Abstract
To avoid the current water pollution from intensive glasshouse horticulture, closed systems have to be developed with recirculating drainage water. For crops with a high planting density, such as letuuce, shallow beds of coarse sand may be used if water and nutrient supply can be regulated adequately. The aim of the present study was to determine the rooting characteristics and root distribution of lettuce in sand beds, as affected by substrate depth, the distance to a drain, drip lines and drip points, and the excess of nutrient solution applied. The hypothesis was tested that a small excess and a large distance between drip points leads to local salt accumulations in the root environment and thus to a less homogeneous root distribution.
The data confirmed both parts of the hypothesis: spatial patterns in salt distribution were found. Detailed measurements in a sand bed with only one drip line per two crop rows and an amount of fertigation solution added of 2 times the estimated evapotranspiration, showed that root length density was negatively correlated with salt content when comparisons were made within the same layer. Crop yield per row was influenced in the extreme treatment, i.e. one drip line per two crop rows and an amount of fertigation solution added of 1.3 times the estimated evapotranspiration, but yield per bed was still unaffected. The increased heterogeneity of the crop will cause problems at harvest and indicates that the most extreme treatment included in the comparison is just beyond the limit of acceptable heterogeneity in the root medium. Lettuce can be grown on sand beds with a recirculating nutrient solution provided that drip lines are well distributed in the bed and the daily nutrient solution excess is more than 30% of demand.
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References
Anonymous 1992 Niederländischer Gartenbau auf dem Weg zu umweltfreundlichen Produktionsmethoden. Nederlandse Tuinbouwvakbeurs (NTV). pp 8–9. BV Bureau IBA, Den Haag, the Netherlands.
Bernstein L 1964 Salt tolerance of plants. Agricultural Information Bulletin No. 283 US Department of Agriculture, Washington. 23 p.
De Graaf R and Spaans L 1989 Automatisering watergeven bij teelten op substraat met behulp van een watergeefrekenmodel. Proefstation voor Tuinbouw onder Glas, Naaldwijk, the Netherlands. Intern Verslag nr. 33. 15p.
De Jager A 1985 Response of plants to a localized nutrient supply. PhD thesis, University of Utrecht, The Netherlands. 137p.
De Willigen P and Van Noordwijk M 1987 Roots, plant production and nutrient use efficiency. PhD thesis, Wageningen Agricultural University, Wageningen, the Netherlands. 282p.
De Willigen P and Van Noordwijk M 1989 Model calculations on the relative importance of internal longitudinal diffusion for aeration of roots of non-wetland plants. Plant and Soil 113, 111–119.
Dickob D 1992 Übersicht und Begriffsdefinitionen über “geschlossene Bewässerungssysteme”. Gartenbau Magazin 10, 67–70.
Fröhlich H 1956 Die Bodendurchwurzelung seitens verschiedener Gemüsearten. Arch. Gartenbau IV, 389–417.
Genstat 5 Committee 1975 Genstat 5 Reference Manual. Clarendon Press, Oxford. 749p.
Göhler F and Drews M 1989 Hydroponische Verfahren bei der Gemüseproduktion in Gewächshäusern. IGA-Ratgeber, Markleeberg, 1. Aufl. 108p.
Greenwood D J, Gerwitz A, Stone D A and Barnes A 1982 Root development of vegetable crops. Plant and Soil 68, 75–96.
Heinen M and Van Moolenbroek J 1995 Water balance of lettuce grown on sand beds. Acta Hortic. (In press).
Heinen M, De Jager A and Niers H 1991 Uptake of nutrients by lettuce on NFT with controlled composition of the nutrient solution. Neth. J. Agric. Sci. 39, 197–212.
Hurd R G 1978 The root and its environment in the nutrient film technique of water culture. Acta Hortic. 82, 87–97.
Jensen M H and Collins W H 1985 Hydroponic vegetable production. Hortic. Rev. 7, 483–558.
Kipp J A and Wever G 1993 Wortelmedia. Proefstation voor Tuinbouw onder Glas, Naaldwijk, the Netherlands. Informatiereeks No 103. 48p.
Kirkham M B and D Gabriels 1979 Water and nutrient uptake of wick-grown plants. Hort. Res. 19, 3–13.
Krüger I 1993 Die Nährstoffaufnahme und-verwertung beim Anbau von Gurke und Tomate auf Mineralwolle als Grundlage für eine bedarfsgerechte nährstoffversorgung. Dissertation Humboldt Universität zu Berlin, Germany. 105p.
Maas E V and Hoffman G J 1977a Crop salt tolerance-current assessment. J. Irrig. Drainage Div. ASCE 103 (IR2), 115–134.
Maas E V and Hoffman G J 1977b Crop salt tolerance: evaluation of existing data. In Managing Saline Water for Irrigation. Proceedings of the International Salinity Conference. Ed. H EDregne. pp 187–198. Texas Tech University, Lubbock, Texas, USA.
Meijboom F and Van Noordwijk M 1992 Rhizon soil solution samplers as artificial roots. In Root Ecology and its Practical Applications 3. ISRR Symp. Wien, Univ. Bodenkunde, 1991. Eds. LKutschera, EHübl, ELichtenegger, HPersson and MSobotnik. pp 793–795. Verein für Wurzelforschung, Klagenfurt, Austria.
Molitor H D 1991 Erdelose Kulturverfahren. Dtsch. Gartenbau 33, 2020–2024.
Otten W 1994 Dynamics of water and nutrients for potted plants induced by flooded bench fertigation: experiments and simulation. PhD Thesis, Wageningen Agricultural University, Wageningen, The Netherlands. 115p.
Richards L A (ed) 1954 Diagnosis and improvement of saline and alkali soils. Agricultural Handbook No 60. U S Department of Agriculture, Washington. 160p.
Schröder F G 1993 Beiträge zur Entwicklung und pflanzenbaulichen Bewertung des erdelosen Kulturverfahrens “Plant Plane Hydroponic”. Dissertation Humboldt Universität zu Berlin, Germany. 128p.
Schuurman J J and Schäffner B E 1974 De wortelontwikkeling van enige tuinbouwgewassen op zandgrond. Rapport 11–74, Instituut voor Bodemvruchtbaarheid, Haren, the Netherlands. 62p.
Sonneveld C and Straver N 1988 Voedingsoplossingen voor groenten en bloemen geteeld in water of substraten. Proefstation voor Tuinbouw onder Glas, Naaldwijk, the Netherlands. Voedingsoplossing Glastuinbouw no 8. 33p.
Sonneveld C, Van Den Ende J and De Bes S S 1990 Estimating the chemical compositions of soil solutions by obtaining saturation extracts or specific 1:2 by volume extracts. Plant and Soil 122, 169–175.
Tennant D 1975 A test of a modified line intersect method of estimating root length. J. Ecol. 63, 995–1001.
Van Noordwijk M 1990 Synchronization of supply and demand is necessary to increase efficiency of nutrient use in soilless horticulture. In Plant Nutrition-Physiology and Applications. Ed. M LVanBeusichem. pp 525–531. Kluwer Academic Publishers Dordrecht, the Netherlands.
Van Noordwijk M and Brouwer G 1993 Gas-filled root porosity of crop plants in response to temporary low oxygen supply in different growth stages. Plant and Soil 152, 187–199.
Van Noordwijk M and De Willigen P 1987 Agricultural concepts of roots: from morphogenetic to functional equilibrium between root and shoot growth. Neth. J. Agric. Sci. 35, 487–496
Van Noordwijk M and Raats P A C 1980 Drip and drainage systems for rockwool cultures in relation to accumulation and leaching of salts. pp 279–287. Proceedings 5th Intern. Congress on Soilless Culture, Wageningen, the Netherlands 1980.
Van Velden P I 1988 Afvalverwerking steenwol. Groenten en Fruit, Den Haag 44, 12, 41–42.
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Schwarz, D., Heinen, M. & Van Noordwijk, M. Rooting characteristics of lettuce grown in irrigated sand beds. Plant Soil 176, 205–217 (1995). https://doi.org/10.1007/BF00011784
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DOI: https://doi.org/10.1007/BF00011784