Uman NUH | today: 09/04/2019

Weed infestation of flax after various preceding crops in the nonherbicide technology

Author(s) Eshchenko V.O., Doctor of Agricultural Sciences, Professor, Head of Department of General Agriculture, Uman National University of Horticulture, Ukraine
Koval S.P., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine
Category The Agronomy
year 2013 issue Випуск №83. Частина 1
pages 8-12 index UDK 632.51:631.582
DOI
Abstract Researches were conducted on the experimental field of the Department of General Agriculture of Uman National University of Horticulture, where flax was grown for three years secondary to preceding crops. The technology of cultivation of flax and its preceding crop was nonherbicide. Weed infestation in the period of seedling and early flowering of flax was determined by the quantative method using a square frame sized 0.25m2 in 5-time replication on the field, and by the quantative and weight scaling method in the end of vegetation. Recorded data showed that in the period of seedling in general from 2007 to 2009 the total quantity of weed crops was the least after preceding sugar beet, grain maize and buckwheat, and the largest — in the recurrent cultivation of flax and after preceding soya. In the last variant there was the largest quantity of perennial weeds in the flax seedling, specific gravity of which remained high also after the preceding crops and to the end of the vegetation of flax. In the period of early flowering of flax as for the least weed infestation the preceding crops could be listed in the following order: sugar beet — spring wheat, spring barley and buckwheat – pea – soya – flax. In the end of vegetation the least weed infestation was recorded after spiked grains, then intertilled crops and buckwheat, and the largest quantity of weed crops was found in in the recurrent cultivation of flax and after preceding soya. That’s why the last variants shouldn’t be used as preceding crops in the nonherbicide technology of the cultivation of flax.
Key words flax, preceding crops, weed infestation
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