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ISHS Acta Horticulturae 8: Symposium on Peat Culture

EFFECT OF GROWTH RETARDANTS ON PLANTS GROWN IN PEAT

Author:   E. KAUKOVIRTA
Abstract:
Dr. Puustjärvi's continuous work for the development of peat culture in Finland is quite visible beginning to bear fruit. We are justified to say that most greenhouse plants, and first of all cut flowers, are nowadays grown in peat. On the other hand, in my opinion, peat has not yet achieved an established position in the culture of pot plants. No doubt peat culture will, however, become increasingly popular even in this field of horticulture, especially with regard to chrysanthemums. The favourable results gained in the growing of cutflowers certainly encourage age to try peat also for pot plants. And for purposes of pot plant production the weight of peat is an other advantages to be counted. The transport distances of all plant products have tendency to become longer and longer. This is true also with pot plants, and this makes it necessary to find light substrates for pot plants. These factors alone justify the presumption that peat will more and more be used for growing pot plants.

In discussion about modern culture of pot plants growth retardants cannot be set aside. The use of these retardants is already essential in the production of several pot plant crops, such as chrysanthemums for example. By use peat for pot plants the growth retardants may become even more important, for in many cases the growth of pot plants in peat exceeds their growth in soil. Therefore at the Institute of Horticulture, University of Helsinki with research on growth retardants an empfasis has been paid on peat culture.

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