the suitable conditions
for growing
Master B cultivar,
whereas Snow Wind cultivar
can thrive
well under sandy or
clay soil conditions.
Water consumptive use (WCU)
of cowpea was greater than that of pea and amounted to 0.426, 0.532 and 0.639 m³/m²
for cowpea and 0.101, 0.127 and 0.152 m³/m²
for pea when irrigated by 80, 100 and 120% of water calculated by class A
pan method, respectively.
Values of ETa for cowpea and
pea plants
increased considerably
and remarkably by
increasing the amount of irrigation water. Crop coefficient (Kc) for pea
suggested by FAO can
work well under
South Delta
environmental conditions in Egypt. On the other hand, water use
efficiency (WUE) of cowpea was less than that of pea under different levels of
water regime treatments.