Using light integrals and vapor pressure deficit to simulate irrigation scheduling for container nursery production

Susmitha Nambuthiri, Amy Fulcher, Ethan Hagen, Robert Geneve

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In container nursery production, managing irrigation is critical for reducing agrichemical runoff. Boxwood (Buxus) and deutzia (Deutzia) plants grown in 1-gal and 3-gal containers respectively were conservatively irrigated by one of two substrate moisture sensor (SMS)-based regimes: 1) a daily water use (DWU) system that delivered the exact amount of water that had been lost in the previous 24 h and 2) an on-demand (OD) irrigation system based on a specific substrate moisture content derived from the relationship between substrate moisture and photosynthetic rate. Unfortunately, commercial nurseries have not readily adopted SMS-based irrigation systems partly due to expense and reliability of the sensors. The objective of the present study was to evaluate easily accessible weather variables [light integrals (LI) and vapor pressure deficit (VPD)] as a substitute for substrate moisture sensors to determine water volume applied for the DWU system and to predict timing of irrigation based on OD. Daily irrigation water volume was correlated with daily LI (correlation coefficient, R = 0.68 and 0.63 for boxwood and deutzia, respectively) and less so with accumulated vapor pressure deficit (R= 0.36 and 0.19 for boxwood and deutzia, respectively). The analysis suggested that irrigation should be scheduled following 6,227 W-m-2 for boxwood and 5,880 W.m-2 for deutzia plants.

Original languageEnglish
Title of host publicationJoint ASABE/IA Irrigation Symposium 2015
Subtitle of host publicationEmerging Technologies for Sustainable Irrigation
Pages763-770
Number of pages8
ISBN (Electronic)9781510815513
StatePublished - 2015
EventJoint ASABE/IA Irrigation Symposium 2015: Emerging Technologies for Sustainable Irrigation - Long Beach, United States
Duration: Nov 10 2015Nov 12 2015

Publication series

NameJoint ASABE/IA Irrigation Symposium 2015: Emerging Technologies for Sustainable Irrigation

Conference

ConferenceJoint ASABE/IA Irrigation Symposium 2015: Emerging Technologies for Sustainable Irrigation
Country/TerritoryUnited States
CityLong Beach
Period11/10/1511/12/15

Keywords

  • Boxwood
  • Daily water use
  • Deutzia
  • Photosynthesis
  • Set point
  • Substrate moisture

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

Fingerprint

Dive into the research topics of 'Using light integrals and vapor pressure deficit to simulate irrigation scheduling for container nursery production'. Together they form a unique fingerprint.

Cite this