Effect of Optimization of Fertigation Management on Growth, Yield, Nitrate and Water Use Efficiency in Tomato Bag Culture Based on Integrated Solar Radiation and Vapor Pressure Deficit Values

• CHANSEETIS Charturong

  <I>Department of Bioproduction Science, Faculty of Horticulture, Chiba University</I>

• SHINOHARA Yutaka

  <I>Department of Bioproduction Science, Faculty of Horticulture, Chiba University</I>

• MARUO Toru

  <I>Department of Bioproduction Science, Faculty of Horticulture, Chiba University</I>

• TAKAGAKI Michiko

  <I>Department of Bioproduction Science, Faculty of Horticulture, Chiba University</I>

• HOHJO Masaaki

  <I>Department of Bioproduction Science, Faculty of Horticulture, Chiba University</I>

Abstract

Tomato plants were grown in a bag culture system with a drip irrigation system using coco-nut coir as substrate. For the treatments the same volume of nutrient solution (50mL) with 2 different amounts of NO₃-N (0.4 and 0.5 me plant¹ MJ^-1 m^-2) was supplied when cumulative solar radiation value reached 1 MJ m². Different volumes of water were supplied at the same time as the supply of nutrients. There were 4 additional water supply treatments with varying amounts of water supply for vapor pressure deficit as follows: V-0 (no additional water supply), V-1, V-2, and V-3, respectively with the total of 8 treatments. In the V-0 treatments with both of NO₃-N amounts, the contents of total soluble solids in the fruits were the highest, while the leaf dry weight, photosynthetic rate and yield were the lowest. This study revealed that a concentration of 0.4 me NO₃-N plant^-1 MT^-1 m^-2 was the optimum for tomato production in this system. The 0.4V-3 treatment was associated with a low percentage of drainage, high water use efficiency and high nitrate use efficiency. The recommendation for fertigation management consisting of varying the amounts of NO₃-N and of additional water depending on the data of NO₃-N consumption in the 0.4V-3 treatment was explained.

Journal

• Environment Control in Biology

  Environment Control in Biology 43 (1), 13-20, 2005

  Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

Keywords

• fertigation
• tomato
• solar radiation
• vapor pressure deficit (VPD)

Details

• CRID: 1390282680236916352
• NII Article ID: 130003856926
• NII Article ID: 10018078624
• NII Book ID: AA12029220
• DOI: 10.2525/ecb.43.13
• ISSN: 18830986
• ISSN: 1880554X
• NDL BIB ID: 7318243
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7318243
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed