Figure 1:
Mean daily evapotranspiration of the
evaluated forage cactus clones and accumulated
rainfall (P) of the experimental period of 499
days divided into nine periods. Period 1, from
October 20th, 2010, to December
15th, 2010; period 2, from December
16th, 2010, to February 9th,
2011; period 3, from February 10th,
2011, to April 18th, 2011; period 4,
from April 19th, 2011, to June
17th, 2011; period 5, from June
18th, 2011, to August 8th,
2011; period 6, from August 9th, 2011,
to September 26th, 2011; period 7, from
September 27th, 2011, to November
14th, 2011; period 8, from November
15th, 2011, to January 4th,
2012; and period 9, from January 5th,
2012, to March 2nd, 2012. Equal letters
in vertical bars do not differ by Tukey's
studentized test, at 5% probability.
nsNonsignificant. The values of DP/CR,
ΔA, and ETac are averages of three
replicates. IPA, IPA Sertânia; MIU, Miúda; and
OEM, Orelha de Elefante Mexicana.
Figure 2:
ET/ETo ratio for the three evaluated forage
cactus clones, rainfall (P), and reference
evapotranspiration (ETo) during the experimental
period of 499 days divided into nine periods.
Period 1, from October 20th, 2010, to
December 15th, 2010; period 2, from
December 16th, 2010, to February
9th, 2011; period 3, from February
10th, 2011, to April 18th,
2011; period 4, from April 19th, 2011,
to June 17th, 2011; period 5, from June
18th, 2011, to August 8th,
2011; period 6, from August 9th, 2011,
to September 26th, 2011; period 7, from
September 27th, 2011, to November
14th, 2011; period 8, from November
15th, 2011, to January 4th,
2012; and period 9, from January 5th,
2012, to March 2nd, 2012. Equal letters
in vertical bars do not differ by Tukey's
studentized test, at 5% probability.
nsNonsignificant. The values of DP/CR,
ΔA, and ETac are averages of three
replicates. IPA, IPA Sertânia; MIU, Miúda; and
OEM, Orelha de Elefante Mexicana.
Figure 3:
Cladode area index increment and values at
the end of the cycle of the three evaluated forage
cactus clones during the experimental period of
499 days divided into nine periods. Period 1, from
October 20th, 2010, to December
15th, 2010; period 2, from December
16th, 2010, to February 9th,
2011; period 3, from February 10th,
2011, to April 18th, 2011; period 4,
from April 19th, 2011, to June
17th, 2011; period 5, from June
18th, 2011, to August 8th,
2011; period 6, from August 9th, 2011,
to September 26th, 2011; period 7, from
September 27th, 2011, to November
14th, 2011; period 8, from November
15th, 2011, to January 4th,
2012; and period 9, from January 5th,
2012, to March 2nd, 2012. Equal letters
in vertical bars do not differ by Tukey's
studentized test, at 5% probability.
nsNonsignificant. The values of DP/CR,
ΔA, and ETac are averages of three
replicates. IPA, IPA Sertânia; MIU, Miúda; and
OEM, Orelha de Elefante Mexicana.
Figure 4:
Relationship between the actual
evapotranspiration (ET) during the studied period
and the reference evapotranspiration
(ETo) of the evaluated forage cactus
clones, cladode area index increment (ΔCAI),
and soil water storage variation (ΔA) during
the experimental period of 499 days, divided into
nine periods (in parenthesis). Dashed lines
represent lower soil water availability; and
continuous lines, higher soil water availability.
Period 1, from October 20th, 2010, to
December 15th, 2010; period 2, from
December 16th, 2010, to February
9th, 2011; period 3, from February
10th, 2011, to April 18th,
2011; period 4, from April 19th, 2011,
to June 17th, 2011; period 5, from June
18th, 2011, to August 8th,
2011; period 6, from August 9th, 2011,
to September 26th, 2011; period 7, from
September 27th, 2011, to November
14th, 2011; period 8, from November
15th, 2011, to January 4th,
2012; and period 9, from January 5th,
2012, to March 2nd, 2012. The values of
ET, ΔCAI, and ΔA are averages of three
replicates. IPA, IPA Sertânia; MIU, Miúda; and
OEM, Orelha de Elefante Mexicana.
Table 1:
Physical characteristics of the soil
cultivated with the evaluated forage cactus clones
under rainfed conditions in the Brazilian semiarid
region.
Table 2:
Comparison of the cumulative values of deep
drainage (DD), capillary rise (CR), soil water
storage variation (ΔA), actual
evapotranspiration (ETac), and daily
actual evapotrasnpiration (ETd) of the
IPA Sertânia, Miúda, and Orelha de Elefante
Mexicana (OEM) clones during the experimental
period of 499 days(1).
Table 3:
Rainfall (P), number of days per period
(DNP), reference evapotranspiration
(ETo), runoff (R), deep drainage (DD),
capillary rise (CR), soil water storage variation
(ΔA), and accumulated actual
evapotranspiration (ETac) of the IPA
Sertânia (IPA), Miúda (MIU), and Orelha de
Elefante Mexicana (OEM) clones.