Agriculture Reference
In-Depth Information
TABLE 2
Total and daily water use as well as final stem diameter in eastern redbud plants
exposed to a three-part cyclic irrigation event at three irrigation times (AM - 7 to 9 AM; Noon
- noon to 2 PM; PM - 5 to 7 PM).
Irrigation time
Total water use
(L
Daily water use
(L
Main stem diam-
eter (cm)
×
plant
-1
×
day
-1
)
×
plant
-1
×
day
-1
)
7 - gallon container size
3.°C
0.29a
AM
59.9c
z
Noon
71.1a
3.6a
0.36a
PM
64.9b
3.2b
0.30a
15 - gallon container size
AM
131.7
6.6
0.51a
Noon
136.5
6.8
0.51a
PM
129.4
6.5
0.35b
z
It means followed by the same letter within a column were not different using Turkey's test (a = 0.05).
21.8 CONCLUSIONS
This chapter discusses: Micro-irrigation scheduling strategies under PIP; and the need
to consider plant, environment, and substrate conditions in making accurate irrigation
decisions on a daily or more frequent basis. A case study has been presented. Recent
advances in substrate moisture sensing and wireless data communication may play a
major role in saving water and enhancing economic and environmental sustainability
of the PIP production system.
21.9 SUMMARY
Pot-in-Pot is an emerging sustainable nursery production system being used as an
alternative to field production for large shrubs and shade trees. Pot-in-Pot tree produc-
tion is a combination between traditional container production and field production
where the growing container is placed within a semipermanent, underground socket
pot. This system allows closer spacing compared to field production and permits pre-
cision application of irrigation and fertilizer. Pot-in-Pot has unique substrate water-
plant-atmospheric relationships compared to other nursery production methods. The
chapter discusses current micro irrigation practices for Pot-in-Pot nursery production
and highlight the impact of conservative irrigation scheduling strategies such as con-
trolled irrigation using substrate moisture sensors and cyclic irrigation on crop growth,
water and nutrient use efficiency. A case study has been presented.
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